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Multi-Peptide + Copper Peptides 1% for Wrinkles and Skin Elasticity
The Ordinary
$32.00
View Product ↗Ingredients
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Butylene glycol is a humectant—a type of ingredient that draws water into the skin and helps it stay hydrated. It's a small, lightweight molecule commonly used in moisturizers to improve hydration without leaving a heavy feel on the skin.
Benefits
- Increases skin hydration and moisture retention
- Lightweight and absorbs quickly
- Helps other active ingredients penetrate the skin more effectively
Science: Research demonstrates that butylene glycol, when combined with other humectants (like glycerin and hyaluronic acid) and occlusive ingredients in moisturizers, significantly improves skin hydration in both healthy skin and compromised skin conditions such as atopic dermatitis. It is recognized as a safe, effective humectant in dermatological formulations.
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Glycerin is a naturally derived humectant—a ingredient that draws moisture from the air into your skin. It's one of the most widely used and well-studied moisturizing agents in skincare, helping skin feel softer and more hydrated.
Benefits
- Attracts and retains moisture in the skin
- Improves skin hydration and softness
- Helps strengthen skin barrier function
- Suitable for most skin types, including sensitive skin
Science: The Cosmetic Ingredient Review Expert Panel concluded glycerin is safe as used in cosmetics across all concentrations. Research shows glycerin effectively improves skin hydration and is well-tolerated with minimal irritation risk. It is also referenced in clinical guidelines for managing inflammatory skin conditions and maintaining skin integrity.
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Trehalose is a naturally occurring sugar (disaccharide) used in skincare products for its stabilizing and protective properties. It helps preserve the integrity of skin cells and other ingredients, particularly when exposed to environmental stressors like heat or dryness.
Benefits
- Helps stabilize and protect skin cells from damage
- May improve skin barrier function and reduce moisture loss
- Supports ingredient stability in formulations
Science: Trehalose is widely recognized in biopharmaceutical and cosmetic industries for its cryoprotective and stabilizing properties. While peer-reviewed evidence specifically for topical skincare benefits is limited, research demonstrates its effectiveness as a cellular protectant and its ability to enhance the uptake and efficacy of other beneficial compounds in tissues.
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Sodium hyaluronate is the salt form of hyaluronic acid, a naturally occurring substance found in your skin that acts like a moisture magnet. In skincare products, it absorbs water from the environment and binds it to your skin, helping to hydrate and plump the skin's surface.
Benefits
- Delivers intense hydration to the skin
- Helps reduce the appearance of fine lines by improving skin moisture
- Supports skin barrier function
- Suitable for all skin types, including sensitive and oily skin
Potential concerns
- In very dry climates with low humidity, it may draw moisture from deeper skin layers if not sealed with an occlusive product
- Rare allergic reactions are possible but extremely uncommon
Science: While the provided research focuses on intra-articular injections for joint health (showing good safety and efficacy), hyaluronic acid and its salt form are well-established in dermatology for topical hydration. The molecule's safety profile is well-documented across decades of use in medical and cosmetic applications, with severe adverse reactions being extremely rare.
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Caprylyl glycol is a preservative and skin-conditioning ingredient derived from coconut oil. It helps prevent bacterial and mold growth in skincare products while also providing mild hydrating and humectant benefits to the skin.
Benefits
- Helps preserve product freshness and prevent contamination
- Provides gentle humectant properties to help retain skin moisture
- Often used as a gentler alternative to traditional preservatives
Potential concerns
- Rare cases of allergic contact dermatitis have been reported in sensitive individuals
- May cause irritation in those with known sensitivity to glycols
Science: A 200-subject repeat patch test study found no delayed hypersensitivity reactions to caprylyl glycol at typical use concentrations. However, isolated case reports of allergic contact dermatitis exist, suggesting it can act as an allergen in susceptible individuals. It is widely used in infant and sensitive-skin formulations as a preservative alternative.
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Citric acid is a naturally occurring organic acid commonly used in skincare products as an exfoliant and pH balancer. It belongs to a group of ingredients called alpha-hydroxy acids (AHAs) that help remove dead skin cells from the surface.
