An effective foam booster and surfactant, but may cause irritation for sensitive skin and raises ethical concerns due to its animal-derived origin.
Irritation
moderate
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
An effective foam booster and surfactant, but may cause irritation for sensitive skin and raises ethical concerns due to its animal-derived origin.
Irritation
moderate
Source
semi-synthetic
A synthetic film-forming polymer that helps products stay put, but its animal-derived origin may not suit everyone.
Irritation
low
Source
synthetic
Hair Conditioning Agent
DIHYDROXYETHYLAMINO HYDROXYPROPYL OLEATE
A mild, plant-derived conditioning agent that helps detangle hair and soften skin without heavy buildup.
Irritation
low
Source
semi-synthetic
Dihydroxyindole is a natural melanin precursor that may help enhance pigmentation and provide antioxidant benefits, but its cosmetic use is still emerging and not widely studied in humans.
Irritation
low
Source
natural
Skin Conditioning Agent
DIHYDROXYISOPROPYL CAPRYLOYLCAPRYLAMIDE
A gentle synthetic ingredient that helps condition skin and improve the feel of cleansers without stripping moisture.
Irritation
low
Source
synthetic
A mild synthetic surfactant that helps create rich foam and improve cleansing texture, generally well-tolerated by most skin types.
Irritation
low
Source
synthetic
A gentle, synthetic ceramide that strengthens the skin barrier and locks in moisture without irritation.
Irritation
low
Source
synthetic
A gentle synthetic antioxidant that helps brighten skin and fight signs of aging, with a good safety profile for most skin types.
Irritation
low
Source
synthetic
A gentle antioxidant that helps calm redness and protect skin from environmental stress.
Irritation
low
Source
natural
A gentle, water-loving amino acid derivative that helps attract moisture to the skin and may support a healthier barrier.
Irritation
low
Source
semi-synthetic
A gentle amino acid derivative that helps reinforce hair structure, making strands feel stronger and less prone to breakage.
Irritation
low
Source
semi-synthetic
Eyelash growth enhancer
Dihydroxypropyl Dehydrolatanoprostamide
A synthetic prostaglandin analog that can boost eyelash growth but may cause irritation and requires careful use.
Irritation
moderate
Source
synthetic
Eyelash growth stimulant
DIHYDROXYPROPYL DIDEHYDROLATANOPROSTAMIDE
A synthetic prostaglandin analog that can enhance eyelash and brow growth but carries risks of irritation and potential eye-area side effects.
Irritation
moderate
Source
synthetic
A gentle, modified milk protein that forms a protective film on hair and skin to lock in moisture and smooth texture.
Irritation
low
Source
semi-synthetic
A gentle, low-irritation surfactant that helps create a rich lather and improve cleansing without stripping the skin.
Irritation
low
Source
semi-synthetic
Antistatic Agent
DIHYDROXYPROPYL PEG-10 STEARAMMONIUM CHLORIDE
A synthetic conditioning ingredient that helps detangle and soften hair, but may not suit very fine or easily weighed-down hair types.
Irritation
low
Source
synthetic
A modern, non-sticky humectant that pulls water into the skin without the tackiness of glycerin.
Irritation
low
Source
semi-synthetic
A gentle antistatic and conditioning ingredient that helps reduce flyaways and improve hair feel without heavy buildup.
Irritation
low
Source
synthetic
An effective preservative but can be a skin sensitizer, so it's best suited for rinse-off products or low concentrations.
Irritation
moderate
Source
synthetic
A silky, non-greasy emollient that feels lightweight on skin and helps other ingredients spread evenly.
Irritation
low
Source
semi-synthetic
A silky, non-greasy emollient that softens skin without clogging pores, ideal for lightweight formulas.
Irritation
low
Source
natural
A lightweight synthetic emollient that helps products spread smoothly without a greasy feel, generally considered safe for most skin types.
Irritation
low
Source
synthetic
A synthetic pigment that delivers vivid, stable color but has limited research on long-term skin effects.
Irritation
low
Source
synthetic
A lightweight, non-greasy emollient that helps products spread smoothly and leaves skin feeling soft without clogging pores.
Irritation
low
Source
synthetic
A synthetic solvent used mainly in fragrances; not a primary skincare active and may cause irritation at higher levels.
Irritation
moderate
Source
synthetic
A lightweight synthetic emollient that helps products spread smoothly and leaves skin feeling soft without greasiness.
Irritation
low
Source
synthetic
Diisobutyl Oxalate is a synthetic solvent that helps dissolve other ingredients and creates a silky feel, but it has limited research on long-term skin effects.
Irritation
low
Source
synthetic
A strong synthetic cleanser that effectively removes oil and dirt but may be drying or irritating for sensitive skin.
Irritation
moderate
Source
synthetic
A lightweight, non-greasy emollient that helps products glide on smoothly without clogging pores.
