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.
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.
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.
Sodium citrate is a salt derived from citric acid that acts as a pH buffer and preservative in skincare products. It helps stabilize formulations and maintain skin compatibility by regulating acidity levels.
Benefits
Helps maintain optimal pH balance in skincare formulas
Preservative that extends product shelf life
Gentle and well-tolerated by most skin types
Science: Sodium citrate is recognized as safe for topical use in cosmetics and has a long history of food and pharmaceutical applications. The research provided relates to its use as an anticoagulant in medical settings and as a buffering agent in sports nutrition, demonstrating its established safety profile across multiple industries.
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.
Propanediol is a lightweight humectant—a molecule that draws water into the skin to keep it hydrated. It's also used in cosmetic formulations as a solvent and preservative booster, helping products stay stable and feel smooth on the skin.
Benefits
Hydrates and moisturizes the skin
Improves product texture and spreadability
Helps preserve formulations naturally
Science: Propanediol can be produced through bio-based fermentation (from glycerol using microorganisms), making it an environmentally friendly alternative to traditional chemical synthesis. It is widely recognized as safe in cosmetic and food applications, with established use as both a humectant and preservative enhancer.
Panax Ginseng Root Extract is a plant-derived ingredient made from the roots of the ginseng plant, traditionally used in skincare for its antioxidant properties. It contains active compounds that may help protect skin from environmental damage and support a more even skin tone.
Benefits
Antioxidant protection against free radicals
May help reduce dark spots and melanin production for more even skin tone
Supports skin's natural defense mechanisms
Science: Research shows ginseng root extract enhances antioxidant enzymes in skin and reduces lipid peroxidation. Studies indicate vanillic acid, a key component in ginseng extract, inhibits melanin production through specific cellular pathways, supporting its use in brightening skincare products.
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.
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.
Ascorbyl Glucoside is a stable form of vitamin C that's been chemically modified to last longer in skincare products. Once absorbed into the skin, your body converts it into active vitamin C, which helps brighten skin tone, reduce the appearance of dark spots, and support overall skin health.
Benefits
Helps fade dark spots and uneven pigmentation (solar lentigos)
Brightens overall skin tone and improves radiance
More stable than standard vitamin C, so it stays effective longer in products
Antioxidant protection against environmental damage
Science: Clinical research demonstrates that ascorbyl glucoside-arginine complex significantly reduced pigmentation in sun spots after 24 weeks of twice-daily use, with visible lightening effects and no reported adverse effects or unwanted skin bleaching. The ingredient is well-tolerated and considered a safe, effective alternative to less stable vitamin C forms.
Isoceteth-20 is a gentle, plant-derived emulsifier and surfactant that helps blend water and oil-based ingredients in skincare formulas. It's commonly used in creams and lotions to create a stable, smooth texture that absorbs easily into skin.
Benefits
Helps stabilize skincare formulas
Improves texture and spreadability
Supports delivery of active ingredients into skin layers
Science: Research shows isoceteth-20 effectively helps deliver antioxidant compounds (like idebenone) into the upper layers of skin without causing permeation beyond the epidermis, making it a safe choice for targeting skincare actives where they're needed. It is classified as a non-ionic emulsifier with a well-established safety profile in cosmetics.
Sphingomonas Ferment Extract is a fermented bacterial ingredient that acts as a skin-conditioning agent and potential immune booster. It's created by fermenting Sphingomonas bacteria and is used in skincare to support the skin barrier and promote a healthy complexion.
Benefits
May support skin barrier function
Potential anti-inflammatory properties
Could help improve skin resilience
Science: Limited peer-reviewed data available for this ingredient. Fermented bacterial extracts are generally recognized as safe in cosmetics, though specific efficacy and mechanism studies for Sphingomonas Ferment Extract are not well-documented in published literature.