Benefits
- Gentle exfoliation to improve skin texture and appearance
- Helps reduce the appearance of keratosis and acne
- Balances product pH to maintain skin compatibility
Potential concerns
- Can cause irritation, redness, or sensitivity in some users, especially with prolonged or frequent use
- May increase sun sensitivity — sunscreen use is recommended when using AHA products
- Not suitable for very sensitive or compromised skin without caution
Science: Citric acid is an established AHA used in cosmetics for superficial peeling and skin appearance improvement, though research emphasizes that caution should be exercised due to potential adverse reactions. It is widely produced industrially and well-established in skincare formulations.
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Sodium benzoate is a preservative used in skincare products to prevent bacterial and fungal growth, extending shelf life. It's a salt derived from benzoic acid and is one of the most widely used preservatives in cosmetics, skincare, and food products.
Benefits
- Prevents microbial contamination and extends product shelf life
- Generally effective at low concentrations (0.1-0.5%)
- Approved for cosmetic use by major regulatory bodies
Potential concerns
- Can cause allergic contact dermatitis in sensitive individuals; identified as an allergen in medical hand cleansers
- Recent research suggests long-term oral intake may affect bone health and increase osteoporosis risk, though topical skincare exposure is minimal
Science: Sodium benzoate is well-established as a safe preservative in cosmetics at typical use levels. However, emerging research indicates that chronic systemic intake may interfere with bone metabolism through the FGF2/p38/RUNX2 pathway. For topical skincare use, the exposure and absorption are minimal compared to dietary intake, but individuals with known sensitivities should avoid it.
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Phenoxyethanol is a preservative that prevents bacteria, yeast, and mold from growing in skincare products, helping them stay fresh and safe to use. It has been used safely in cosmetics for decades and is effective at very low concentrations.
Benefits
- Prevents microbial contamination and product spoilage
- Broad-spectrum antimicrobial activity against bacteria and yeast
- Minimal impact on beneficial skin bacteria when used at approved levels
Potential concerns
- Rare allergic contact dermatitis in sensitive individuals
- May cause irritation if used in products at concentrations above 1%
Science: The European Scientific Committee on Consumer Safety considers phenoxyethanol safe for all consumers, including children, at concentrations up to 1%. Adverse effects observed in animal studies required exposure levels approximately 200 times higher than those in cosmetic products, and it is classified as one of the most well-tolerated preservatives in cosmetics.
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Water is the primary ingredient in most skincare products, serving as a solvent that dissolves and carries other active ingredients to your skin. It helps hydrate the skin surface and provides the base texture for creams, serums, and lotions.
Benefits
- Hydrates and plumps skin
- Dissolves and delivers active ingredients
- Maintains skin barrier moisture
Science: Water is the most extensively studied skincare ingredient with a century of dermatological evidence confirming its safety and essential role in skin hydration and product formulation.
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Aspartic acid is a naturally occurring amino acid that plays a structural role in skin proteins and the extracellular matrix. In skincare products, it may be used to support skin firmness and resilience, though its primary function is typically as a pH buffer or humectant rather than an active anti-aging ingredient.
Benefits
- Supports skin structure as a building block for proteins
- May help maintain skin hydration as a humectant
- Functions as a pH buffer in formulations
Science: Research indicates aspartic acid undergoes racemization (structural change) during skin aging and elastic fiber degradation, suggesting it plays a role in maintaining skin elasticity over time. However, peer-reviewed evidence for aspartic acid as a standalone active skincare ingredient is limited; most studies focus on its structural role in aging rather than its topical application benefits.
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Alanine is a simple amino acid—a building block of proteins—used in skincare products to support skin hydration and provide conditioning benefits. It helps maintain the skin's natural moisture barrier and is generally used in small concentrations as part of formulation systems.
Benefits
- Supports skin hydration and moisture retention
- Helps condition and soften skin texture
- May contribute to the skin's natural amino acid profile
Science: Limited peer-reviewed data available specifically for alanine in topical skincare applications. Alanine is a naturally occurring, non-essential amino acid that is well-tolerated by skin and widely recognized as safe in cosmetic formulations.
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Glycine is a simple amino acid that serves as a building block for collagen, the protein responsible for skin structure and elasticity. In skincare, it helps support skin firmness and may contribute to anti-aging benefits when used as part of collagen-based formulations.
