A mild dual-action ingredient that gently exfoliates and hydrates, suitable for most skin types.
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 mild dual-action ingredient that gently exfoliates and hydrates, suitable for most skin types.
Irritation
low
Source
semi-synthetic
Urease is a natural enzyme that can gently exfoliate by breaking down urea, but its use in skincare is rare and may cause irritation if not carefully formulated.
Irritation
moderate
Source
natural
Uric acid is a gentle, natural antioxidant that helps protect skin from pollution and UV damage while supporting the skin's moisture barrier.
Irritation
low
Source
natural
Uridine is a gentle, naturally derived ingredient that may help support skin renewal and barrier repair, but research is still early.
Irritation
low
Source
biotech
Ursodiol is a bile acid with emerging research suggesting it may help calm inflammation and support the skin barrier, but it is not yet a mainstream skincare ingredient.
Irritation
low
Source
semi-synthetic
Ursolic acid is a plant-based antioxidant that may help calm skin and support a more even-looking complexion, but human studies are limited.
Irritation
low
Source
natural
A synthetic peptide that may help firm skin and reduce fine lines by signaling collagen production.
Irritation
low
Source
synthetic
A synthetic peptide that may help improve skin firmness and smoothness, but research is still emerging.
Irritation
low
Source
synthetic
A promising synthetic peptide that may help improve skin firmness and reduce fine lines, but more human studies are needed to confirm its effectiveness.
Irritation
low
Source
semi-synthetic
A synthetic peptide that may help improve skin firmness and smooth fine lines, but research is still emerging.
Irritation
low
Source
synthetic
A gentle lichen-derived antioxidant that may help calm skin and fight free radicals, but research is still early.
Irritation
low
Source
natural
Usnea Filipendula Extract is a natural lichen extract with promising antimicrobial activity, but research on its cosmetic benefits is still limited.
Irritation
low
Source
natural
Usnic acid is a lichen-derived compound with antimicrobial and antioxidant benefits, but it can be irritating at high concentrations and is not well-studied in long-term skincare use.
Irritation
moderate
Source
natural
A gentle tea-derived extract with antioxidant potential, but research is limited and benefits are not well-documented in human skin.
Irritation
low
Source
natural
Film Former
VA/BUTYL MALEATE/ISOBORNYL ACRYLATE COPOLYMER
A synthetic film-former that helps products stay put and resist water, but offers no active skincare benefit.
Irritation
low
Source
synthetic
A synthetic film-former that gives hair flexible hold and helps skincare ingredients stay put, but can feel stiff or cause buildup with heavy use.
Irritation
low
Source
synthetic
Film Former
VA/CROTONATES/METHACRYLOXYBENZOPHENONE-1 COPOLYMER
A synthetic polymer that helps sunscreen and makeup stay put longer, especially in water or sweat.
Irritation
low
Source
synthetic
A synthetic film-former that helps products stay put, but offers no active skincare benefit.
Irritation
low
Source
synthetic
A synthetic polymer that gives hair products their hold and flexibility without excessive stiffness or flaking.
Irritation
low
Source
synthetic
A synthetic film-former that gives hair flexible hold and humidity resistance without excessive stiffness.
Irritation
low
Source
synthetic
A synthetic film-former that helps products stay put, but may feel stiff or heavy on some skin types.
Irritation
low
Source
synthetic
Film Former
VA/ISOBUTYL MALEATE/VINYL NEODECANOATE COPOLYMER
A synthetic film-former that helps makeup and sunscreen stay put longer, but offers no active skincare benefit.
Irritation
low
Source
synthetic
A synthetic film-former that gives hair and makeup long-lasting, flexible hold without excessive stiffness or flaking.
Irritation
low
Source
synthetic
A synthetic film-former that helps products stay put, but its vinyl chloride component raises environmental and health questions.
Irritation
low
Source
synthetic
Valencene is a natural citrus-derived fragrance ingredient with mild antioxidant potential, but its main role in skincare is scent rather than active treatment.
Irritation
low
Source
natural
A gentle antioxidant-rich extract that helps protect skin from environmental stress and may support a brighter, more even complexion.
Irritation
low
Source
natural
Valencia orange peel oil adds a bright citrus scent and mild astringency, but can be irritating for sensitive skin, especially in sunlight.
Irritation
moderate
Source
natural
Valeraldehyde is a synthetic fragrance compound that adds a fruity scent but may cause irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
A synthetic fragrance ingredient that adds a fresh scent but offers no skincare benefits and may cause sensitivity in some people.
Irritation
low
Source
synthetic
Valerian root extract is a gentle botanical with potential calming and antioxidant benefits, but research in skincare is limited.
Irritation
low
Source
natural
A gentle botanical extract with potential soothing and antioxidant benefits, but research is limited compared to more common skincare ingredients.
