Ingredients
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Dimethicone is a silicone-based ingredient that forms a smooth, protective layer on your skin. It helps lock in moisture, creates a soft feel, and is commonly used in moisturizers and primers to improve product texture and skin hydration.
Benefits
- Improves skin hydration by creating a moisture-barrier layer
- Provides a smooth, silky feel to products and on skin
- Well-tolerated by sensitive and atopic (eczema-prone) skin
- Non-greasy alternative to heavier oils
Science: Clinical studies demonstrate dimethicone is safe and well-tolerated in children with atopic dermatitis from 12 months of age. Research shows moisturizers containing dimethicone effectively improve skin hydration in mild-to-moderate atopic dermatitis patients over 14 days.
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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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Palmitoyl Hexapeptide-12 is a self-assembling peptide—a short chain of amino acids attached to a fatty molecule—designed to penetrate skin layers and strengthen the skin barrier. It works by interacting with your skin's natural components to form reinforced structures that improve skin firmness and hydration.
Benefits
- May improve skin barrier strength and repair
- Supports skin hydration and moisture retention
- Potential anti-aging effects through skin firming
- Works with your skin's natural molecules rather than against them
Science: Recent 2025 research confirms Palmitoyl Hexapeptide-12 penetrates both outer and deeper skin layers, forming gel-like structures that strengthen the skin barrier and improve mechanical properties. Studies demonstrate it cooperates with native skin molecules to enhance hydration and repair, particularly after barrier damage, with no reported safety concerns identified.
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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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Tocopheryl acetate is a stable form of vitamin E, a fat-soluble antioxidant that helps protect skin from damage caused by free radicals and oxidative stress. It's commonly used in skincare products because it's more shelf-stable than other vitamin E forms and may help support the skin's natural barrier function.
Benefits
- Antioxidant protection against environmental damage
- Supports skin barrier health
- Stable ingredient with good shelf life in formulations
Science: Tocopheryl acetate is a well-established vitamin E ester that the body converts to free vitamin E for use. Research shows it functions as a lipid-soluble antioxidant; one recent study found it contributed to a moisturizer's beneficial effects on skin microbiota balance in atopic dermatitis models, though more direct clinical evidence on topical efficacy is limited.
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Hexylene glycol is a lightweight humectant and preservative booster used in skincare products to help retain moisture and improve product stability. It also enhances the penetration of other active ingredients into the skin.
Benefits
- Helps skin retain moisture
- Improves product texture and spreadability
- Enhances effectiveness of preservative systems
Potential concerns
- May cause mild irritation or redness in sensitive individuals (occurs in roughly 3% of eczema-prone skin)
- Potential for delayed allergic contact reactions in susceptible people, though this is uncommon
- Less irritating than propylene glycol under occlusion, but still worth avoiding if you have known sensitivities to glycols
Science: A 1989 study found hexylene glycol caused visible skin reactions in 2.8% of eczema patients at high concentrations (30-50%), with potential for delayed allergic sensitization in rare cases. It was less irritating than propylene glycol. One case report mentions hexylene glycol as a potential allergen in medical formulations, though reactions are uncommon at typical cosmetic concentrations.
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BHT (butylated hydroxytoluene) is a synthetic antioxidant used in skincare products to prevent oils and other ingredients from oxidizing and going rancid. It's used at very low concentrations (0.0002% to 0.5%) to extend shelf life.
Benefits
- Prevents product degradation and extends shelf life
- Keeps formulations stable over time
- Allows use of beneficial oils without them spoiling
Potential concerns
- Can cause skin irritation or allergic reactions in sensitive individuals at higher concentrations
- May cause mild contact sensitization in some people
- Minimal systemic absorption when applied to skin, but oral ingestion studies show potential liver and kidney effects at high doses
Science: The Cosmetic Ingredient Review Expert Panel concluded BHT is safe as used in cosmetic formulations at typical concentrations. When applied to skin, BHT remains largely in the skin with minimal systemic absorption, unlike oral exposure which showed some toxic effects in animal studies at high doses.
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Disodium EDTA is a chelating agent that binds to metals and minerals in skincare formulations, helping to preserve product stability and extend shelf life. It's used in small amounts (typically under 2%) to prevent unwanted chemical reactions that could degrade the formula.