Benefits
- Supports collagen production and skin structure
- May help reduce the appearance of fine lines and wrinkles
- Contributes to skin firmness and elasticity
Science: Research indicates that glycine, as a key amino acid in marine collagen supplements, plays a role in combating skin aging by supporting collagen integrity and minimizing oxidative stress. However, most anti-aging benefits are demonstrated when glycine is consumed as part of collagen peptides rather than applied topically alone.
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Serine is a naturally occurring amino acid that your skin produces on its own. In skincare products, it helps support the skin's natural moisture barrier and may contribute to overall skin hydration and structure.
Benefits
- Supports skin hydration and moisture retention
- Helps maintain skin barrier function
- May improve skin texture and smoothness
Science: Limited peer-reviewed data available for this ingredient in cosmetic skincare applications. Serine is a fundamental amino acid involved in skin biology, but the provided research focuses on disease mechanisms (fibrosis and pemphigus) rather than cosmetic benefits in healthy skin.
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Valine is an amino acid—one of the building blocks your body uses to make proteins. In skincare products, it's included to help support skin structure and barrier function, though it's present in very small amounts compared to what you get from food.
Benefits
- May support skin barrier integrity
- Provides amino acid building blocks for skin proteins
- Generally well-tolerated by sensitive skin
Science: Valine is a standard amino acid with an established safety record in cosmetics. The provided research focuses on prion disease diagnosis using valine polymorphisms as a genetic marker, which is unrelated to skincare efficacy. Limited direct evidence exists on valine's topical skincare benefits in peer-reviewed literature.
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Isoleucine is an amino acid (a building block of proteins) that occurs naturally in the body and in foods. In skincare, it's included in formulations for its potential role in supporting skin structure and resilience, though it's typically present in small amounts.
Benefits
- May support skin barrier function as part of amino acid profiles
- Potential antioxidant properties when combined with other botanical compounds
- Could contribute to skin firmness and elasticity through protein synthesis support
Science: Recent research identifies isoleucine as one of several salivary metabolites with potential relevance to skin health screening, and it appears as a minor component in botanical extracts studied for UV photoaging protection. However, direct evidence for isoleucine's independent efficacy in topical skincare products is limited.
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Proline is an amino acid that serves as a building block for collagen, the protein responsible for skin firmness and structure. Your body uses proline (along with vitamin C) to create and repair collagen in the skin, which naturally declines with age.
Benefits
- Supports collagen production and skin structure
- May improve skin firmness and elasticity
- Helps with skin repair and wound healing
Science: Proline is an essential amino acid in collagen synthesis; vitamin C-dependent hydroxylation of proline is a critical step in forming stable collagen. Limited direct human studies exist on topical proline alone, though it is recognized as a key structural component in skin biology and collagen formation.
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Threonine is an amino acid that your body cannot produce on its own, so it must come from diet or skincare products. In skincare, it functions as a humectant and skin-conditioning agent, helping to attract and retain moisture in the skin.
Benefits
- Helps maintain skin hydration and moisture balance
- Supports skin barrier function as a natural amino acid
- May improve skin texture and softness
Science: Limited peer-reviewed data available for threonine as a direct skincare ingredient. The provided research focuses on threonine as part of BRAF protein kinase pathways in melanoma treatment and fibrosis research, which are not relevant to topical cosmetic use. Threonine is generally recognized as safe in skincare applications.
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Histidine is an amino acid that plays a key role in maintaining your skin's natural moisture barrier. In skincare, it supports the production of natural moisturizing factor (NMF)—compounds that help your skin retain water and stay hydrated.
Benefits
- Supports skin hydration and moisture retention
- Helps strengthen the skin barrier
- May provide antioxidant protection through carnosine production
Science: Histidine is a naturally occurring amino acid essential for human health. Research shows it is a precursor to filaggrin breakdown products that form the skin's natural moisturizing factor, a critical component of skin hydration and barrier function.
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Phenylalanine is an amino acid that, in its modified form (undecylenoyl phenylalanine), is used in skincare to help reduce the appearance of dark spots and uneven skin tone, particularly melasma. It works by interfering with melanin production in the skin.
