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.
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.
Resveratrol is a natural antioxidant compound found in grapes, berries, and red wine. In skincare, it works to neutralize free radicals caused by UV damage and environmental stress, helping to protect skin from premature aging and maintain overall skin health.
Benefits
Antioxidant protection against UV damage and environmental stressors
May help reduce signs of photoaging (sun damage)
Supports skin cell repair and regeneration
Science: Research indicates resveratrol is effective as a topical cosmeceutical for treating photodamaged skin, with evidence ranging from high-quality Level I to Level II studies. It works synergistically with other antioxidants to neutralize free radicals and repair environmentally damaged skin cells.
Polyglutamic acid (γ-PGA) is a naturally-derived, water-soluble polymer that acts as a humectant and skin conditioning agent. It helps attract and retain moisture in the skin while supporting the delivery of other active ingredients.
Benefits
Hydration and moisture retention
Skin conditioning and smoothness
Potential antioxidant support when paired with other compounds
Biocompatible and environmentally friendly
Science: Polyglutamic acid is recognized as a biocompatible, water-soluble polymer with good safety profile across cosmetic, food, and medical applications. Recent research demonstrates its effectiveness as a nanoparticle delivery system for active ingredients, enhancing stability and penetration of skincare actives.
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.
Phenethyl alcohol is a naturally occurring organic compound commonly used in skincare products as a preservative and fragrance ingredient. It helps extend shelf life while contributing a subtle floral aroma to formulations.
Benefits
Natural preservative properties that help prevent microbial growth
Mild fragrance contribution with a pleasant floral scent
Generally well-tolerated by most skin types
Potential concerns
Potential skin irritation in sensitive individuals at higher concentrations
May cause allergic contact dermatitis in fragrance-sensitive people
Science: Phenethyl alcohol is recognized as a safe aroma compound naturally produced during fermentation processes and has established applications in cosmetics. Limited peer-reviewed dermatological safety data is available; safety profile is primarily established through historical use and regulatory approval rather than extensive clinical skincare studies.
Ferulic acid is a natural antioxidant compound that protects skin from free radical damage caused by UV light, pollution, and environmental stress. It works by neutralizing harmful molecules and boosting your skin's own protective enzymes, helping to prevent signs of aging and uneven skin tone.
Benefits
Antioxidant protection against free radicals and environmental damage
May help reduce signs of photoaging and UV-related skin damage
Can help even out skin tone and reduce hyperpigmentation
Anti-inflammatory properties
May support skin barrier health by protecting collagen and elastin
Potential concerns
Stability concern: ferulic acid oxidizes quickly when exposed to air or light, which can reduce its effectiveness over time
Limited data on long-term use in cosmetics; most research is preliminary
Rare sensitivity possible, though toxicity is considered low
Science: Research confirms ferulic acid is a potent free radical scavenger with protective effects on skin structures like collagen and fibroblasts, and is recognized as an effective photoprotective and skin-brightening agent. However, its rapid oxidation in formulations limits practical effectiveness, and most human clinical data remains limited compared to established ingredients like vitamin C.
Tremella Fuciformis Polysaccharide is a natural carbohydrate extracted from white jelly mushroom (snow fungus) that forms a gel-like substance in skincare products. It works primarily as a humectant, drawing moisture into the skin, while also providing anti-inflammatory and skin-soothing properties.
Benefits
Hydrates and moisturizes skin by attracting water
May reduce inflammation and soothe irritated skin
Supports skin barrier function and elasticity
Gentle, plant-derived ingredient suitable for sensitive skin
Science: Research demonstrates that Tremella Fuciformis Polysaccharides have anti-inflammatory properties and promote skin healing through collagen deposition and cell proliferation. The ingredient has been safely used in traditional medicine for centuries and shows no reported irritancy or toxicity concerns in cosmetic applications.
Soybean sterols are plant-derived compounds extracted from soybean oil that work as natural emollients and skin conditioning agents. They help soften and smooth the skin while supporting the skin's natural barrier function.
Benefits
Moisturizes and softens skin
Supports skin barrier health
Natural plant-based alternative to synthetic conditioning agents
Science: Limited peer-reviewed data available for this specific ingredient in skincare applications. Plant sterols generally have a strong safety history in cosmetics and are well-tolerated by most skin types.
