This is a thickening and stabilizing agent that helps give skincare products their texture and consistency. It works by absorbing water and forming a gel-like network, making products feel smooth and creamy on the skin without leaving a greasy residue.
Benefits
Creates smooth, pleasant product texture
Helps stabilize emulsions and prevent separation
Allows for lightweight formulations that don't feel heavy
Science: Limited peer-reviewed data available for this ingredient. It is widely used in cosmetics and generally recognized as safe by regulatory bodies including the CosIng database and is approved for use in the EU and US.
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.
Sodium benzoate is a preservative used in skincare products to prevent bacterial and fungal growth, extending shelf life. It's a salt derived from benzoic acid and is one of the most widely used preservatives in cosmetics, skincare, and food products.
Benefits
Prevents microbial contamination and extends product shelf life
Generally effective at low concentrations (0.1-0.5%)
Approved for cosmetic use by major regulatory bodies
Potential concerns
Can cause allergic contact dermatitis in sensitive individuals; identified as an allergen in medical hand cleansers
Recent research suggests long-term oral intake may affect bone health and increase osteoporosis risk, though topical skincare exposure is minimal
Science: Sodium benzoate is well-established as a safe preservative in cosmetics at typical use levels. However, emerging research indicates that chronic systemic intake may interfere with bone metabolism through the FGF2/p38/RUNX2 pathway. For topical skincare use, the exposure and absorption are minimal compared to dietary intake, but individuals with known sensitivities should avoid it.
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.
Tea tree oil is a natural essential oil extracted from the leaves of the Australian tea tree plant. It's commonly used in skincare for its antimicrobial and anti-inflammatory properties, and is often found in products targeting acne-prone or oily skin.
Benefits
May help reduce bacteria associated with acne and blemishes
Can have anti-inflammatory effects to calm irritated skin
Often used to address oily or congested skin
Potential concerns
Can cause irritation, redness, or sensitivity in some people, especially with undiluted use
May trigger allergic contact dermatitis in sensitive individuals
Should be patch-tested before regular use; not recommended for very sensitive or compromised skin barrier
Science: Tea tree oil has been studied for antimicrobial activity against acne-causing bacteria and shows some efficacy in clinical trials, though results vary. It is generally recognized as safe in cosmetic formulations at typical use levels, but undiluted or highly concentrated forms carry higher irritation risk.
Deionized water is purified water with minerals and ions removed, used as the main carrier and base ingredient in most skincare products. It helps dissolve and distribute active ingredients evenly throughout the formula.
Benefits
Hydrates and plumps the skin
Serves as a neutral base for other active ingredients
Helps maintain product texture and consistency
Science: Water is the most extensively studied cosmetic ingredient with a long history of safe use in skincare. Deionized water specifically minimizes mineral content that could interfere with product stability or efficacy.