Benefits
- May help reduce the appearance of dark spots and hyperpigmentation
- Potential support for melasma treatment as an adjuvant therapy
- Generally well-tolerated with minimal side effects
Science: Limited clinical evidence exists for topical phenylalanine derivatives in melasma treatment. A 2022 systematic review identified 2% undecylenoyl phenylalanine as a topical agent with less robust evidence compared to gold-standard treatments like hydroquinone and triple combination therapy, though no severe adverse effects were reported.
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Arginine is a naturally occurring amino acid that is a building block of proteins found in skin. In skincare products, it's used to support skin hydration and may help improve skin barrier function and elasticity.
Benefits
- Supports natural skin hydration
- Helps maintain skin barrier health
- May improve skin firmness and elasticity
Science: Arginine is a naturally occurring amino acid in human skin with a strong safety profile. Research shows it is a normal metabolite excreted by skin and is used in clinical diagnostics, indicating its natural presence and compatibility with skin biology.
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PCA (pyroglutamic acid) is a naturally occurring amino acid derivative that acts as a humectant, helping skin retain moisture. It's often used in skincare formulas to support hydration and skin barrier function.
Benefits
- Humectant that draws moisture into the skin
- Supports natural skin hydration
- Generally well-tolerated by most skin types
Science: PCA is a component of the skin's natural moisturizing factor (NMF) and has a long history of safe use in cosmetics. Research indicates manganese PCA may support hair follicle health and growth signaling pathways, though human skincare efficacy data remains limited.
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Sodium PCA is a naturally occurring humectant (moisture-attracting ingredient) that helps skin retain water and stay hydrated. It's a sodium salt of pyrrolidone carboxylic acid, a compound found naturally in healthy skin.
Benefits
- Draws moisture into the skin and helps maintain hydration
- Improves skin's natural moisture-retention ability
- Generally well-tolerated and safe for regular use
Science: A 2019 Cosmetic Ingredient Review Expert Panel assessment confirmed sodium PCA and related salts are safe in cosmetics at current use levels. Recent research shows sodium PCA concentrates effectively in the outermost skin layer (stratum corneum) where it provides hydration benefits.
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Sodium lactate is a salt derived from lactic acid that acts as a humectant and pH buffer in skincare products. It helps draw moisture into the skin and maintain the product's stability.
Benefits
- Humectant that attracts and retains water in the skin
- Helps maintain skin hydration and plumpness
- Gentle pH buffer that stabilizes formulations
Science: Limited peer-reviewed data available specifically for topical skincare use. The provided research focuses on medical applications (intravenous use in shock treatment) and cellular mechanisms unrelated to cosmetic skincare; these do not directly inform safety or efficacy for topical skin application.
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Fructose is a simple sugar naturally found in fruits and honey. In skincare products, it functions as a humectant—a moisture-binding ingredient that helps the skin retain water—and as a sweetener or preservative in formulations.
Benefits
- Humectant properties that help skin retain moisture
- Gentle sweetening agent in formulations
- Contributes to skin-conditioning effects when sourced from honey-based ingredients
Potential concerns
- May promote bacterial growth if used in high concentrations without proper preservation
- Can be sticky or uncomfortable in high amounts on skin
- Limited evidence for meaningful skincare benefits beyond basic humectancy
Science: Fructose is a component of honey, which has documented antimicrobial and humectant properties in dermatological applications. However, standalone fructose in skincare lacks substantial peer-reviewed research demonstrating unique benefits beyond standard humectant function.
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Glucose is a simple sugar that acts as a humectant in skincare products, meaning it helps draw moisture into the skin and keep it hydrated. It's a naturally occurring ingredient commonly found in honey and other botanical sources.
Benefits
- Hydration and moisture retention
- Humectant properties that help skin feel softer
- Generally well-tolerated by most skin types
Potential concerns
- May contribute to glycation (sugar binding to proteins) with prolonged exposure, potentially affecting skin aging
- Can feed acne-causing bacteria in susceptible individuals
- May cause irritation or sensitivity in some users
Science: Glucose is a key component of honey, which has established antimicrobial, emollient, and humectant properties in dermatological applications. However, the scientific literature raises concerns about sugar and glycation's role in skin aging, suggesting that while glucose provides short-term hydration benefits, excessive or chronic exposure may have negative effects on skin aging.