Benefits
- Stabilizes cosmetic formulations by binding trace metals
- Extends product shelf life and maintains efficacy
- Allows other skincare ingredients to work more effectively
Potential concerns
- May increase skin penetration of other ingredients by chelating calcium in the skin barrier—only a concern if combined with potentially harmful substances
- Not absorbed through skin in normal use, but inhalation from sprays was identified as a theoretical concern in safety assessments
Science: The Cosmetic Ingredient Review Expert Panel confirmed safety in 2023 based on standard use concentrations. Clinical studies show no skin absorption; however, it can affect how other chemicals penetrate the skin, so formulators must account for this when combining with other actives.
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Potassium sorbate is a preservative used in skincare products to prevent the growth of mold, yeast, and some bacteria, helping extend shelf life. It's a salt derived from sorbic acid and is commonly used as a gentler alternative to stronger chemical preservatives.
Benefits
- Prevents microbial contamination and mold growth
- Generally considered milder than some other preservatives like benzalkonium chloride
- Allows products to remain effective longer without refrigeration
Potential concerns
- May cause irritation or allergic contact dermatitis in sensitive individuals
- Not suitable for preservative-free formulations
- Limited effectiveness against some bacteria compared to stronger preservatives
Science: Clinical research suggests potassium sorbate is less damaging to delicate tissues than benzalkonium chloride, making it a preferred alternative preservative in sensitive applications like eye products. However, peer-reviewed safety data specific to topical skincare use in the general population is limited.
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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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Aminomethyl Propanol (AMP) is a pH buffer and preservative used in skincare formulations to maintain product stability and prevent microbial growth. It helps keep products at a safe pH level while extending shelf life.
Benefits
- Helps preserve product and prevent bacterial contamination
- Balances pH to prevent irritation
- Allows brands to reduce reliance on traditional preservatives
Potential concerns
- May interact with amino acids naturally present in skin (taurine), potentially affecting biological function—though significance in topical skincare remains unclear
- Can cause contact dermatitis or irritation in sensitive individuals
- Limited safety data for use in products for infants and very sensitive skin
Science: Recent research (2024) suggests AMP forms hydrogen bonds with taurine, an important amino acid in the body, which could affect its biological functions—though this was studied in controlled laboratory conditions and the relevance to topical skincare exposure is not yet established. AMP is increasingly used as a preservative alternative in cosmetics, including infant formulations, but dermatologists note it may pose irritation risks for sensitive populations.
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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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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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C12-15 Alkyl Benzoate is a lightweight emollient (skin softener) derived from benzoic acid and plant-based alcohols. It's commonly used in sunscreens and moisturizers to create a smooth texture, help dissolve UV filters, and improve how the product feels on skin.
Benefits
- Provides a silky, non-greasy feel
- Helps dissolve and stabilize UV filters in sunscreens
- Lightweight emollient that conditions skin without heaviness
Science: Research shows C12-15 Alkyl Benzoate is effective as a sunscreen emollient, though studies indicate that more polar (water-loving) emollients like Dibutyl Adipate may provide slightly better UVA protection. The ingredient has a good safety profile in cosmetic formulations.
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Squalane is a lightweight, skin-identical oil derived from squalene (a natural component of human sebum). It absorbs easily into the skin to lock in moisture and create a smooth, soft feel without leaving a greasy residue.
Benefits
- Hydrates and moisturizes skin
- Mimics skin's natural oils for better compatibility
- Lightweight emollient that doesn't clog pores
- Antioxidant properties
- Well-tolerated by most skin types
Science: The Cosmetic Ingredient Review Expert Panel confirmed squalane is safe for cosmetic use at typical concentrations (2023). Research demonstrates skin hydrating and emollient activity, and squalane is naturally present in human sebum at ~13%, making it biocompatible with skin.
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Caprylic/Capric Triglyceride is a lightweight oil derived from coconut that acts as an emollient and helps formulations blend smoothly. It softens skin and reduces water loss by creating an occlusive barrier on the skin's surface.
Benefits
- Improves skin hydration and reduces transepidermal water loss (TEWL)
- Lightweight, non-greasy feel compared to heavier oils
- Helps deliver other active ingredients deeper into the skin
- Smooth, silky texture in skincare formulations
Science: Research shows that emulsions containing 15% caprylic/capric triglyceride significantly increase skin hydration and reduce water loss in healthy subjects. The ingredient is also used as an effective carrier oil in nanoemulsions to enhance penetration of active compounds into skin.