Irritation
low
Source
natural
Valeric acid is a naturally occurring fatty acid used mainly for its scent and to adjust product pH, but it can be irritating at higher concentrations.
Irritation
moderate
Source
natural
Valine is a gentle, water-loving amino acid that helps hydrate skin and support a healthy barrier, making it a safe choice for most skin types.
Irritation
low
Source
natural
A gentle, antioxidant-rich botanical extract that may help soothe and protect skin, though research is still emerging.
Irritation
low
Source
natural
A synthetic peptide that mimics a calming signal to help soothe reactive skin and support barrier repair.
Irritation
low
Source
synthetic
A gentle, antioxidant-rich botanical extract that adds a pleasant scent and may help calm skin, but its benefits are mild compared to more potent antioxidants.
Irritation
low
Source
natural
Vanilla fruit extract is a gentle antioxidant that helps protect skin from environmental stress while offering a subtle, natural scent.
Irritation
low
Source
natural
Vanilla Fruit Oil adds a warm, comforting scent and mild antioxidant benefits to skincare, but its fragrance components can irritate sensitive skin.
Irritation
moderate
Source
natural
A gentle, lightly fragrant water from vanilla pods that adds a subtle antioxidant boost and pleasant scent to skincare, but its benefits are mild compared to more concentrated extracts.
Irritation
low
Source
natural
A gentle, lab-grown antioxidant extract from vanilla leaves that may help calm and protect skin, but research is still early.
Irritation
low
Source
biotech
Vanilla Planifolia Tincture adds a warm, natural fragrance and mild antioxidant benefits to skincare, but its effects are subtle and not a primary active ingredient.
Irritation
low
Source
natural
A gentle, antioxidant-rich extract that may help calm skin and fight free radical damage, but research is still limited.
Irritation
low
Source
natural
Vanilla Seed Powder offers gentle physical exfoliation and antioxidant benefits, but its evidence is limited and it may not suit very sensitive skin.
Irritation
low
Source
natural
A gentle antioxidant that helps protect skin from environmental stress while supporting a calm, even-toned complexion.
Irritation
low
Source
natural
Vanillin adds a warm vanilla scent to skincare and has mild antioxidant activity, but it is primarily a fragrance ingredient with limited skin benefits.
Irritation
low
Source
semi-synthetic
A gentle botanical extract from the Brazilian candeia tree that may help calm skin and fight free radicals, though research is still limited.
Irritation
low
Source
natural
A gentle, fragrant oil from the Candeia tree that may help calm skin and provide antioxidant support, but research is still limited.
Irritation
low
Source
natural
Vanillyl Butyl Ether is a synthetic warming agent that creates a gentle, pleasant heat sensation on the skin without causing irritation, making it a popular sensory booster in skincare.
Irritation
low
Source
synthetic
A synthetic vanilla-like fragrance ingredient that adds scent but offers no skin benefit; generally safe at low levels but may cause irritation in sensitive individuals.
Irritation
low
Source
synthetic
A synthetic ingredient that may help calm redness and even skin tone, but research is still early.
Irritation
low
Source
synthetic
A gentle, antioxidant-rich bark extract that may help protect skin from environmental stress, but research is still early.
Irritation
low
Source
natural
A nourishing, non-greasy plant butter that softens skin and helps restore the moisture barrier, but research on its benefits is still limited.
Irritation
low
Source
natural
Antioxidant
ALLIUM FISTULOSUM STALK/BRASSICA RAPA LEAF/STEM/CAPSICUM ANNUUM FRUIT EXTRACT
A gentle botanical blend that may offer antioxidant and soothing benefits, but research is limited and individual plant contributions vary.
Irritation
low
Source
natural
Antioxidant
Luffa cylindrica Fruit/Daucus carota sativa Root/Cucumis sativus Fruit Extract
A gentle botanical blend that may offer antioxidant and soothing benefits, but research on this specific combination is limited.
Irritation
low
Source
natural
Antioxidant
Luffa cylindrica Fruit/Daucus carota sativa Root/Cucumis sativus Fruit Extract
A gentle botanical blend that offers antioxidant protection and soothing hydration, best for normal to dry skin types.
Irritation
low
Source
natural
A mild, plant-based emulsifier that helps create stable, creamy textures while also softening the skin.
Irritation
low
Source
semi-synthetic
Vegetable Oil is a basic emollient that softens skin, but its exact benefits depend on the specific plant source, and it may clog pores for some people.
Irritation
low
Source
natural
Vegetal oils are natural moisturizers that help soften and protect the skin, but their comedogenic potential varies by type.
Irritation
low
Source
natural
A gentle mushroom extract with antioxidant potential, but research is still early and benefits are not yet proven in human skin.
Irritation
low
Source
natural
A gentle, antioxidant-rich plant extract that may help protect skin from environmental stress, though human studies are limited.
Irritation
low
Source
natural