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Urea is a naturally occurring compound found in healthy skin that helps maintain hydration and skin barrier function. In skincare products, it works as a humectant at lower concentrations (drawing water into the skin) and can help remove dead skin cells at higher concentrations.
Benefits
- Hydrates and moisturizes dry skin
- Supports skin barrier function and integrity
- May reduce itching and discomfort from dry skin conditions
- Helps improve skin smoothness
- Can enhance penetration of other active ingredients when used in combination products
Potential concerns
- At high concentrations (>10%), may cause irritation or a slight stinging sensation in sensitive individuals
- Can increase skin sensitivity temporarily due to its exfoliating properties at higher doses
Science: Urea is a component of skin's natural moisturizing factor and has strong clinical evidence supporting its safety and efficacy. At concentrations of 10% or lower, it functions as a gentle moisturizer; at higher concentrations, it acts as a mild exfoliant and is recognized for improving conditions like xerosis, atopic dermatitis, and psoriasis.
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Polysorbate 20 is a mild emulsifier and solubilizer commonly used in skincare products to help mix oil and water-based ingredients together and keep them stable. It's also used to help dissolve fragrance and active ingredients evenly throughout a formula.
Benefits
- Helps create stable, smooth textures by blending incompatible ingredients
- Improves product consistency and shelf life
- Allows even distribution of active ingredients and fragrance
Potential concerns
- May cause irritation or allergic reactions in people with sensitive skin
- Can occasionally strip skin's natural oils if used in high concentrations
- Some individuals report sensitivity to polysorbates, though this is relatively uncommon
Science: The provided study examined polysorbate 20 as a formulation component in a clinical cancer treatment (vidutolimod), not as a cosmetic ingredient. Limited peer-reviewed data exists specifically evaluating polysorbate 20 safety in topical skincare; however, it is widely used globally and recognized as safe by major regulatory bodies (FDA, EU) at typical cosmetic concentrations (typically under 5%).
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Sodium chloride is common table salt, used in skincare products as a texture modifier, preservative, and to help balance formulations. In small amounts, it's generally well-tolerated by skin.
Benefits
- Helps preserve product stability
- Can enhance skin hydration when used in appropriate concentrations
- Improves product texture and consistency
Potential concerns
- High concentrations may irritate sensitive or compromised skin
- Excessive topical salt exposure can potentially disrupt skin barrier function
- May cause dryness or tightness in some individuals
Science: Sodium chloride is a naturally occurring electrolyte essential to skin physiology. Research indicates the skin actively regulates sodium levels through complex mechanisms involving the endothelium, immune cells, and lymphatics; however, peer-reviewed data specifically addressing topical sodium chloride in cosmetic formulations at typical use levels is limited.
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Pentylene glycol is a lightweight humectant—a ingredient that draws water into the skin to improve hydration and texture. It's commonly used in serums, sunscreens, and moisturizers as a preservative booster and skin-conditioning agent.
Benefits
- Improves skin hydration by attracting moisture
- Lightweight feel, absorbs quickly without heaviness
- Helps preserve product stability and extends shelf life
Potential concerns
- Rare contact allergy reported in sensitive individuals
- Emerging evidence suggests it may be an uncommon cosmetic allergen—if you have sensitive or reactive skin, patch test first
Science: Safety studies show a high margin of safety at standard use levels (87–671 in adults), with minimal skin penetration due to the ingredient's volatility. However, recent dermatological reports flag pentylene glycol as an emerging contact allergen in some individuals, warranting attention for those with sensitive skin.
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Sodium Hyaluronate Crosspolymer is a modified form of hyaluronic acid, a naturally occurring substance that holds moisture in skin. The crosslinked version is designed to stay on the skin's surface longer and provide sustained hydration, rather than absorbing deeply like standard hyaluronic acid.
Benefits
- Provides long-lasting hydration and moisture retention
- Creates a smoother skin feel and texture
- Helps plump fine lines temporarily through moisture
Science: Limited peer-reviewed data available for this specific crosslinked variant. Standard sodium hyaluronate has an extensive safety record as a humectant in skincare, and crosslinking is a common cosmetic chemistry technique to alter performance characteristics.
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Ethylhexylglycerin is a preservative and antimicrobial ingredient used to prevent bacterial growth and extend shelf life in skincare products. It's a multifunctional ingredient that helps keep formulations stable and free from contamination.
