A gentle, antioxidant-rich fermented ingredient that may help calm and protect skin, but more human studies are needed to confirm its benefits.
Irritation
low
Source
biotech
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, antioxidant-rich fermented ingredient that may help calm and protect skin, but more human studies are needed to confirm its benefits.
Irritation
low
Source
biotech
A gentle fermented fruit extract that offers mild exfoliation and antioxidant protection, suitable for most skin types.
Irritation
low
Source
biotech
A gentle, hydrating cactus extract that may help soothe and moisturize skin, but research is limited.
Irritation
low
Source
natural
A safe, non-irritating colorant that also offers mild astringent properties, but its cosmetic benefits beyond tinting are limited.
Irritation
low
Source
synthetic
Ferric chloride is a strong astringent with limited cosmetic use due to high irritation potential and lack of proven skincare benefits.
Irritation
high
Source
synthetic
A safe and widely used blue pigment in cosmetics, but it's purely for color and offers no skincare benefits.
Irritation
low
Source
synthetic
Ferric glycerophosphate is a gentle mineral salt that may offer antioxidant benefits and support skin vitality, but research is still emerging.
Irritation
low
Source
synthetic
A synthetic peptide with iron that may help support skin firmness, but research is still early and benefits are not guaranteed.
Irritation
low
Source
synthetic
Ferric nitrate is a synthetic salt that can act as a colorant or astringent, but it is rarely used in modern skincare due to potential irritation and limited benefits.
Irritation
moderate
Source
synthetic
Ferric sulfate is an effective astringent but can be drying and irritating, especially for sensitive skin.
Irritation
moderate
Source
synthetic
A synthetic blue pigment that adds color to makeup but offers no skincare benefits.
Irritation
low
Source
synthetic
Ferrous ammonium sulfate is a synthetic iron salt used mainly as a colorant or chemical reagent in cosmetics; it is not a skincare active and may cause irritation at higher concentrations.
Irritation
moderate
Source
synthetic
Ferrous aspartate is a form of iron used mainly as a colorant in cosmetics; its skincare benefits are not well-established and it may cause staining.
Irritation
low
Source
synthetic
Ferrous fumarate is a synthetic iron compound used mainly as a pigment in cosmetics; it has no proven skincare benefits and is not a substitute for dietary iron.
Irritation
low
Source
synthetic
Ferrous Glucoheptonate is primarily used as a colorant in cosmetics, offering a subtle iron tone with low irritation potential, but it has limited skincare benefits beyond tinting.
Irritation
low
Source
synthetic
Ferrous gluconate is a gentle iron source that may support antioxidant defenses in skincare, but its benefits are modest and it's more common in color cosmetics than in active treatment products.
Irritation
low
Source
synthetic
Ferrous Lactate is a gentle iron salt used to tint products or support skin appearance, but it is not a major active ingredient.
Irritation
low
Source
synthetic
Ferrous sulfate is primarily used as a colorant or astringent in cosmetics, but it offers little skincare benefit and may cause irritation for sensitive skin.
Irritation
moderate
Source
synthetic
A plant extract with antioxidant potential, but limited human studies and a strong scent that may not suit all formulations.
Irritation
low
Source
natural
A powerful antioxidant that stabilizes vitamin C and E, boosts sun protection, and helps fight visible signs of aging.
Irritation
low
Source
natural
A lab-made peptide-ferulic hybrid that may help firm skin, but human studies are still limited.
Irritation
low
Source
synthetic
A gentle, oil-friendly antioxidant that helps protect skin from environmental stress and supports a more even-looking complexion.
Irritation
low
Source
semi-synthetic
Feverfew extract is a gentle botanical that helps calm redness and protect skin from environmental stress, making it a popular alternative to stronger soothing ingredients.
Irritation
low
Source
natural
Feverfew flower extract is a gentle, antioxidant-rich botanical that helps calm skin and reduce visible redness.
Irritation
low
Source
natural
Feverfew flower powder is a gentle botanical ingredient that helps calm skin and fight free radical damage, making it a popular alternative to stronger soothing agents.
Irritation
low
Source
natural
Feverfew juice is a gentle, antioxidant-rich botanical that can help calm irritated skin and reduce redness.
Irritation
low
Source
natural
Feverfew water is a gentle, antioxidant-rich botanical that helps calm and soothe sensitive skin without the irritation risk of the whole plant.
Irritation
low
Source
natural
A lightweight, fast-absorbing oil rich in linoleic acid and vitamin E, great for dry or normal skin without clogging pores.
Irritation
low
Source
natural
A gentle botanical root extract with antioxidant potential, but research is limited and it's not a standout ingredient.