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Lactic acid is a mild chemical exfoliant that works by gently dissolving the bonds between dead skin cells on the surface, helping to slough them away. It's an alpha hydroxy acid (AHA) derived from milk fermentation and is gentler than stronger exfoliants, making it suitable for sensitive skin types.
Benefits
- Gently exfoliates dead skin cells for a smoother texture
- Improves skin radiance and brightness
- Helps reduce the appearance of fine lines and uneven skin tone
- Supports skin hydration by improving moisture absorption
Potential concerns
- Can cause redness, stinging, or irritation, especially at higher concentrations or on sensitive skin
- Increases sun sensitivity — daily SPF is essential when using
- May irritate active acne or compromised skin barrier
- Can cause dryness if overused or not followed with adequate moisturizer
Science: Lactic acid is widely recognized as an effective gentle exfoliant for improving skin texture and hydration. It has a longer history of safe topical use in dermatology compared to stronger AHAs, though it requires proper formulation (typically 5-12% for leave-on products) and concurrent sun protection to minimize irritation risk.
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Stearic acid is a naturally occurring fatty acid commonly derived from plant or animal sources. In skincare products, it functions as an emollient and emulsifier, helping to soften skin, improve product texture, and stabilize formulations by allowing oil and water to mix together.
Benefits
- Softens and moisturizes skin by forming a protective barrier
- Improves product texture and stability
- Helps other active ingredients penetrate the skin more effectively
Potential concerns
- May cause mild irritation or sensitivity in people with very sensitive skin
- Can leave a slight waxy residue if used in high concentrations
Science: Research indicates stearic acid acts as a permeation enhancer, potentially improving how active ingredients cross the skin barrier. It is well-established in cosmetic formulation design and has a strong safety history in topical products.
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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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Limonene is a natural fragrance compound found in citrus oils and other plants. It's used in skincare products primarily to provide a fresh, lemon-like scent and may have mild preservative properties.
Benefits
- Provides natural fragrance
- May help preserve products
- Derived from natural plant sources
Potential concerns
- Can cause skin irritation or allergic contact dermatitis in sensitive individuals
- May oxidize over time, potentially becoming more irritating
- Inhalation of high concentrations may pose concerns; use caution with products prone to aerosolization
Science: Limonene is a widely used fragrance component in cosmetics derived from essential oils. However, research indicates that monoterpenes like limonene can exhibit hepatotoxic properties and penetrate skin readily; while cosmetic concentrations are typically low, individuals with sensitive skin or fragrance allergies should exercise caution.
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Adenosine is a naturally occurring compound found in all living cells that plays a role in skin cell energy production and communication. In skincare, it's used to help support skin barrier function and may promote a smoother, more resilient complexion.
Benefits
- Supports skin barrier strength and integrity
- May help reduce the appearance of fine lines and wrinkles
- Promotes skin cell energy metabolism and repair
Science: Research indicates adenosine and related compounds (like cyclic adenosine monophosphate) regulate skin barrier formation and epidermal differentiation. While direct clinical studies on topical adenosine in skincare are limited, the ingredient's role in cellular energy and barrier maintenance is well-established in dermatological literature.
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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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Jojoba seed oil is a natural oil extracted from jojoba plant seeds that closely mimics the skin's natural sebum. It's commonly used in skincare to moisturize, balance oil production, and improve skin texture without leaving a heavy residue.
Benefits
- Lightweight moisturization
- Helps balance oily and dry skin
- Rich in vitamin E and antioxidants
- Generally non-comedogenic (unlikely to clog pores)
Potential concerns
- Rare allergic reactions in sensitive individuals
- May not be suitable for very acne-prone skin in high concentrations
Science: Jojoba oil has a long history of safe use in cosmetics and is well-tolerated by most skin types. Limited peer-reviewed data available for this specific ingredient, but extensive industry experience and anecdotal evidence support its safety and efficacy as a natural moisturizer.
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Cholesterol is a naturally occurring fatty substance that is a key component of your skin's outermost barrier. In skincare products, it works alongside ceramides and fatty acids to help strengthen this barrier, keeping moisture in and irritants out.
Benefits
- Strengthens skin barrier function
- Helps retain skin hydration
- Works synergistically with ceramides and fatty acids for optimal barrier repair
Science: Cholesterol is a natural and essential component of the stratum corneum (outer skin layer), present in roughly equal amounts to ceramides and free fatty acids. Research shows that topical formulations combining cholesterol with ceramides and fatty acids in physiological ratios effectively support barrier function and can improve disturbed skin conditions.