Benefits
- Prevents bacterial contamination in products
- Helps extend product shelf life
- Works synergistically with other preservatives for enhanced protection
Potential concerns
- May not be effective against all bacterial species (notably some Pseudomonas aeruginosa strains)
- Preservative-related sensitization possible in sensitive individuals, though uncommon
Science: Research shows ethylhexylglycerin has broad antimicrobial activity against many common cosmetic contaminants, though effectiveness varies by bacterial species. Studies demonstrate it can work synergistically with other preservative components to enhance biofilm inhibition.
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Chlorphenesin is a synthetic preservative used in skincare products to prevent bacterial and fungal growth, extending shelf life. It's a broad-spectrum antimicrobial agent that helps keep products safe from contamination during storage and use.
Benefits
- Prevents microbial contamination in skincare formulations
- Extends product shelf life
- Allows formulas to remain stable without refrigeration
Potential concerns
- May cause irritation to sensitive eyes and eye area when present in eye products
- Degrades under UV exposure, potentially creating more harmful breakdown products
- Limited long-term safety data in peer-reviewed literature
Science: Research shows chlorphenesin can be toxic to eye tissue cells at approved concentrations, particularly affecting meibomian glands. When exposed to sunlight, it breaks down into compounds like 4-chlorophenol that may be more ecotoxic than the original ingredient, though systemic absorption in skincare is typically minimal.
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Sodium Hydroxide is a strong alkaline chemical used in skincare products primarily as a pH buffer to neutralize acids and adjust the product's pH to safe levels for skin. It is not an active skincare ingredient and appears only in trace amounts in finished products.
Potential concerns
- In concentrated form, sodium hydroxide is caustic and can cause severe chemical burns; however, in cosmetic products it is diluted and pH-buffered to safe levels
- Undiluted or highly concentrated sodium hydroxide should never contact skin directly
Science: The provided research discusses sodium hydroxide only in a specialized medical context (10% solution for surgical cauterization of ingrown toenails), which is not relevant to cosmetic skincare use. In properly formulated skincare products, sodium hydroxide is used in minimal concentrations solely for pH adjustment and is considered safe by regulatory bodies including the FDA and EU.
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Xanthan gum is a natural thickener derived from fermented bacteria that helps give skincare products a smooth, gel-like texture. It stabilizes formulas and prevents ingredients from separating, while also helping products spread evenly on skin.
Benefits
- Creates smooth, pleasant texture
- Stabilizes emulsions and prevents separation
- Improves product spreadability and application
Science: Xanthan gum is an FDA-approved, anionic polysaccharide with a long history of safe use across food, pharmaceutical, and cosmetic industries since 1969. Its performance as a thickener and stabilizer is well-established in scientific literature, with no notable skin irritation concerns reported.
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Acetyl Hexapeptide-8 (also called Argireline) is a synthetic peptide designed to mimic how your muscles work, with the goal of reducing wrinkles caused by facial expressions. It's often marketed as a topical alternative to Botox, though it works differently and is applied directly to the skin rather than injected.
Benefits
- May help reduce the appearance of wrinkles and fine lines over time
- Can improve skin elasticity and hydration
- Affordable, over-the-counter alternative to injectable treatments
Potential concerns
- Limited ability to penetrate deep enough into skin to reach muscle junctions where it would theoretically work
- Its actual effectiveness at preventing muscle contractions when applied topically remains scientifically uncertain
- May cause mild irritation in sensitive individuals, though serious adverse effects are rare
Science: Recent research confirms acetyl hexapeptide-8 shows promise in reducing wrinkle depth and improving skin hydration in clinical studies, and interest in the ingredient has grown significantly since 2022. However, scientists note that the peptide's large molecular size and water-loving nature make it difficult for it to penetrate the skin barrier effectively, raising questions about whether it can actually reach and affect the neuromuscular junctions where wrinkle-causing muscle contractions occur.
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Palmitoyl Tetrapeptide-7 is a synthetic peptide (a short chain of amino acids) combined with palmitic acid, designed to signal skin cells to produce more collagen and support skin firmness. It's often marketed as a targeted anti-aging ingredient that may help reduce the appearance of fine lines and improve skin elasticity.
