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.
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.
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.
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.
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.
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.
Zinc oxide is a mineral UV filter that sits on top of your skin to physically block both UVA and UVB rays from reaching your skin. It's one of the few sunscreen actives recognized as safe and effective by the FDA, and it doesn't get absorbed into your bloodstream.
Benefits
Provides broad-spectrum UV protection (blocks both UVA and UVB rays)
Mineral/physical blocker — doesn't absorb into skin, making it suitable for sensitive skin and safe during pregnancy
Photostable — doesn't degrade in sunlight
Generally well-tolerated with low risk of irritation or allergic reaction
Potential concerns
Can leave a white cast on skin, especially at higher concentrations needed for adequate protection
May feel heavy or thick in formulation
Science: Zinc oxide is a mineral UV filter with an established safety profile and is not systemically absorbed through skin. Current scientific evidence supports its efficacy and safety for routine sunscreen use, with no associated negative health effects documented. Unlike organic UV filters, it does not contribute to environmental concerns like coral bleaching.
Witch hazel is a plant extract derived from the North American shrub Hamamelis virginiana. It's commonly used in skincare for its astringent properties, meaning it can help tighten skin and reduce the appearance of pores. It's a traditional ingredient found in many toners and cleansers, particularly those marketed for oily or acne-prone skin.
Benefits
Astringent effect that may temporarily tighten pores and reduce oiliness
Anti-inflammatory properties that may help soothe irritated skin
Gentle enough for sensitive skin when appropriately formulated
Potential concerns
Can be drying if used excessively or on already dry skin
Alcohol content in some witch hazel products may cause irritation or dryness for sensitive individuals
Effects are primarily temporary; doesn't permanently shrink pores
Science: Witch hazel has been used traditionally for centuries and is generally recognized as safe by cosmetic regulators. Limited peer-reviewed data is available on its specific efficacy in modern skincare formulations, though some studies support its mild anti-inflammatory and astringent properties.
Purified water is water that has been filtered and processed to remove impurities, minerals, and contaminants. In skincare products, it serves as the primary base ingredient that delivers active compounds to your skin and helps maintain hydration.
Benefits
Acts as a hydrating base for skincare formulations
Helps dissolve and deliver active ingredients
Provides a clean, neutral foundation free from tap water impurities
Science: Purified water is a well-established, inert ingredient with an excellent safety profile in topical skincare. Research referenced here examined enhanced water formulations (oxygen nano-bubble water and ozone water) rather than standard purified water itself, but found purified water to be safe as a control baseline.
Hydroxypropyl cyclodextrin is a helper ingredient that works like a tiny molecular cage, trapping other active ingredients to make them more stable, easier for skin to absorb, and less irritating. It's commonly used to improve how well beneficial compounds like antioxidants and soothing agents penetrate the skin.
Benefits
Improves skin absorption of active ingredients
Increases stability of sensitive or unstable actives
Reduces potential irritation from encapsulated ingredients
Enhances effectiveness of antioxidants and anti-inflammatory compounds
Science: Recent research shows hydroxypropyl cyclodextrin can enhance skin penetration of active ingredients by up to 3.5 times while simultaneously reducing irritation and improving stability. It functions as a delivery system that makes other skincare actives work better and gentler on skin.
Glycerin is a natural humectant derived from vegetable oils that draws moisture from the air into your skin. It's one of the most widely used and effective hydrating ingredients in skincare, helping to plump skin and improve its moisture barrier.
Benefits
Hydrates and moisturizes skin by attracting water
Improves skin texture and smoothness
Supports the skin barrier and reduces water loss
Suitable for most skin types including sensitive skin
Non-comedogenic (won't clog pores)
Science: Glycerin is one of the most extensively studied and established skincare ingredients with a long history of safe cosmetic use. Multiple studies confirm its efficacy as a humectant and its ability to improve skin hydration without irritation.
Panthenol is a moisturizing ingredient derived from pantothenic acid (vitamin B5) that helps skin retain water and feel softer. It's gentle, widely used in skincare products, and supports the skin's natural barrier function.
Benefits
Hydrates and moisturizes skin
Soothes irritated or sensitive skin
Improves skin softness and smoothness
Supports skin barrier health
Science: Panthenol is well-established in cosmetic use with a strong safety profile and minimal irritation potential. Research supports its hydrating properties and ability to improve skin barrier function, making it suitable for sensitive skin types.
Tocopheryl acetate is a stable, oil-soluble form of vitamin E commonly used in skincare. It works as an antioxidant to help protect skin from environmental damage and may help maintain skin moisture.
Benefits
Antioxidant protection against free radicals
May help reduce signs of aging
Supports skin hydration and barrier function
Potential concerns
Rare allergic contact dermatitis in sensitive individuals
May cause mild irritation at high concentrations
Science: Tocopheryl acetate is widely used and generally recognized as safe in cosmetics. It's a stable derivative of vitamin E that the skin can convert to active vitamin E, supporting antioxidant benefits, though direct peer-reviewed efficacy studies specifically on this ester are limited compared to unesterified vitamin E.
