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.
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.
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.
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.
Tin Oxide is a mineral powder used in cosmetics primarily as a colorant and opacifying agent to create a smooth, matte finish in powders and foundations. It's an inert mineral that sits on top of the skin rather than being absorbed.
Benefits
Provides opacity and coverage in powder formulations
Creates a matte or satin finish
Inert and unlikely to cause irritation in topical skincare use
Potential concerns
Inhalation of powder particles should be avoided; inhaling tin oxide dust in industrial settings has been linked to lung concerns, though cosmetic powder use is a different exposure route
No significant skin or eye irritation reported in normal cosmetic use
Science: The available research focuses on occupational inhalation hazards in industrial manufacturing rather than cosmetic use on skin. Tin oxide is poorly soluble and remains on the skin surface, making systemic absorption unlikely from topical application. Limited peer-reviewed data specifically addresses safety in finished skincare products.
Synthetic fluorphlogopite is a mineral-derived ingredient made from magnesium silicate. It works as a bulking agent and thickener in cosmetic formulas, helping to create the right texture and consistency in products like foundations, powders, and creams.
Benefits
Thickens and stabilizes product texture
Improves spreadability and application
Provides a smooth, even finish
Science: The Cosmetic Ingredient Review Expert Panel evaluated synthetic fluorphlogopite and concluded it is safe for use in cosmetics at typical concentrations. The ingredient has a well-established safety profile similar to other magnesium silicates used in skincare.
Sodium cocoyl isethionate (SCI) is a gentle, plant-derived cleanser made from coconut oil. It removes dirt and oil from skin while being milder than many other cleansing ingredients, making it popular in gentle facial cleansers and beauty bars.
Benefits
Effectively cleanses without stripping skin
Gentler on skin barrier than stronger surfactants like sodium lauryl sulfate
Well-tolerated by most skin types, including sensitive skin
Biodegradable and derived from natural sources
Potential concerns
Can cause mild irritation, redness, or dryness in sensitive individuals at higher concentrations
May cause transient increases in water loss from skin with single exposure, though recovery is relatively quick
Science: Research confirms SCI is significantly milder than many alternative surfactants because its larger molecular structures are less likely to penetrate deep into skin layers. It has been safely used in skincare products for over 30 years, though individual sensitivity varies.
Sodium Stearate is a salt derived from stearic acid (a natural fatty acid) that works as an emulsifier and thickening agent in skincare products. It helps bind oil and water together and gives formulations a stable, gel-like texture.
Benefits
Creates stable emulsions that keep products from separating
Thickens and improves texture of gels and creams
Helps active ingredients penetrate skin more effectively when used in advanced formulations
Science: Research demonstrates Sodium Stearate is an effective emulsifier and stabilizer in topical delivery systems, with studies showing it safely supports high entrapment efficiency in nanoemulsion and liposome formulations without adverse effects on cell viability at typical use concentrations.
Charcoal powder is a finely ground form of activated charcoal, a porous carbon material traditionally used for its absorbent properties. In skincare, it's marketed as a pore-cleansing and detoxifying ingredient, though its actual efficacy for skincare purposes is limited compared to established alternatives.
Benefits
May help absorb excess oil and surface impurities on skin
Gentle exfoliating texture when used in powder or mask formulations
Generally well-tolerated by most skin types when used occasionally
Potential concerns
Can roughen and damage skin surface with repeated use, similar to abrasive scrubs
May disrupt the skin barrier and alter surface texture if overused
Claims of 'detoxification' are largely marketing; skin has its own natural detox mechanisms
No strong evidence it outperforms gentler, established skincare ingredients
Science: Research on activated charcoal in skincare is limited. Studies on dental applications show charcoal can roughen and alter surface properties, raising concerns about similar effects on facial skin. Evidence does not support superior efficacy compared to established alternatives like chemical exfoliants or proven pore-cleansing ingredients.
Sodium Lauroyl Methyl Isethionate is a mild, plant-derived cleansing agent (surfactant) commonly used in gentle face washes, body cleansers, and shampoos. It removes oil and dirt from skin while being less harsh than many traditional detergents, making it popular in products designed for sensitive skin.
Benefits
Effective at removing oil and makeup without over-stripping skin
Milder and gentler than sulfates like SLS, reducing irritation risk
Creates a pleasant lather and texture in cleansing products
Potential concerns
May cause mild irritation or dryness in very sensitive individuals at high concentrations
Can disrupt skin barrier if used excessively or in very frequent cleansing
Science: Limited peer-reviewed data available for this ingredient. It is widely used in cosmetics and regarded as a gentler alternative to sodium lauryl sulfate based on industry experience and safety assessments, though formal clinical studies are sparse.