Benefits
- May support collagen production to improve skin firmness
- Potentially helps reduce the appearance of fine lines and wrinkles
- Generally well-tolerated by most skin types
Potential concerns
- Limited real-world testing data on effectiveness in typical skincare formulations
- May be irritating to very sensitive skin at high concentrations
- Peptides can be unstable and may lose potency depending on product formulation and storage
Science: Limited peer-reviewed data available for this specific ingredient. While peptides in general have shown promise in supporting skin health and collagen signaling, efficacy depends heavily on product formulation, concentration, and stability.
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Carbomer is a thickening agent and stabilizer that gives skincare products their gel-like texture. It helps create a smooth, spreadable consistency and can hold active ingredients in place on the skin for better absorption.
Benefits
- Creates a smooth, easy-to-apply gel texture
- Helps stabilize and thicken formulations
- Can improve how long active ingredients stay on the skin
- Allows better delivery of beneficial compounds into deeper skin layers
Potential concerns
- Can occasionally cause irritation or sensitivity in very reactive skin types
- Requires proper pH adjustment in formulations (formulators use this, not consumers)
Science: Research shows carbomer is commonly used as a gel base in advanced skincare delivery systems, including those designed for anti-inflammatory and healing treatments. Studies indicate it effectively works with active ingredients like nanoparticles and botanical extracts to improve their penetration and efficacy on skin.
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Allantoin is a naturally derived compound that helps calm and soothe irritated skin. It works by promoting healing and reducing inflammation, making it a popular choice in products designed for sensitive or reactive skin.
Benefits
- Reduces skin inflammation and irritation
- Supports the skin barrier function
- Promotes gentle healing of compromised skin
- Well-tolerated by sensitive skin types
Science: Allantoin ranks among the top three most-used active ingredients in pharmacy-grade sensitive skin products, alongside niacinamide and oat extract. Scientific evidence supports its anti-inflammatory mechanism and barrier-supporting action, though clinical studies specifically testing it on sensitive skin volunteers remain limited.
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Dimethyl isosorbide is a clear liquid solvent derived from sorbitol that helps dissolve and deliver other skincare actives into the skin more effectively. It works by enhancing the penetration of beneficial ingredients and improving product texture and stability.
Benefits
- Enhances penetration of active ingredients into skin
- Improves product stability and shelf life
- Lightweight solvent that feels comfortable on skin
Potential concerns
- Can cause irritation or sensitization in sensitive skin at high concentrations
- May increase skin penetration of other ingredients, which could be problematic if combined with irritating actives
Science: Dimethyl isosorbide is recognized as a penetration enhancer in cosmetic formulations. Research shows it has relatively low solubility for certain actives (such as piroctone olamine at 9.9 mg/mL), making it suitable for specific formulation strategies targeting epidermal delivery, though peer-reviewed safety and efficacy data in skincare is limited.
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Palmitoyl Tripeptide-1 (PT-1) is a peptide derived from amino acids that signals skin cells to boost collagen production. Research suggests it works particularly well when applied at night, aligning with your skin's natural repair cycle to support firmness and skin structure.
Benefits
- May promote collagen synthesis, particularly when applied at nighttime
- Could improve skin firmness and reduce the appearance of fine lines
- May enhance overall skin luminance and quality when used as part of a consistent routine
Science: A 2026 clinical trial (n=30) found that nightly PT-1 application synergistically improved collagen metabolism when combined with daytime baicalin, showing significant improvements in skin luminance (+16.29%), nasolabial fold depth (-36.35%), and firmness (+24.35%) over 8 weeks. The ingredient appears to work by boosting collagen synthesis during the skin's natural nighttime repair phase.
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Copper Tripeptide-1 is a small protein fragment combined with copper that helps support skin's natural repair processes. In skincare products, it's primarily used to help improve the appearance of scars and support skin firmness by encouraging healthy collagen production.
Benefits
- May help reduce the appearance of scars and improve skin texture
- May support skin firmness and elasticity
- May help normalize collagen production in healing skin
Science: Research shows copper tripeptide-1 reduces excessive collagen-related growth factors (TGF-beta1) in skin cells, which may help prevent over-scarring and excessive scar tissue formation. Clinical studies demonstrate efficacy in improving acne scar appearance when combined with complementary ingredients, though most evidence comes from in-vitro studies and single formulation trials rather than independent, large-scale human studies.