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Grapefruit peel oil is a fragrant essential oil extracted from the peel of grapefruit citrus fruit. In skincare, it's used primarily for its fresh scent and potential antioxidant properties, though its skincare benefits are largely cosmetic rather than clinically proven.
Benefits
- Antioxidant protection from vitamin C and limonene
- Fresh, uplifting fragrance
- May provide mild antibacterial properties
Potential concerns
- Can increase skin sensitivity to sunlight (photosensitivity) in some individuals
- May cause irritation or contact dermatitis in sensitive skin
- Essential oils can be irritating if used in high concentrations
Science: Limited peer-reviewed data available for this ingredient in skincare formulations. Grapefruit peel oil contains limonene and other terpenes with known antioxidant properties, but efficacy in cosmetic concentrations is not well-established. Citrus oils are known photosensitizers in certain individuals.
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Tribehenin is a natural oil derived from behenic acid (a fatty acid) and glycerin. It works as an emollient and occlusive agent, helping to soften skin and lock in moisture by forming a protective layer on the skin's surface.
Benefits
- Moisturizes and conditions skin
- Helps reduce water loss from skin
- Creates a smooth, soft skin feel
Science: The Cosmetic Ingredient Review Expert Panel assessed tribehenin as part of a broader safety evaluation of glyceryl triesters and concluded these ingredients are safe for use in cosmetics. Dermal absorption is minimal, irritation risk is low, and no sensitization or photosensitization concerns were identified in animal testing.
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Cetearyl alcohol is a waxy, fatty alcohol derived from vegetable or petroleum sources that acts as an emulsifier and thickener in skincare products. It helps blend oil and water-based ingredients together and gives creams and lotions their smooth, spreadable texture.
Benefits
- Stabilizes emulsions to prevent separation of oil and water
- Thickens and improves texture of creams and lotions
- Creates a smooth, non-greasy feel on skin
Potential concerns
- Rare allergic contact dermatitis reported in sensitive individuals
- May cause localized irritation or allergic reactions in patch-tested cases
Science: Cetearyl alcohol is widely used as an emulsifier in topical formulations and generally has a good safety profile. However, multiple case reports document allergic contact dermatitis in susceptible individuals, suggesting it can act as a contact allergen in rare cases. It does not significantly penetrate skin and primarily remains in the formulation.
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Geraniol is a fragrant compound found naturally in essential oils, particularly rose geranium. It's used in skincare products primarily to provide a pleasant floral scent and may contribute mild antibacterial and antifungal properties.
Benefits
- Pleasant floral fragrance
- Potential antibacterial activity
- Potential antifungal activity
Potential concerns
- May cause skin irritation or allergic contact dermatitis in sensitive individuals
- Natural origin does not guarantee safety for all users
Science: Geraniol is recognized as a fragrance component from essential oils with reported antibacterial and antifungal potential, though clinical validation of these benefits in skincare formulations is limited. The ingredient has historical use in traditional remedies, but most specific skincare efficacy claims lack robust scientific validation.
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Ascorbyl palmitate is a stabilized form of vitamin C (ascorbic acid) that's designed to be more shelf-stable and easier to formulate into skincare products than pure vitamin C. It works as an antioxidant to help protect skin from environmental damage and may support anti-aging benefits.
Benefits
- Antioxidant protection against free radicals
- May help reduce appearance of fine lines and support skin firmness
- Can help even out skin tone and reduce hyperpigmentation
- More stable formulation option compared to L-ascorbic acid
Potential concerns
- Less potent than pure L-ascorbic acid at the same concentration
- Penetration into deeper skin layers is limited without specialized delivery systems
- May cause mild irritation in sensitive skin at higher concentrations
Science: Recent research (2024) shows that ascorbyl palmitate has good antioxidant and anti-aging properties similar to L-ascorbic acid. When encapsulated in liposomes, skin penetration improved significantly (1.2–1.3 fold increase), suggesting that standard formulations may have limited effectiveness unless specifically optimized for absorption.
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Macadamia ternifolia seed oil is a lightweight, nutrient-rich plant oil extracted from macadamia nuts. It's used in skincare to moisturize and soften the skin while absorbing relatively quickly without leaving a greasy residue.
