A synthetic scent ingredient that adds a warm, woody note to products, but offers no skincare benefit and may cause sensitivity in some people.
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 scent ingredient that adds a warm, woody note to products, but offers no skincare benefit and may cause sensitivity in some people.
Irritation
low
Source
synthetic
A biotech peptide from transgenic rice that may support collagen and skin firmness, but human research is still limited.
Irritation
low
Source
biotech
A biotech rice peptide that may support collagen and skin firmness, but human research is still limited.
Irritation
low
Source
biotech
A lab-made peptide from silkworms that may help firm skin and reduce fine lines, but research is still early.
Irritation
low
Source
biotech
A biotech peptide from tobacco that may help reduce fine lines, but research is still limited compared to traditional peptides.
Irritation
low
Source
biotech
Transglutaminase is a biotech enzyme that may help reinforce the skin's structure, but its benefits in cosmetics are still being explored.
Irritation
low
Source
biotech
A botanical extract with traditional astringent uses, but limited modern research on its skincare benefits.
Irritation
low
Source
natural
A gentle, antioxidant-rich plant extract from tree peony callus that may help calm skin and fight free radical damage, though research is still emerging.
Irritation
low
Source
natural
A gentle botanical extract that helps protect skin from environmental stress and may calm irritation.
Irritation
low
Source
natural
A gentle, plant-derived antioxidant extract that may help calm skin and fight free radical damage, though human research is still limited.
Irritation
low
Source
natural
Tree Wormwood Herb Oil offers potential soothing and antimicrobial benefits, but its potency and lack of broad safety data mean it's best used in low concentrations and with caution.
Irritation
moderate
Source
natural
Trehalose is a gentle, natural humectant that pulls water into the skin and helps protect it from drying out, making it a great option for dry or sensitive skin.
Irritation
low
Source
natural
A gentle, moisture-binding ingredient that also helps reduce static and improve hair manageability.
Irritation
low
Source
semi-synthetic
A gentle, sugar-derived ester that hydrates and softens skin without clogging pores.
Irritation
low
Source
semi-synthetic
Trehalose undecylenate is a gentle, sugar-based ester that hydrates and softens skin with low irritation potential, though research on its long-term benefits is still emerging.
Irritation
low
Source
semi-synthetic
Tremella mushroom extract is a gentle, plant-based humectant that helps skin hold onto moisture, often compared to hyaluronic acid.
Irritation
low
Source
natural
A powerful prescription retinoid that effectively treats acne and reduces signs of aging, but requires careful use due to high irritation potential.
Irritation
high
Source
synthetic
A gentle, non-greasy emollient that improves skin feel and product spreadability without clogging pores.
Irritation
low
Source
synthetic
A mild synthetic emulsifier that helps blend oil and water in cleansers, generally well-tolerated but not a standout active ingredient.
Irritation
low
Source
synthetic
A mild synthetic emulsifier that helps blend oil and water in cleansers and lotions, generally well-tolerated by most skin types.
Irritation
low
Source
synthetic
An effective cleansing agent that helps remove dirt and oil, but may be slightly drying for sensitive skin.
Irritation
moderate
Source
synthetic
A mild synthetic surfactant that helps cleanse without stripping, but may cause irritation for very sensitive skin.
Irritation
moderate
Source
synthetic
A gentle, non-greasy emollient that helps skincare products spread smoothly and leaves skin feeling soft without clogging pores.
Irritation
low
Source
synthetic
Antioxidant
JUNIPERUS COMMUNIS FRUIT/ROSMARINUS OFFICINALIS/SALVIA OFFICINALIS EXTRACT
A gentle botanical blend that helps protect skin from environmental stress while offering a mild herbal scent.
Irritation
low
Source
natural
Soothing Agent
Artemisia Princeps Leaf/Equisetum Arvense/Houttuynia Cordata Extract
A gentle botanical blend that may help calm irritation and protect skin from environmental stress, though research on the specific combination is limited.
Irritation
low
Source
natural
Antioxidant
Nelumbo Nucifera Leaf Extract / Orostachys Japonica Extract / Saururus Chinensis Extract
A gentle botanical blend that may help calm skin and fight free radicals, but research is still early.
Irritation
low
Source
natural
A mild, citrate-based emulsifier that helps create stable, creamy textures without common irritation.
Irritation
low
Source
semi-synthetic
Triacetin is a gentle, low-risk solvent and skin conditioner often used to improve product texture and stability.