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Maltose is a natural sugar derived from grains like barley and corn. In skincare, it functions primarily as a humectant and stabilizing agent, helping products retain moisture and maintain their texture and shelf life.
Benefits
- Humectant that helps skin retain hydration
- Stabilizes cosmetic formulations
- Natural origin makes it suitable for gentler skincare
Science: Research shows maltose can support protein production in cosmetic biotechnology (including collagen synthesis) and acts as a metabolic nutrient in cellular systems. No safety concerns or skin irritation risks have been documented in peer-reviewed literature.
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Lactococcus Ferment Lysate is a fermented ingredient derived from Lactococcus bacteria (a type of lactic acid bacteria). It's created by breaking down bacterial cells to release beneficial compounds. In skincare, it's used for its potential to support skin barrier health and promote a balanced skin microbiome.
Benefits
- May support skin barrier function
- Potential prebiotic or microbiome-balancing effects
- Can provide hydration and skin-soothing properties
Science: Limited peer-reviewed data available for this specific ingredient. Fermented lysates from lactic acid bacteria are generally recognized as safe in cosmetics, though specific efficacy claims for Lactococcus Ferment Lysate in skincare require more clinical evidence.
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This is a synthetic peptide-based ingredient designed to target signs of aging, particularly fine lines and wrinkles. It works by mimicking natural skin-signaling molecules that may help improve skin firmness and reduce the appearance of expression lines.
Benefits
- May reduce the appearance of fine lines and wrinkles
- Designed to improve skin firmness
- Generally well-tolerated in formulations
Science: Limited peer-reviewed data available for this ingredient. It is a synthetic peptide compound used in anti-aging cosmetics, but robust clinical studies in published literature are minimal. Safety assessments are primarily based on ingredient composition and industry testing rather than extensive independent research.
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Analysis not yet available for this ingredient.
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Palmitoyl Tripeptide-38 is a synthetic peptide designed to support skin's natural repair processes. It works by signaling skin cells to maintain and strengthen the structural proteins that keep skin firm and smooth.
Benefits
- May reduce skin roughness and improve skin texture
- Supports skin firmness and elasticity
- May improve skin tone evenness and reduce redness
- Helps enhance radiance and reduce appearance of fine lines
Science: Two peer-reviewed clinical studies demonstrate that serums containing this peptide (at 5 ppm concentration) produced measurable reductions in skin roughness (8-9%) and improvements in skin tone homogeneity (8%) over 56 days when combined with vitamins C and E. Results showed good agreement between instrumental measurements and consumer perception of benefits.
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Analysis not yet available for this ingredient.
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Hydroxypropyl cyclodextrin is a helper ingredient that works like a tiny molecular cage, trapping other active ingredients to make them more stable, easier for skin to absorb, and less irritating. It's commonly used to improve how well beneficial compounds like antioxidants and soothing agents penetrate the skin.
Benefits
- Improves skin absorption of active ingredients
- Increases stability of sensitive or unstable actives
- Reduces potential irritation from encapsulated ingredients
- Enhances effectiveness of antioxidants and anti-inflammatory compounds
Science: Recent research shows hydroxypropyl cyclodextrin can enhance skin penetration of active ingredients by up to 3.5 times while simultaneously reducing irritation and improving stability. It functions as a delivery system that makes other skincare actives work better and gentler on skin.
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Acacia Senegal Gum, also known as gum arabic, is a natural thickening and film-forming ingredient derived from the acacia tree. It helps create texture in skincare products and can form a light protective layer on the skin.
Benefits
- Creates smooth texture and consistency in products
- Forms a light film on skin to help retain moisture
- Natural origin with long history of safe use
Potential concerns
- Some clinical evidence suggests potential for skin sensitization in sensitive individuals
- May cause contact urticaria (localized itching/hives) in rare cases
Science: Acacia Senegal Gum is recognized as safe based on extensive toxicity testing showing no acute, reproductive, developmental, or carcinogenic concerns. However, clinical testing identified some evidence of skin sensitization, and dose-response studies for sensitization are limited.
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