A synthetic polymer that helps nail polish dry hard and stay glossy, but its safety relies on proper formulation and avoiding inhalation during application.
Irritation
low
Source
synthetic
Beauty ingredient research
Browse the review database to understand what an ingredient is, what it does in a beauty formula, when it is useful, and when it deserves caution across skincare, haircare, bodycare, makeup, and more.
20769
Reviewed ingredients
524
Low-concern standouts
2884
Need usage caution
A synthetic polymer that helps nail polish dry hard and stay glossy, but its safety relies on proper formulation and avoiding inhalation during application.
Irritation
low
Source
synthetic
A gentle antioxidant duo from green tea and ginseng that helps protect skin from environmental stress and may support a calmer complexion.
Irritation
low
Source
natural
A gentle, effective cleanser that removes dirt and oil without stripping the skin, but may not suit ultra-sensitive scalps.
Irritation
low
Source
synthetic
Tea Hydrochloride is a gentle pH adjuster that helps keep your skincare products stable and comfortable on skin, but it offers no direct skin benefits.
Irritation
low
Source
synthetic
Tea Hydroiodide is a synthetic preservative booster with limited safety data; it's rarely used in modern skincare and may cause irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
A synthetic emulsifier that helps water-resistant formulas spread evenly, but its perfluoroalkyl structure raises environmental persistence concerns.
Irritation
moderate
Source
synthetic
A gentle, antioxidant-rich extract from young tea leaves that helps protect skin from environmental stress and may calm irritation.
Irritation
low
Source
natural
A natural antimicrobial extract that can help with acne-prone skin but may cause irritation at high concentrations.
Irritation
moderate
Source
natural
Tea tree leaf extract is a natural antimicrobial ingredient often used to help manage acne and soothe minor skin irritations, but it can be irritating at high concentrations.
Irritation
moderate
Source
natural
Tea tree leaf powder can help purify oily or blemish-prone skin, but it may cause irritation in sensitive individuals.
Irritation
moderate
Source
natural
A milder alternative to tea tree oil, tea tree leaf water offers gentle antimicrobial benefits with a much lower risk of irritation.
Irritation
low
Source
natural
Tea tree oil is a natural antimicrobial that can help with mild acne, but it must be used at safe concentrations to avoid skin irritation.
Irritation
moderate
Source
natural
A semi-synthetic collagen derivative that forms a light film on skin to help smooth texture and temporarily reduce the look of fine lines, but research on its long-term benefits is limited.
Irritation
low
Source
semi-synthetic
A synthetic film-former that helps products stay put, but offers no active skincare benefit.
Irritation
low
Source
synthetic
A synthetic film-former that helps makeup and sunscreen stay put, especially in water-resistant formulas.
Irritation
low
Source
synthetic
An effective but potentially drying cleanser that works well for oily skin but may irritate sensitive or dry skin.
Irritation
moderate
Source
synthetic
A strong synthetic cleanser that effectively removes dirt and oil but may be drying or irritating for sensitive skin.
Irritation
moderate
Source
synthetic
A gentle cleansing agent that effectively removes dirt and oil without stripping the skin.
Irritation
low
Source
synthetic
A mild-ish synthetic surfactant that helps cleanse without stripping, but may still irritate very sensitive skin.
Irritation
moderate
Source
synthetic
A synthetic surfactant that effectively cleanses and foams, but may be drying or irritating for sensitive skin types.
Irritation
moderate
Source
synthetic
A milder alternative to sodium lauryl sulfate, but still a surfactant that can be drying for sensitive skin.
Irritation
moderate
Source
synthetic
A mild synthetic surfactant that effectively cleanses without stripping the skin's natural moisture barrier.
Irritation
low
Source
synthetic
A mild foaming cleanser that effectively removes dirt and oil, but may be drying for very sensitive or dry skin.
Irritation
moderate
Source
synthetic
An effective foaming cleanser that can be drying or irritating for sensitive skin, but is generally considered safe in rinse-off products.
Irritation
moderate
Source
synthetic
A gentle surfactant that cleans without stripping the skin, making it a good choice for sensitive or dry skin types.
Irritation
low
Source
synthetic
TEA-Canolate is a mild cleansing agent from canola oil, but may be slightly drying for sensitive skin.
Irritation
moderate
Source
semi-synthetic
A safe, effective thickener that gives your skincare products a pleasant gel or cream texture without clogging pores.
Irritation
low
Source
synthetic
A gentle, coconut-derived cleansing ingredient that helps create a rich lather without stripping the skin.
Irritation
low
Source
semi-synthetic
A coconut-derived surfactant that cleans effectively but may be drying for sensitive skin.
