A gentle synthetic emulsifier that helps mix water and oil in products, generally well-tolerated by most skin types.
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 gentle synthetic emulsifier that helps mix water and oil in products, generally well-tolerated by most skin types.
Irritation
low
Source
synthetic
A gentle emollient and emulsifier that helps products feel smooth and spread easily, with a low risk of irritation.
Irritation
low
Source
semi-synthetic
A gentle, synthetic emollient that helps soften skin and stabilize formulas without common irritation.
Irritation
low
Source
synthetic
A gentle synthetic emulsifier that helps mix oil and water in cleansers and lotions, generally well-tolerated by most skin types.
Irritation
low
Source
synthetic
A gentle emollient that helps soften skin and improve product texture, but offers no unique benefits over more common alternatives.
Irritation
low
Source
semi-synthetic
A gentle emollient that helps soften and smooth skin by replenishing essential fatty acids, with a low risk of irritation.
Irritation
low
Source
semi-synthetic
A synthetic emollient that softens skin and improves product feel, but may clog pores for some people.
Irritation
low
Source
synthetic
A gentle synthetic emollient that helps products glide on smoothly without heavy greasiness.
Irritation
low
Source
synthetic
A mild emollient and emulsifier that helps soften skin and blend ingredients, but may be slightly pore-clogging for acne-prone skin.
Irritation
low
Source
semi-synthetic
A reliable emulsifier that helps blend oil and water in creams, but it's not a star active ingredient for skin benefits.
Irritation
low
Source
semi-synthetic
A synthetic emulsifier that helps mix oil and water in products, but may cause mild irritation for sensitive skin.
Irritation
moderate
Source
synthetic
A gentle emollient that helps soften skin and improve product texture, with a low risk of irritation or clogged pores.
Irritation
low
Source
semi-synthetic
A gentle, plant-based emollient that helps soften and smooth skin without heavy greasiness.
Irritation
low
Source
semi-synthetic
A reliable emulsifier that helps create smooth, stable creams and lotions with a low risk of irritation.
Irritation
low
Source
semi-synthetic
A reliable emulsifier that helps water and oil mix into a stable, creamy texture without common irritation concerns.
Irritation
low
Source
semi-synthetic
Film Former
PROPYLENE GLYCOL/SEBACIC ACID/TRIMELLITIC ANHYDRIDE COPOLYMER
A synthetic polymer that helps products stay put longer, but offers no active skincare benefit.
Irritation
low
Source
synthetic
A silky, lightweight emollient that helps products spread smoothly without feeling heavy or greasy.
Irritation
low
Source
synthetic
A natural fragrance compound from celery seed that adds a warm, spicy scent but offers no direct skincare benefits.
Irritation
low
Source
natural
Propylparaben is an effective preservative but has raised safety concerns due to potential endocrine-disrupting effects, leading many brands to phase it out.
Irritation
low
Source
synthetic
Film Former
PROPYLTRIMONIUMCHLORIDE ACRYLAMIDE/DIMETHYLACRYLAMIDE COPOLYMER
A synthetic polymer that coats hair and skin to reduce frizz, improve slip, and lock in moisture without heavy buildup.
Irritation
low
Source
synthetic
A gentle, modified collagen that adds slip and softness to hair and skin without heavy buildup.
Irritation
low
Source
semi-synthetic
A gentle, plant-derived conditioning ingredient that adds softness and manageability to hair and a smooth feel to skin.
Irritation
low
Source
semi-synthetic
Hair conditioning agent
PROPYLTRIMONIUM HYDROLYZED WHEAT PROTEIN
A gentle, positively charged wheat protein that coats hair to improve softness, manageability, and shine without heavy buildup.
Irritation
low
Source
semi-synthetic
A marine microalgae extract that may help protect skin from environmental stress, but research is still early.
Irritation
low
Source
natural
A gentle botanical extract with antioxidant and soothing potential, best for those seeking natural, plant-based skincare ingredients.
Irritation
low
Source
natural
Protamine sulfate is a gentle film-forming protein that can help condition hair and skin, but its benefits are mild and not well-studied in cosmetics.
Irritation
low
Source
natural
A gentle, natural humectant from South African protea flowers that helps hydrate skin, but research on its specific benefits is still limited.
Irritation
low
Source
natural
Protease is an enzyme exfoliant that gently dissolves dead skin cells, but it can be irritating if left on too long or used too frequently.
