A gentle emulsifier and foam booster that helps blend oil and water in cleansers, but may cause mild irritation for sensitive skin.
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
A gentle emulsifier and foam booster that helps blend oil and water in cleansers, but may cause mild irritation for sensitive skin.
Irritation
moderate
Source
semi-synthetic
A gentle, shea-derived surfactant that cleanses without stripping, making it a good choice for sensitive or dry skin.
Irritation
low
Source
semi-synthetic
A gentle conditioning ingredient that helps soften and detangle hair without heavy buildup.
Irritation
low
Source
semi-synthetic
A gentle conditioning ingredient derived from shea butter that helps reduce static and soften hair without heavy buildup.
Irritation
low
Source
semi-synthetic
A gentle, plant-based antioxidant extract that may help calm skin and defend against environmental stress, though research is still emerging.
Irritation
low
Source
natural
A gentle, nourishing extract from shea nuts that helps soften and soothe the skin without clogging pores.
Irritation
low
Source
natural
A gentle, natural exfoliating powder from shea nut shells, ideal for physical scrubs without harsh microplastics.
Irritation
low
Source
natural
Shea oil is a gentle, non-greasy moisturizer that softens skin and helps restore its natural barrier without clogging pores.
Irritation
low
Source
natural
A gentle, antioxidant-rich extract from shea nut leftovers that helps soothe and protect skin without the heavy feel of shea butter.
Irritation
low
Source
natural
Conditioning Agent
SHEEP ADIPOSE STROMAL CELL CONDITIONED MEDIA
An exotic, high-tech ingredient with limited human research; may offer anti-aging benefits but raises ethical and safety questions.
Irritation
moderate
Source
biotech
A novel biotech ingredient that may support skin repair, but human evidence is still limited.
Irritation
low
Source
biotech
Sheep milk is a gentle, naturally moisturizing ingredient that can soothe and soften skin, but it's not a miracle cure and may not suit those with dairy allergies.
Irritation
low
Source
natural
A mushroom extract with antioxidant potential, but research is limited and benefits are not well-established in human skin.
Irritation
low
Source
natural
A novel ingredient from sheep skin that may support skin repair, but research is very limited and it's not a proven must-have.
Irritation
low
Source
biotech
A gentle plant extract with antioxidant potential, but research on its skincare 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
A gentle, aromatic floral water that offers mild soothing and antioxidant benefits, but research on its specific skincare effects is still limited.
Irritation
low
Source
natural
Shellac is a natural resin that creates a hard, glossy film in nail polishes and some hair and lip products, but it's not a common skincare ingredient.
Irritation
low
Source
natural
A gentle, plant-derived water that may help calm irritation and provide antioxidant protection, but research is still early.
Irritation
low
Source
natural
A gentle, antioxidant-rich fruit water that can help refresh and protect the skin, but its benefits are less concentrated than a pure extract.
Irritation
low
Source
natural
Soothing agent
LENTINUS EDODES/LICORICE ROOT EXTRACT FERMENT FILTRATE
A gentle fermented blend that may help calm skin and provide antioxidant support, though research is still emerging.
Irritation
low
Source
natural
A gentle, antioxidant-rich mushroom extract that helps soothe and protect skin from environmental stress.
Irritation
low
Source
natural
A gentle, antioxidant-rich fungal extract that may help calm skin and defend against environmental stress.
Irritation
low
Source
natural
A gentle, antioxidant-rich mushroom ferment that may help calm skin and defend against environmental stress.
Irritation
low
Source
natural
A next-generation retinoid designed to deliver anti-aging benefits with less irritation than traditional retinol.
Irritation
low
Source
semi-synthetic
A gentle, plant-based AHA that exfoliates and provides antioxidant benefits, suitable for most skin types including sensitive skin.
Irritation
low
Source
natural
A lab-made peptide that aims to mimic the skin-firming effects of shikimic acid, but clinical data is still limited.
Irritation
low
Source
semi-synthetic
A synthetic peptide that aims to calm skin reactivity and reduce the look of redness, but clinical evidence is still limited.
