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.
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.
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.
2-Hexanediol is a humectant and preservative booster commonly used in skincare products to help retain moisture and extend shelf life. It works by drawing water into the skin while also enhancing the effectiveness of other preservatives, allowing brands to use lower amounts of traditional preservatives.
Benefits
Hydrates and moisturizes skin by drawing in water
Helps preserve products with lower preservative levels
Works synergistically with other skincare ingredients like niacinamide
Potential concerns
May cause cell viability concerns at concentrations above 1.0% in laboratory studies
Limited real-world safety data in humans at typical skincare concentrations (usually 2-5%)
Potential environmental concern if released into water systems
Science: While 2-hexanediol is widely used as a preservative substitute for parabens, recent cytotoxicity studies raise questions about safety at concentrations commonly found in skincare products (>2%). However, these findings are from laboratory cell studies and may not directly translate to human skin application. Further human safety studies are needed to confirm real-world risk.
Niacinamide is an active form of vitamin B3 that works within your skin's cells to strengthen the barrier, reduce inflammation, and regulate oil production. It's a water-soluble ingredient that's been shown to have multiple benefits across different skin concerns, from sensitivity to aging.
Benefits
Reduces redness and calms irritation
Minimizes pore appearance and controls excess oil
Supports skin barrier function and hydration
Brightens skin tone and evens complexion
Has anti-aging properties and protects against environmental damage
Science: Niacinamide is well-tolerated and safe across diverse skin types with strong clinical evidence supporting its use for acne, dermatitis, and general skin health. Research shows it works by regulating inflammation at the cellular level and protecting skin barrier integrity, with proven efficacy in concentrations commonly found in cosmetic products.
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.
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.
Hydroxyacetophenone is a naturally derived compound with antioxidant and antimicrobial properties. It's used in skincare products to help protect skin from environmental stress and maintain product freshness.
Benefits
Antioxidant protection against free radicals
Antimicrobial and antiseptic properties
May help preserve product stability
Science: Research shows hydroxyacetophenone has demonstrated antioxidant, antibacterial, and antiseptic activities in cosmetic and pharmaceutical applications. However, peer-reviewed data specifically evaluating its safety profile and efficacy in topical skincare products for consumers is limited.
Sodium Polyacryloyldimethyl Taurate is a synthetic polymer used primarily as a thickening and stabilizing agent in skincare formulas. It helps create a smooth texture and keeps product ingredients evenly distributed without separating.
Benefits
Creates smooth, even product texture
Improves formula stability
Helps maintain consistent product performance over time
Science: Limited peer-reviewed data available for this ingredient. It is a synthetic polymer approved for use in cosmetics by major regulatory bodies (including the FDA and EU) and is generally recognized as safe at typical usage levels in skincare products.