Irritation
low
Source
natural
Anti-Aging Agent
HUMAN FIBROBLAST INDUCED PLURIPOTENT CELL CULTURE CONDITIONED MEDIA
A cutting-edge biotech ingredient that may support skin repair and reduce signs of aging, but human research is still limited and products are often very expensive.
Irritation
low
Source
biotech
Anti-Aging Agent
HUMAN FIBROBLAST INDUCED PLURIPOTENT CELL EXTRACT
A cutting-edge biotech ingredient that may support skin cell communication, but research is still early and products are very expensive.
Irritation
low
Source
biotech
Anti-aging
HUMAN NEONATAL FIBROBLAST/KERATINOCYTE CONDITIONED MEDIA
A high-tech, cell-derived ingredient that delivers a cocktail of skin-identical proteins, but evidence is still emerging and products are very expensive.
Irritation
low
Source
biotech
A gentle film-forming polymer that improves product feel and wear, but offers no active skincare benefits on its own.
Irritation
low
Source
semi-synthetic
Fibronectin is a skin-supporting protein that may help with moisture retention and a smoother appearance, but evidence in cosmetic use is still emerging.
Irritation
low
Source
biotech
Ficin is a plant-derived enzyme that gently exfoliates skin by dissolving dead cells, but it can be irritating if left on too long or used too frequently.
Irritation
moderate
Source
natural
A gentle botanical extract with antioxidant potential, but research on its topical benefits is still limited.
Irritation
low
Source
natural
A gentle botanical extract with antioxidant potential, but research is limited and benefits are not yet well-established in human studies.
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 plant-root extract with antioxidant potential, but research is limited and benefits are not yet well-established in human skin.
Irritation
low
Source
natural
A gentle botanical extract with limited research, possibly offering soothing and antioxidant benefits for sensitive skin.
Irritation
low
Source
natural
A gentle plant-based antioxidant extract with limited but promising research, best for those seeking natural skincare ingredients.
Irritation
low
Source
natural
A gentle botanical extract that may help calm skin and fight free radical damage, but research is still early.
Irritation
low
Source
natural
A gentle plant extract with antioxidant potential, but research is limited and benefits are not well-established.
Irritation
low
Source
natural
A gentle botanical extract with soothing and antioxidant potential, but research is limited and benefits are not well-established.
Irritation
low
Source
natural
A gentle, fermented ingredient that helps smooth skin texture and support a healthy-looking complexion without harsh scrubbing.
Irritation
low
Source
biotech
A gentle botanical extract with antioxidant potential, but research is limited and benefits are not well-established.
Irritation
low
Source
natural
A gentle plant extract with antioxidant potential, but research is limited and benefits are not yet well-established.
Irritation
low
Source
natural
Fig Bud Extract is a gentle, antioxidant-rich botanical that may help soothe and protect skin, but research is still emerging.
Irritation
low
Source
natural
A gentle, fermented fig extract that hydrates and provides antioxidant benefits, suitable for most skin types.
Irritation
low
Source
biotech
Fig extract is a gentle antioxidant-rich ingredient that helps protect skin from environmental stress while offering mild soothing benefits.
Irritation
low
Source
natural
Fig fruit juice is a gentle, hydrating ingredient with antioxidant benefits, but its effectiveness in skincare is supported more by traditional use than robust clinical studies.
Irritation
low
Source
natural
A gentle, natural exfoliating powder with antioxidant benefits, but research on its cosmetic efficacy is still limited.
Irritation
low
Source
natural
A gentle, plant-derived antioxidant that may help protect skin from environmental stress, though research is still early.
Irritation
low
Source
biotech
A gentle plant extract with antioxidant potential, but research on its specific skin benefits is still limited.
Irritation
low
Source
natural
Fig plant juice is a gentle, antioxidant-rich ingredient that may help soothe and protect skin, but research is still early.
Irritation
low
Source
natural
Fig Seed offers gentle physical exfoliation from a natural source, but research on its specific benefits is limited compared to more studied exfoliants.
Irritation
low
Source
natural
Fig Tree Juice is a gentle, hydrating botanical extract with antioxidant potential, but research on its skincare benefits is still limited.
Irritation
low
Source
natural
A gentle plant extract with antioxidant and soothing potential, but research is still early and benefits are not yet proven in large human studies.
Irritation
low
Source
natural
A gentle botanical extract that may help calm irritated skin and provide antioxidant protection, though research is still emerging.
Irritation
low
Source
natural
A gentle marine extract with potential soothing and antioxidant benefits, but research is limited and sustainability concerns exist.
Irritation
low
Source
natural