A gentle, animal-derived emulsifier that stabilizes creams and lotions without stripping the skin.
Irritation
low
Source
semi-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 gentle, animal-derived emulsifier that stabilizes creams and lotions without stripping the skin.
Irritation
low
Source
semi-synthetic
Tallowtrimonium Chloride is an effective conditioning ingredient derived from animal fats, but it may cause irritation or clog pores in sensitive individuals.
Irritation
moderate
Source
semi-synthetic
A fragrant essential oil with some antimicrobial potential, but its strong aroma and potential for skin irritation limit its use in sensitive skin formulations.
Irritation
moderate
Source
natural
Tamanu fruit oil is a gentle, plant-based emollient that helps soften and soothe the skin, with some research suggesting it may support a healthy-looking complexion.
Irritation
low
Source
natural
A soothing, nutrient-rich oil that helps calm irritation and deeply moisturize without clogging pores.
Irritation
low
Source
natural
A gentle, plant-based extract that helps calm irritation and provides antioxidant protection, but more human studies are needed to confirm its benefits.
Irritation
low
Source
natural
A gentle, natural humectant from tamarind that helps hydrate and soothe skin, with some antioxidant benefits.
Irritation
low
Source
natural
Tamarind fruit juice is a gentle, natural humectant that helps hydrate and lightly exfoliate skin, making it a good option for those seeking plant-based skincare ingredients.
Irritation
low
Source
natural
Film Former
TAMARINDUS INDICA HYDROXYPROPYLTRIMONIUM CHLORIDE
A gentle, plant-derived conditioning ingredient that helps hair feel soft and smooth without heavy buildup.
Irritation
low
Source
semi-synthetic
A gentle, plant-based thickener and film former that can add a silky feel and light hydration to skincare products.
Irritation
low
Source
natural
A gentle, antioxidant-rich bark extract that may help calm skin and fight environmental stress, though research is still limited.
Irritation
low
Source
natural
A gentle botanical extract with antioxidant potential, but research is limited and it's not a standout ingredient.
Irritation
low
Source
natural
A gentle, antioxidant-rich fruit extract that may help brighten and soothe skin, though research is still emerging.
Irritation
low
Source
natural
A gentle, antioxidant-rich citrus extract that may help brighten skin and protect against environmental stress, but research is still early.
Irritation
low
Source
natural
A botanical root extract with insect-repelling history, but its use in skincare is limited and may cause irritation for sensitive skin.
Irritation
moderate
Source
natural
A gentle, mineral-rich clay that helps absorb excess oil and impurities without stripping the skin.
Irritation
low
Source
natural
A gentle fruit juice that offers mild exfoliation and antioxidant benefits, but may cause irritation for sensitive skin.
Irritation
moderate
Source
natural
A gentle, natural exfoliating powder from tangelo fruit that offers mild antioxidant benefits, best for those who prefer fruit-based skincare.
Irritation
low
Source
natural
A gentle, natural exfoliant that also delivers antioxidants from citrus peels, but its effectiveness and stability depend heavily on how it's processed and formulated.
Irritation
low
Source
natural
Tangerine extract offers gentle antioxidant protection and a subtle brightening effect, but its benefits are mild compared to more potent vitamin C forms.
Irritation
low
Source
natural
Tangerine fruit water is a gentle, water-based botanical that adds light hydration and a subtle citrus scent, but its benefits beyond fragrance are not well-studied.
Irritation
low
Source
natural
A fragrant essential oil that adds a fresh citrus scent to products, but may cause irritation in sensitive skin and offers limited proven skincare benefits.
Irritation
moderate
Source
natural
A gentle, aromatic water from tangerine leaves that adds a light citrus scent and mild antioxidant benefits to skincare, but lacks strong clinical research.
Irritation
low
Source
natural
A gentle antioxidant-rich extract that may help brighten skin and protect against environmental stressors, but its effects are mild compared to more potent actives.
Irritation
low
Source
natural
Tangerine Peel Oil adds a bright citrus scent to products and may offer mild antioxidant benefits, but it can be irritating for sensitive skin and may increase sun sensitivity.
Irritation
moderate
Source
natural
A gentle, natural physical exfoliant with antioxidant benefits, best suited for normal to combination skin types.
Irritation
low
Source
natural
A gentle, aromatic water from tangerine peels that offers light antioxidant benefits and a fresh scent, but its effects are mild compared to concentrated citrus extracts.
Irritation
low
Source
natural
A gentle antioxidant from citrus that helps protect skin from environmental stress without irritation.
Irritation
low
Source
natural
Tannic acid is a plant antioxidant that can help soothe and tighten skin, but it may irritate sensitive skin at higher concentrations.