Irritation
low
Source
synthetic
A lightweight synthetic oil that softens skin without clogging pores, commonly used to improve product texture.
Irritation
low
Source
synthetic
A lightweight, non-greasy emollient that hydrates and smooths skin without clogging pores.
Irritation
low
Source
synthetic
A lightweight synthetic emollient that softens skin without clogging pores, commonly used to improve product texture and spreadability.
Irritation
low
Source
synthetic
Diisodecyl phthalate is a plasticizer with limited cosmetic use; it is not a typical skincare ingredient and is best avoided due to potential health concerns.
Irritation
low
Source
synthetic
Diisoheptyl Phthalate is a synthetic plasticizer with no proven skincare benefit and potential health concerns; it is best avoided in leave-on products.
Irritation
moderate
Source
synthetic
A silky, lightweight emollient that hydrates without clogging pores, making it a great choice for oily or acne-prone skin.
Irritation
low
Source
synthetic
A lightweight, non-greasy emollient that leaves skin feeling soft and smooth without clogging pores.
Irritation
low
Source
synthetic
A lightweight synthetic ester that softens skin without clogging pores, commonly used to improve product texture.
Irritation
low
Source
synthetic
A lightweight synthetic emollient that helps products spread easily and leaves skin feeling soft, but may clog pores for some people.
Irritation
low
Source
synthetic
A lightweight, non-greasy emollient that helps skincare products spread easily and leaves skin feeling soft without clogging pores.
Irritation
low
Source
synthetic
A lightweight, non-greasy emollient that helps skin feel soft and smooth without clogging pores.
Irritation
low
Source
synthetic
Film Former
DIISOPROPANOLAMINE/METHYLHEXAHYDROPHTHALIC ANHYDRIDE ETHYLHEXANOATE COPOLYMER
A synthetic polymer that helps products stay put and resist water, but offers no active skincare benefit.
Irritation
low
Source
synthetic
Film Former
DIISOPROPANOLAMINE/METHYLHEXAHYDROPHTHALIC ANHYDRIDE NONANOATE COPOLYMER
A synthetic film-former that helps products stay put, but offers no active skincare benefit.
Irritation
low
Source
synthetic
A silky, non-greasy emollient that helps products spread easily and leaves skin feeling soft without clogging pores.
Irritation
low
Source
synthetic
Diisopropyl Benzaldehyde is a synthetic fragrance ingredient with limited safety data; it may cause skin irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
A lightweight synthetic emollient that helps soften skin and improve product texture, but it's not a star ingredient with proven long-term benefits.
Irritation
low
Source
synthetic
Diisopropyl Methyl Cinnamate is a synthetic UV filter that helps protect skin from sun damage, but its use is limited compared to more common sunscreen ingredients.
Irritation
low
Source
synthetic
Diisopropyl Oxalate is a synthetic ingredient that helps other ingredients dissolve and spread smoothly, with a low risk of irritation or clogged pores.
Irritation
low
Source
synthetic
A lightweight, non-greasy emollient that softens skin and improves product feel, with a low risk of irritation or clogged pores.
Irritation
low
Source
synthetic
Emulsifier
Diisostearoyl Polyglyceryl-3 Dimer Dilinoleate
A gentle, plant-based emulsifier that creates a silky feel and helps stabilize formulas without clogging pores.
Irritation
low
Source
semi-synthetic
Film Former
Diisostearoyl Trimethylolpropane Siloxy Silicate
A silicone-based film former that gives a silky, smooth feel and helps makeup last longer without clogging pores.
Irritation
low
Source
synthetic
A lightweight, silky emollient that hydrates without clogging pores, ideal for oily and combination skin types.
Irritation
low
Source
synthetic
A gentle, non-greasy emollient that helps products glide on smoothly and keeps skin feeling soft.
Irritation
low
Source
synthetic
A gentle, non-greasy emollient that helps soften and smooth the skin without clogging pores.
Irritation
low
Source
synthetic
A gentle, non-greasy emollient that hydrates and smooths skin without clogging pores.
Irritation
low
Source
synthetic
A mild, amino-acid-based emulsifier that helps blend oil and water in creams and lotions while leaving skin feeling soft and smooth.
Irritation
low
Source
semi-synthetic
A reliable, silky emollient that improves texture and pigment spread without clogging pores or irritating skin.
Irritation
low
Source
synthetic
A lightweight, non-greasy emollient that helps skin feel smooth and soft without clogging pores.
Irritation
low
Source
synthetic
A mild, amino-acid-derived emulsifier that helps create stable, creamy textures with very low irritation potential.
Irritation
low
Source
semi-synthetic
A gentle synthetic surfactant that effectively cleanses without stripping the skin's natural moisture barrier.
Irritation
low
Source
synthetic
A gentle conditioning ingredient that reduces static and softens hair without heavy buildup.
Irritation
low
Source
synthetic