A gentle seaweed extract that helps hydrate and calm the skin, with early research suggesting antioxidant benefits.
Irritation
low
Source
natural
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 seaweed extract that helps hydrate and calm the skin, with early research suggesting antioxidant benefits.
Irritation
low
Source
natural
A gentle, hydrating seaweed water that adds light moisture and soothing benefits, ideal for sensitive or dehydrated skin.
Irritation
low
Source
natural
Eperua Falcata Bark Extract is a gentle botanical antioxidant that may help calm skin and protect against environmental stress, though research is still emerging.
Irritation
low
Source
natural
Ephedra Distachya Extract is a botanical ingredient with potential antioxidant benefits, but its use in skincare is not well-studied and may pose irritation risks for sensitive skin.
Irritation
moderate
Source
natural
A plant root extract with potential soothing and antimicrobial benefits, but limited research and possible irritation risk for sensitive skin.
Irritation
moderate
Source
natural
Ephedra Sinica Water may offer soothing and antimicrobial benefits, but its safety in skincare is not well-established and it may cause irritation for sensitive skin.
Irritation
moderate
Source
natural
Microbiome Modulator
EPIDERMIDIBACTERIUM KERATINI FERMENT FILTRATE
A promising microbiome-friendly ingredient that may help strengthen the skin barrier and calm sensitivity, though research is still emerging.
Irritation
low
Source
biotech
A powerful antioxidant from green tea that helps protect skin from environmental damage and soothes irritation.
Irritation
low
Source
natural
A modified green tea antioxidant that offers better stability and water solubility than plain EGCG, making it a gentle choice for daytime protection.
Irritation
low
Source
semi-synthetic
A gentle, antioxidant-rich alpine plant extract that may help calm redness and support skin barrier function, though human studies are limited.
Irritation
low
Source
natural
A gentle botanical extract that may help calm redness and provide antioxidant support, though research is still emerging.
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 plant extract with antioxidant potential, but limited skincare-specific research means its benefits are not yet well-established.
Irritation
low
Source
natural
A gentle, antioxidant-rich plant extract from a rare cactus that may help soothe and protect skin, though human research is still limited.
Irritation
low
Source
natural
A modified juniper extract that may offer antioxidant benefits, but its epoxidized form is less studied and may pose irritation risks for sensitive skin.
Irritation
moderate
Source
semi-synthetic
A semi-synthetic wood extract with antioxidant potential, but research is limited and it may not be a standout ingredient for most routines.
Irritation
low
Source
semi-synthetic
A modified oil that helps formulas stay flexible and stable, but offers little direct skin benefit.
Irritation
low
Source
semi-synthetic
A gentle emollient from soy that helps products glide on smoothly, but it's not a star hydrator or active ingredient.
Irritation
low
Source
semi-synthetic
A metallic pigment that adds sparkle but may raise concerns for inhalation or skin sensitivity in some formulations.
Irritation
low
Source
synthetic
A synthetic film former that helps makeup last longer and resist water, but may feel stiff or heavy on the skin.
Irritation
low
Source
synthetic
Epoxycyclododecane is a synthetic fragrance ingredient that adds a woody scent, but it may cause skin irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
A silicone film-former that helps makeup and sunscreen last longer and resist water, but may feel heavy on some skin types.
Irritation
low
Source
synthetic
Epoxyguaiène is a rare, natural fragrance ingredient that adds a woody, ambery note and helps stabilize scent blends, but it's not a functional skincare active.
Irritation
low
Source
natural
Epoxypinane is a synthetic pine-scented fragrance ingredient with limited safety data; it may cause irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
A synthetic conditioning agent that reduces static and softens hair, but may cause irritation for sensitive scalps.
Irritation
moderate
Source
synthetic
A reactive chemical used to make other ingredients more conditioning, but rarely appears as a standalone ingredient in consumer products.
Irritation
moderate
Source
synthetic
A gentle synthetic polymer that helps products spread smoothly and stay put, with low irritation risk.
Irritation
low
Source
synthetic
A synthetic polymer that helps products stay put and feel smooth, but offers no active skincare benefit.
Irritation
low
Source
synthetic
Equi Lipida is a gentle, lipid-rich ingredient that helps restore the skin barrier and lock in moisture, making it a good choice for dry or sensitive skin.