Irritation
moderate
Source
natural
Tansy extract is a plant-based ingredient with antioxidant potential, but its use in skincare is still emerging and may cause irritation in sensitive individuals.
Irritation
moderate
Source
natural
Tansy flower extract offers astringent and soothing benefits, but its use in skincare is limited by potential skin irritation and lack of robust safety data.
Irritation
moderate
Source
natural
Tansy flower oil is a fragrant botanical oil with limited modern skincare research; it may offer antimicrobial benefits but carries a moderate risk of skin irritation and is best used in low concentrations.
Irritation
moderate
Source
natural
Tapioca starch is a gentle, plant-based powder that helps control shine and gives a silky feel without clogging pores.
Irritation
low
Source
natural
A gentle, plant-based powder that soaks up excess oil and gives a smooth, non-greasy feel without clogging pores.
Irritation
low
Source
natural
A gentle, oil-absorbing powder that gives a smooth, matte feel without clogging pores.
Irritation
low
Source
semi-synthetic
A gentle, antioxidant-rich plant extract that may help calm skin and fight free radical damage, though research is still limited.
Irritation
low
Source
natural
A traditional emollient oil with a rich fatty acid profile, best for dry or rough skin but may be comedogenic for acne-prone types.
Irritation
low
Source
natural
A gentle, plant-based antioxidant that may help calm skin and fight free radical damage, though research on its cosmetic benefits is still limited.
Irritation
low
Source
natural
A gentle, plant-based extract that may help calm irritation and provide antioxidant protection, though research on its topical benefits is still limited.
Irritation
low
Source
natural
A gentle plant extract with antioxidant potential, but research is still early and benefits are not yet proven in human skin.
Irritation
low
Source
natural
A gentle botanical extract with antioxidant potential, but research on its topical benefits is still limited.
Irritation
low
Source
natural
A gentle botanical extract with antioxidant potential, but research on its specific skin benefits is still limited.
Irritation
low
Source
natural
Tartaric acid is a gentle AHA exfoliant that helps smooth skin texture and brighten complexion, but it can cause irritation if overused.
Irritation
moderate
Source
natural
A gentle plant extract with antioxidant potential, but research in cosmetics is still limited.
Irritation
low
Source
natural
A gentle antioxidant extract from Tartary buckwheat seeds that may help calm skin and protect against environmental stress.
Irritation
low
Source
natural
A gentle, antioxidant-rich botanical extract that helps protect skin from environmental stress and may calm irritation.
Irritation
low
Source
natural
A gentle, antioxidant-rich extract from Tasmanian pepperberry that helps protect skin from environmental stress and may calm irritation.
Irritation
low
Source
natural
A gentle, antioxidant-rich botanical powder that may help protect skin from environmental stress and support a balanced microbiome.
Irritation
low
Source
natural
A gentle, antioxidant-rich botanical extract that may help protect skin from environmental stress, though human studies are limited.
Irritation
low
Source
natural
A gentle botanical extract with antioxidant and soothing potential, but research on its cosmetic benefits is still limited.
Irritation
low
Source
natural
Taurine is a gentle antioxidant and hydrator that helps protect skin from environmental stress and supports moisture balance.
Irritation
low
Source
natural
Taxamairin A is a plant-derived antioxidant with early research suggesting it may help protect skin from environmental stress, but it is not yet widely studied in cosmetics.
Irritation
low
Source
natural
Taxamairin C is a rare plant antioxidant from yew trees with promising lab data, but human skin studies are still limited.
Irritation
low
Source
natural
Taxiresinol is a plant-derived antioxidant that may help calm skin and fight free radical damage, but research is still early.
Irritation
low
Source
natural
Antioxidant
TAXUS CUSPIDATA MERISTEM CELL CULTURE CONDITIONED MEDIA
A plant stem cell ingredient that may help protect skin from environmental stress, but human research is still limited.
Irritation
low
Source
biotech
Tayuya Root Extract is a gentle botanical with traditional anti-inflammatory uses, but modern skincare evidence is limited.
Irritation
low
Source
natural
Tazarotene is a potent prescription retinoid that effectively treats acne and reduces fine lines, but it requires careful use due to high irritation potential.
Irritation
high
Source
synthetic
TBHQ is a synthetic preservative that keeps oils fresh, but its safety is debated at higher concentrations.
Irritation
low
Source
synthetic
A synthetic antioxidant that helps keep your products fresh, but it's not a star ingredient for your skin.
Irritation
low
Source
synthetic
A synthetic antioxidant that helps keep oils and fats from going rancid, but it's not a star active for skin benefits.
Irritation
low
Source
synthetic