Irritation
moderate
Source
semi-synthetic
TEA-Cocoate is a gentle cleansing agent that helps remove dirt and oil, but it may be slightly drying for very sensitive skin.
Irritation
moderate
Source
semi-synthetic
A gentle, amino-acid-based cleanser that effectively removes dirt and oil without stripping the skin, making it ideal for sensitive or dry skin types.
Irritation
low
Source
semi-synthetic
A gentle, plant-derived surfactant that cleanses without stripping the skin barrier, ideal for sensitive or dry skin.
Irritation
low
Source
semi-synthetic
A gentle, amino-acid-based surfactant that cleanses effectively while respecting the skin barrier — ideal for sensitive or dry skin.
Irritation
low
Source
semi-synthetic
A mild, coconut-derived cleanser that effectively removes dirt and oil without stripping the skin, making it ideal for sensitive or dry skin types.
Irritation
low
Source
semi-synthetic
A gentle, coconut-derived cleanser that also conditions skin and hair, but may not be ideal for very dry or sensitive scalps in high concentrations.
Irritation
low
Source
semi-synthetic
A mild, protein-based surfactant that cleanses gently while helping hair and skin feel soft and conditioned.
Irritation
low
Source
semi-synthetic
A gentle, amino-acid-based cleanser that effectively removes impurities while being kind to sensitive skin.
Irritation
low
Source
semi-synthetic
A gentle, starch-based ingredient that improves product feel and stability without clogging pores or causing irritation.
Irritation
low
Source
semi-synthetic
Film Former
TEA-DIETHANOLAMINOETHYL POLYISOBUTENYLSUCCINATE
A synthetic film-former that helps products stay put and resist water, but offers no active skincare benefit.
Irritation
low
Source
synthetic
A gentle silicone emulsifier that helps create stable, lightweight formulas without heavy residue.
Irritation
low
Source
semi-synthetic
A gentle emulsifier that helps mix oil and water in skincare products, with low irritation potential.
Irritation
low
Source
semi-synthetic
A synthetic film-former that helps makeup and sunscreen stay put longer, but may feel heavy on some skin types.
Irritation
low
Source
synthetic
An effective but potentially drying surfactant best suited for rinse-off cleansers, not for sensitive or dry skin.
Irritation
moderate
Source
synthetic
A gentle humectant that helps hydrate and condition skin without common irritation or clogging concerns.
Irritation
low
Source
semi-synthetic
A mild cleansing agent that helps remove dirt and oil, but may cause irritation for very sensitive skin.
Irritation
moderate
Source
semi-synthetic
A mild, amino-acid-based surfactant that cleanses effectively while being gentle on the skin barrier.
Irritation
low
Source
semi-synthetic
TEA-Isostearate is a synthetic emulsifier that helps cleanse and stabilize formulas, but may cause mild irritation for sensitive skin.
Irritation
moderate
Source
synthetic
A gentle, modified collagen that helps hair and skin feel smooth and conditioned, but its benefits are mostly temporary and surface-level.
Irritation
low
Source
semi-synthetic
A gentle surfactant that cleans without stripping, but may be slightly pore-clogging for acne-prone skin.
Irritation
low
Source
semi-synthetic
A gentle surfactant that effectively cleanses without stripping the skin, suitable for sensitive skin types.
Irritation
low
Source
synthetic
TEA-Laurate helps create lather and remove dirt, but it can be drying or irritating for sensitive skin.
Irritation
moderate
Source
synthetic
A synthetic cleansing agent that can be effective but may cause irritation for sensitive skin.
Irritation
moderate
Source
synthetic
A milder alternative to SLS that effectively cleanses without stripping the skin as harshly, but may still cause irritation for sensitive skin.
Irritation
moderate
Source
synthetic
A gentle synthetic surfactant that helps cleanse without stripping the skin's natural moisture barrier.
Irritation
low
Source
synthetic
A gentle, amino-acid-based surfactant that cleanses effectively without stripping the skin barrier.
Irritation
low
Source
semi-synthetic
A gentle, amino-acid-based cleanser that effectively removes impurities while respecting the skin’s natural barrier.
Irritation
low
Source
semi-synthetic
A gentle, collagen-derived surfactant that cleans without stripping, making it a good choice for sensitive skin and hair.
Irritation
low
Source
semi-synthetic
A mild, protein-derived surfactant that cleanses gently while helping hair and skin feel soft and conditioned.
Irritation
low
Source
semi-synthetic
A gentle, sulfate-free surfactant that cleanses without stripping the skin barrier, making it a good choice for sensitive or dry skin.
Irritation
low
Source
semi-synthetic
A gentle, amino-acid-based surfactant that cleanses effectively while being kind to sensitive skin.
Irritation
low
Source
synthetic