Irritation
low
Source
synthetic
A gentle, next-generation retinoid alternative that pairs vitamin A activity with skin-identical lipid support, but clinical evidence is still limited.
Irritation
low
Source
semi-synthetic
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 helps products stay put and resist water, but offers no active skincare benefits.
Irritation
low
Source
synthetic
Triarachidin is a gentle, plant-based emollient that helps soften and smooth the skin with a low risk of irritation or clogged pores.
Irritation
low
Source
natural
Tribehenin is a gentle, plant-based emollient that helps soften skin and improve product texture without clogging pores.
Irritation
low
Source
natural
A gentle emulsifier that helps create smooth, stable creams and lotions with a silky feel.
Irritation
low
Source
semi-synthetic
Tribenzoin is a synthetic film-former that helps makeup and nail products glide on smoothly and last longer, with a low risk of irritation.
Irritation
low
Source
synthetic
A gentle, castor-oil-derived emollient that helps cosmetics feel smooth and stay put without clogging pores.
Irritation
low
Source
semi-synthetic
A plant-based antioxidant powder that may help calm skin and fight free radical damage, though research in topical use is still limited.
Irritation
low
Source
natural
A plant extract with antioxidant potential, but limited research supports its topical benefits in skincare.
Irritation
low
Source
natural
A gentle plant extract with antioxidant potential, but research on its topical benefits is still limited.
Irritation
low
Source
natural
A gentle botanical powder with antioxidant potential, but limited research supports its specific skin benefits.
Irritation
low
Source
natural
A safe, low-irritation ingredient that helps formulas spread smoothly and keeps nail polish flexible, but offers no direct skin benefit.
Irritation
low
Source
semi-synthetic
A synthetic emollient that helps products feel silky and spread easily, with low irritation potential.
Irritation
low
Source
synthetic
Tricalcium phosphate is a gentle mineral abrasive and opacifier, safe for most skin types but best suited for rinse-off or low-concentration leave-on formulas.
Irritation
low
Source
natural
Tricaprin is a gentle, non-greasy emollient that helps moisturize and condition the skin, making it a good choice for sensitive or oily skin types.
Irritation
low
Source
semi-synthetic
Tricaprylin is a gentle, lightweight emollient that hydrates without clogging pores, making it a great choice for oily and acne-prone skin types.
Irritation
low
Source
natural
A silky, non-greasy emollient that hydrates and smooths skin without clogging pores, ideal for sensitive and oily skin types.
Irritation
low
Source
semi-synthetic
A silky, non-greasy emollient that helps products spread smoothly and feel lightweight on skin.
Irritation
low
Source
synthetic
A mild synthetic emulsifier that helps mix water and oil in products without stripping the skin.
Irritation
low
Source
synthetic
A synthetic emulsifier that helps mix oil and water, but may be slightly drying for sensitive skin.
Irritation
moderate
Source
synthetic
A mild synthetic emulsifier that helps blend oil and water in creams and lotions, with a low risk of irritation.
Irritation
low
Source
synthetic
A gentle conditioning ingredient that reduces static and softens hair without heavy buildup.
Irritation
low
Source
synthetic
A rich, traditional African seed butter that deeply moisturizes without clogging pores, ideal for dry or sensitive skin.
Irritation
low
Source
natural
A gentle, plant-derived emulsifier that helps blend water and oil in your skincare while adding a touch of skin conditioning.
Irritation
low
Source
semi-synthetic
Emulsifier
Trichilia Emetica Seed Oil Polyglyceryl-6 Esters
A mild, plant-based emulsifier that helps blend oil and water in skincare products while adding a touch of nourishment.
Irritation
low
Source
semi-synthetic
A rich, plant-based butter that softens and hydrates skin without feeling overly greasy, with some antioxidant potential.
Irritation
low
Source
natural
A synthetic fragrance ingredient that adds scent but offers no skincare benefit and may cause irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
A gentle, fatty-acid-rich oil that hydrates and soothes without clogging pores—great for dry or sensitive skin.
Irritation
low
Source
natural
A gentle, antioxidant-rich mushroom extract that may help soothe and protect skin, but research is still early.
Irritation
low
Source
natural
A gentle, plant-based antioxidant extract that may help calm skin and fight free radical damage, though human studies are limited.
Irritation
low
Source
natural
A gentle plant-based powder with antioxidant potential, but research on its cosmetic benefits is still limited.
Irritation
low
Source
natural