Benefits
- Moisturizes and hydrates skin
- Rich in fatty acids that support skin barrier function
- Absorbs well without heavy residue
- May help improve skin texture and softness
Science: Limited peer-reviewed data available for this ingredient. Macadamia oil is generally recognized as safe for topical use and is well-tolerated by most skin types, though individual sensitivities to tree nut oils are possible in rare cases.
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Sodium PCA is a natural humectant—a moisture-binding ingredient derived from pyrrolidone carboxylic acid—that helps skin attract and retain water. It works by drawing hydration into the outer layers of skin, making it a gentle, well-tolerated moisturizing agent.
Benefits
- Hydrates and moisturizes skin by binding water to the stratum corneum
- Helps improve skin softness and smoothness
- Well-tolerated by most skin types, including sensitive skin
Science: The Cosmetic Ingredient Review Expert Panel (2019) concluded that sodium PCA is safe for use in cosmetics at current concentrations and practices. Research confirms it localizes effectively in the outer skin layer where it functions as a humectant, with no significant safety concerns identified in peer-reviewed assessments.
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Isopropyl myristate is a lightweight oil derived from coconut and petroleum sources. It's commonly used in skincare products as an emollient and penetration enhancer to help soften skin and improve the absorption of other ingredients.
Benefits
- Softens and smooths skin texture
- Lightweight, non-greasy feel
- Helps other active ingredients penetrate the skin more effectively
Potential concerns
- May cause irritation or sensitivity in individuals with very reactive or compromised skin barriers
- Can be comedogenic (pore-clogging) for some acne-prone individuals
- May trigger reactions in those sensitive to fragrance-free formulations that still contain this ingredient
Science: Research confirms isopropyl myristate is an effective permeation enhancer in topical formulations, improving skin penetration of active ingredients. It has a long history of safe use in cosmetics and pharmaceuticals, though individual sensitivity varies.
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Hexyl cinnamal is a fragrance ingredient used in cosmetic and skincare products to provide a pleasant scent. It's a synthetic aromatic compound commonly found in a wide range of beauty products.
Benefits
- Adds fragrance and scent appeal to products
Potential concerns
- May cause allergic contact dermatitis or skin sensitization in sensitive individuals
- Listed as a potential skin sensitizer, though human reactions are relatively uncommon at typical consumer exposure levels
Science: Hexyl cinnamal is classified as a weak skin sensitizer based on its chemical structure and animal testing data. However, human experience shows it has a low capacity to trigger allergic reactions under normal consumer use conditions. It is commonly detected in cosmetic products (approximately 29% of surveyed items) and remains permitted in cosmetics within regulatory limits.
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Ceramide NG is a naturally-derived lipid (fat) that mimics ceramides found in your skin's outer layer. It helps repair and strengthen your skin barrier, which reduces water loss and keeps skin hydrated and protected.
Benefits
- Strengthens skin barrier function
- Reduces transepidermal water loss (TEWL)
- Improves skin hydration and softness
- Helps soothe dry, irritated, or sensitive skin
Science: Ceramides are well-established in skincare science as key structural components of the skin barrier. While limited peer-reviewed data exists specifically for Ceramide NG, the broader ceramide ingredient class has strong evidence supporting barrier repair and hydration benefits in numerous clinical studies.
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Ceteareth-20 is a gentle emulsifier derived from natural plant oils and coconut. It helps bind water and oil together in creams and lotions, creating a smooth, stable texture that absorbs well into skin.
Benefits
- Creates stable, smooth-textured formulations
- Helps products absorb evenly into skin
- Allows active ingredients to penetrate effectively
Science: Research shows that emulsifier choice, including ceteareth-20-containing systems, significantly affects how active ingredients like sunscreens penetrate and absorb into skin. The ingredient has a well-established safety profile in cosmetics and is widely used in dermatological formulations.
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Polyquaternium-51 is a synthetic polymer used primarily as a conditioning agent and film-former in skincare and haircare products. It helps smooth the skin surface, improve texture feel, and can provide a light moisturizing effect by forming a protective barrier.
Benefits
- Improves skin smoothness and texture
- Provides light conditioning and hydration
- Enhances product feel and spreadability
Science: Limited peer-reviewed data available for this ingredient. Polyquaternium compounds are generally recognized as safe in cosmetics at typical use levels, though specific safety studies on Polyquaternium-51 are not widely published in dermatological literature.
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