Irritation
moderate
Source
biotech
A gentle, antioxidant-rich botanical extract that may help calm skin and fight free radical damage, though research is still emerging.
Irritation
low
Source
natural
A gentle antioxidant that helps defend skin from environmental stress and may calm irritation.
Irritation
low
Source
natural
A gentle antioxidant that helps protect skin from environmental stress and may support a more even tone.
Irritation
low
Source
natural
Protodioscin is a plant saponin with early evidence of antioxidant and anti-inflammatory benefits, but human skincare studies are limited.
Irritation
low
Source
natural
Prunasin is a plant-derived compound with early research suggesting soothing benefits, but it's not widely studied in cosmetics and requires careful sourcing.
Irritation
low
Source
natural
A gentle botanical extract that may help calm irritation and defend against environmental stress, though more human studies are needed.
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, antioxidant-rich flower extract that may help calm skin and fight free radicals, though research is still emerging.
Irritation
low
Source
natural
A gentle, non-greasy plant oil that hydrates and softens skin without clogging pores, making it a good choice for sensitive or acne-prone types.
Irritation
low
Source
natural
A gentle, antioxidant-rich flower extract that may help calm skin and protect against environmental stress, though research is still emerging.
Irritation
low
Source
natural
A gentle, natural powder that can lightly exfoliate or absorb oil, but with limited research on its specific benefits.
Irritation
low
Source
natural
A gentle, antioxidant-rich botanical extract from Japanese apricot buds that may help soothe and protect skin from environmental stress.
Irritation
low
Source
natural
A gentle floral water that may offer soothing and antioxidant benefits, but research is limited compared to more established ingredients.
Irritation
low
Source
natural
A gentle, naturally fermented fruit vinegar that exfoliates and brightens skin without the harshness of stronger acids.
Irritation
low
Source
natural
A gentle, plant-based antioxidant extract with potential skin-soothing benefits, but research is still early.
Irritation
low
Source
biotech
A gentle plant extract with antioxidant potential, but research on its specific skincare benefits is still limited.
Irritation
low
Source
natural
A natural, finely-milled seed powder that gently exfoliates without harsh microbeads, making it a eco-friendly choice for smooth skin.
Irritation
low
Source
natural
A gentle, plant-based oil that hydrates and softens skin without clogging pores, though research on its specific benefits is still limited.
Irritation
low
Source
natural
A gentle botanical extract with antioxidant potential, but research on its specific benefits for skin is still limited.
Irritation
low
Source
natural
A gentle flower extract with antioxidant potential, but research is limited and benefits are not yet proven in human studies.
Irritation
low
Source
natural
A gentle, plant-derived antioxidant that may help calm skin and defend against environmental stress, though research is still early.
Irritation
low
Source
natural
A mild, antioxidant-rich botanical water that hydrates and soothes, but with limited scientific research backing its specific benefits.
Irritation
low
Source
natural
A gentle, antioxidant-rich leaf extract that may help calm skin and fight free radical damage, though research is still early.
Irritation
low
Source
natural
A gentle, water-like ingredient from flowering plum fruit that adds light hydration and a touch of antioxidants, but lacks strong clinical backing.
Irritation
low
Source
natural
A gentle plant extract with antioxidant potential, but research on its specific benefits for skin is still limited.
Irritation
low
Source
natural
A gentle marine probiotic ingredient that calms irritation and strengthens the skin barrier, ideal for sensitive or reactive skin.
Irritation
low
Source
biotech
A microalgae extract that may help protect skin from environmental stress and support hydration, though research is still early.
Irritation
low
Source
natural
A bacterial ferment extract that may help calm skin and support the barrier, but research is still early and the ingredient name can sound alarming.
Irritation
low
Source
biotech
A gentle botanical oil with early evidence of antioxidant activity, but more research is needed to confirm its benefits for skin.
Irritation
low
Source
natural
Psicose is a gentle, natural humectant that helps hydrate skin and may offer antioxidant benefits, though research in cosmetics is still limited.
Irritation
low
Source
natural
A gentle, plant-based thickener that creates a soothing gel texture, but it can feel sticky if used too high.
Irritation
low
Source
natural
A fern-derived extract with antioxidant potential, but research is limited and benefits are not yet well-established in human skin.
Irritation
low
Source
natural