Irritation
low
Source
natural
Equol is a gentle antioxidant that may help even skin tone and support collagen, but human skincare studies are still limited.
Irritation
low
Source
biotech
Erbium Chloride is a rare-earth salt with very limited cosmetic application; its safety and efficacy in skincare are not well-documented.
Irritation
moderate
Source
synthetic
A gentle, little-studied botanical oil that may offer antioxidant benefits, but lacks robust research to confirm efficacy.
Irritation
low
Source
natural
A fragrant botanical oil with potential soothing benefits, but limited research and a risk of skin irritation for sensitive individuals.
Irritation
moderate
Source
natural
A gentle botanical extract with antioxidant and soothing potential, though research is still emerging.
Irritation
low
Source
natural
A gentle, antioxidant-rich botanical extract with traditional roots, but modern research is still limited.
Irritation
low
Source
natural
A gentle, lightweight oil from an Australian native plant that hydrates and soothes skin without clogging pores.
Irritation
low
Source
natural
A fragrant Australian wood oil with a calming scent, but limited research on direct skincare benefits and moderate irritation potential.
Irritation
moderate
Source
natural
Ergocalciferol (vitamin D2) may support skin health and calm inflammation, but research in topical skincare is still emerging and it is less potent than vitamin D3.
Irritation
low
Source
natural
Ergosterol is a gentle, yeast-derived sterol that may support skin barrier function and antioxidant defense, but human skincare research is still limited.
Irritation
low
Source
natural
Ergosterol endoperoxide is a promising but under-researched antioxidant that may help calm skin and fight free radicals, but it's not yet a mainstream ingredient.
Irritation
low
Source
natural
Ergothioneine is a gentle, stable antioxidant that defends skin against pollution and UV damage without irritation, making it a smart addition to daytime skincare.
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 botanical extract with antioxidant potential, but research is limited—best as a supporting ingredient in soothing formulations.
Irritation
low
Source
natural
A gentle botanical extract with antioxidant potential, but research on its skincare benefits is still limited.
Irritation
low
Source
natural
A natural insect wax that helps thicken and stabilize cosmetic formulas with a low risk of irritation.
Irritation
low
Source
natural
Eriodictyol is a plant-derived antioxidant that may help protect skin from environmental damage and support a more even complexion, though human studies are limited.
Irritation
low
Source
natural
A gentle, hydrating sap from birch trees that may help soothe and lightly moisturize the skin, but scientific evidence is still limited.
Irritation
low
Source
natural
A gentle, plant-based antioxidant that may help calm skin and defend against environmental stress, though research is still early.
Irritation
low
Source
natural
Erucalkonium chloride is an effective preservative and antistatic agent for hair products, but it may cause mild irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
Erucamide is a synthetic lubricant that improves the glide and feel of makeup and skincare, with a strong safety record at low use levels.
Irritation
low
Source
synthetic
A gentle, effective surfactant that creates rich foam without stripping the skin, making it a great choice for sensitive or dry skin types.
Irritation
low
Source
semi-synthetic
Erucic acid is a gentle fatty acid that helps cleanse and condition skin and hair, but it may be slightly comedogenic for acne-prone individuals.
Irritation
low
Source
natural
Erucyl Arachidate is a gentle, non-greasy emollient that helps soften and smooth skin without clogging pores.
Irritation
low
Source
synthetic
A lightweight, plant-derived emollient that softens skin and improves product texture with a low risk of irritation or clogged pores.
Irritation
low
Source
natural
Erucyl Oleate is a gentle emollient that softens and smooths skin without feeling greasy, making it a good choice for dry or sensitive skin.
Irritation
low
Source
semi-synthetic
Erythorbic acid is a gentler, more stable alternative to L-ascorbic acid that helps brighten skin and fight free radicals.
Irritation
low
Source
synthetic
A gentle flower extract that may help calm skin and fight free radicals, but research is still early.
Irritation
low
Source
natural
A mild, aromatic floral water that offers gentle soothing and antioxidant benefits, but with limited research specific to skincare.
Irritation
low
Source
natural
A gentle botanical extract with antioxidant and soothing potential, though research is still early and benefits are not yet proven in large human studies.
Irritation
low
Source
natural
Erythritol is a gentle, non-irritating humectant that helps hydrate skin without stickiness, making it a great alternative to glycerin for sensitive or acne-prone skin.
Irritation
low
Source
natural