Irritation
low
Source
synthetic
A lab-made peptide that may help firm skin and soften lines, but human studies are limited.
Irritation
low
Source
synthetic
A synthetic peptide that may help firm skin and soften wrinkles, with low irritation potential.
Irritation
low
Source
synthetic
A lab-made peptide that may help smooth wrinkles and improve skin firmness, but human studies are still limited.
Irritation
low
Source
synthetic
A gentle botanical extract with antioxidant potential, but research is limited and benefits are not yet well-established.
Irritation
low
Source
natural
Shinorine is a natural, algae-derived UV filter and antioxidant that helps protect skin from sun damage without the irritation of some synthetic filters.
Irritation
low
Source
natural
A gentle, hydrating birch sap extract that soothes and refreshes skin without clogging pores.
Irritation
low
Source
natural
A gentle, hydrating birch sap that helps soothe and moisturize skin with natural minerals and antioxidants.
Irritation
low
Source
natural
A gentle, hydrating sap from birch trees that may help soothe and lightly moisturize the skin.
Irritation
low
Source
natural
A gentle, antioxidant-rich fruit water that adds a touch of freshness and protection to skincare formulas, but research on its specific benefits is still limited.
Irritation
low
Source
natural
A gentle, plant-derived antioxidant that may help calm skin and fight free radical damage, though research is still emerging.
Irritation
low
Source
natural
A nourishing, plant-based butter that helps soften and protect the skin without clogging pores.
Irritation
low
Source
natural
A nourishing, non-greasy butter that softens skin and helps lock in moisture without clogging pores.
Irritation
low
Source
natural
A gentle, antioxidant-rich citrus extract that may help brighten and soothe skin, though research is still emerging.
Irritation
low
Source
natural
A gentle citrus peel extract that may help protect skin from environmental stress, though research is still early.
Irritation
low
Source
natural
Sialyllactose is a gentle, milk-derived sugar that helps hydrate skin and support a healthy microbiome, but research on its cosmetic benefits is still emerging.
Irritation
low
Source
natural
A gentle botanical extract that may help calm skin and fight free radicals, but research is still early.
Irritation
low
Source
natural
A gentle, antioxidant-rich plant extract that may help calm skin and fight free radical damage, though research is still emerging.
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 is limited and benefits are not well-established.
Irritation
low
Source
natural
A gentle botanical extract with antioxidant potential, but research is very limited and benefits are not well-established.
Irritation
low
Source
natural
A gentle, lab-grown plant extract that may help protect skin from environmental stress and support a more even tone.
Irritation
low
Source
biotech
A gentle, antioxidant-rich botanical extract that helps protect skin from environmental stress and supports a healthy-looking complexion.
Irritation
low
Source
natural
A plant stem cell extract that may help protect skin cells from environmental stress, but human evidence is still limited.
Irritation
low
Source
biotech
A gentle, antioxidant-rich fern extract that may help calm stressed skin, though human studies are limited.
Irritation
low
Source
natural
A gentle plant extract with antioxidant potential, but research on its specific skin benefits is still limited.
Irritation
low
Source
natural
Siberian Fir Needle Oil adds a fresh, woodsy scent to products but can be irritating for sensitive skin, especially at higher concentrations.
Irritation
moderate
Source
natural
Siberian Fir Oil adds a fresh, pine-like scent to products but can be irritating for sensitive skin, especially at high concentrations.
Irritation
moderate
Source
natural
A gentle, antioxidant-rich plant extract from Siberian ginseng that may help calm skin and defend against environmental stress.
Irritation
low
Source
natural
A gentle antioxidant-rich root extract that may help calm skin and defend against environmental stress.
Irritation
low
Source
natural
A gentle, antioxidant-rich root water that helps soothe and protect skin from environmental stress.
Irritation
low
Source
natural
A gentle botanical extract from Siberian ginseng stems that helps protect skin from environmental stress and may calm irritation.
Irritation
low
Source
natural
A gentle, antioxidant-rich plant extract that may help calm skin and protect against environmental stress, though research is still emerging.
Irritation
low
Source
natural