A gentle lichen-derived antioxidant that may help calm skin and fight free radical damage, though research is still emerging.
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 lichen-derived antioxidant that may help calm skin and fight free radical damage, though research is still emerging.
Irritation
low
Source
natural
A gentle, antioxidant-rich botanical extract that may help calm skin, but scientific research on its cosmetic benefits is still limited.
Irritation
low
Source
natural
Leucine is a gentle amino acid that supports skin hydration and barrier health, making it a safe addition to most routines.
Irritation
low
Source
natural
A gentle, probiotic-based ingredient that helps hydrate and strengthen the skin barrier.
Irritation
low
Source
biotech
A gentle fermented ingredient that exfoliates and provides antioxidant benefits without the harshness of traditional acids.
Irritation
low
Source
biotech
Preservative booster
LEUCONOSTOC/RADISH ROOT FERMENT LYSATE FILTRATE
A gentle, naturally derived ingredient that helps preserve formulas while offering mild skin-conditioning benefits.
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
Levan is a gentle, biotech-derived humectant that helps hydrate and soothe skin while forming a lightweight protective film.
Irritation
low
Source
biotech
A gentle sugar-based blend that hydrates and helps form a protective layer on skin, suitable for most skin types.
Irritation
low
Source
natural
A plant-derived compound with early research suggesting antioxidant and anti-inflammatory benefits, but not yet widely studied in cosmetic formulations.
Irritation
low
Source
natural
A mild, plant-derived exfoliant that gently smooths skin without the sting of stronger acids.
Irritation
low
Source
natural
A fragrant botanical extract with mild skin-conditioning potential, but limited research on its cosmetic benefits.
Irritation
low
Source
natural
A fragrant leaf oil that adds a sweet, vanilla-like scent to products, but has limited research on skin benefits and may cause irritation in sensitive individuals.
Irritation
moderate
Source
natural
A lab-grown licorice extract that helps calm irritation and defend against environmental stress without the variability of field-grown plants.
Irritation
low
Source
biotech
A gentle, lab-grown licorice extract that may help calm skin and fight free radical damage, though human studies are limited.
Irritation
low
Source
biotech
A gentle, lab-grown licorice extract that may help calm redness and protect skin from environmental stress.
Irritation
low
Source
biotech
A gentle, plant-based extract that helps calm redness and provides antioxidant protection, ideal for sensitive or reactive skin.
Irritation
low
Source
natural
A gentle, fermented licorice root extract that helps calm redness and even skin tone without harsh chemicals.
Irritation
low
Source
natural
Licorice root juice is a gentle, natural ingredient that helps calm redness and even out skin tone without harsh side effects.
Irritation
low
Source
natural
Licorice root oil is a gentle, antioxidant-rich oil that helps calm irritation and even out skin tone without clogging pores.
Irritation
low
Source
natural
A gentle, plant-derived antioxidant that helps calm redness and even out skin tone without irritation.
Irritation
low
Source
natural
A gentle, plant-based water that helps calm redness and provides antioxidant protection without stripping the skin.
Irritation
low
Source
natural
A gentle, antioxidant-rich extract from licorice sprouts that helps calm redness and protect skin from environmental stress.
Irritation
low
Source
natural
Ligninase is a gentle enzyme exfoliant that helps brighten skin by breaking down dead surface cells, but research on its cosmetic benefits is still limited.
Irritation
low
Source
biotech
A gentle wax ester that softens skin and reinforces the moisture barrier without clogging pores.
Irritation
low
Source
semi-synthetic
A mushroom extract with promising antioxidant and soothing potential, but research in skincare is still early.
Irritation
low
Source
natural
Lignum powder is a natural wood-based exfoliant that gently sloughs dead skin, but its particle size and source can affect how abrasive it feels.
Irritation
moderate
Source
natural
A gentle botanical extract with antioxidant potential, but research is limited and benefits are not yet well-established in cosmetic science.
Irritation
low
Source
natural
A gentle botanical extract with antioxidant and soothing potential, though research is limited compared to more studied plant extracts.
Irritation
low
Source
natural
A gentle plant extract with antioxidant and soothing potential, though research is still emerging and benefits may vary by formulation.
Irritation
low
Source
natural
A gentle botanical extract that may offer antioxidant benefits and a pleasant floral scent, but research on its skincare effects is still limited.
Irritation
low
Source
natural
A gentle, lightly fragrant floral water that adds a pleasant scent and mild soothing feel to skincare, but has limited proven benefits beyond hydration.
Irritation
low
Source
natural
A gentle, lab-grown plant extract that may help shield skin from environmental stress and support a more even tone.
Irritation
low
Source
biotech
A gentle, plant-based antioxidant that may help protect skin from environmental stress, though research is still early.
Irritation
low
Source
biotech
A gentle, plant-derived antioxidant that may help protect skin from environmental stress, though human studies are limited.
Irritation
low
Source
biotech
A gentle, antioxidant-rich flower extract from the Himalayas that may help soothe and protect skin, though research is still early.
Irritation
low
Source
natural
A gentle botanical extract that may help calm skin and fight free radicals, but research is still limited.
Irritation
low
Source
natural
A gentle, plant-derived ingredient that may help calm irritation and provide light hydration, but research on its specific benefits is still limited.
Irritation
low
Source
natural
A mild botanical extract that may help calm skin and provide antioxidant protection, but research is limited.
Irritation
low
Source
natural
A gentle, fragrant flower oil that adds a light emollient feel and a subtle floral scent, but research on its specific skin benefits is limited.
Irritation
low
Source
natural
Lily Hybrid Extract is a gentle botanical ingredient that may help soothe skin and provide antioxidant protection, but research is limited.
Irritation
low
Source
natural
A gentle, lab-grown plant extract that may help protect skin from environmental stress, but research is still early.
Irritation
low
Source
biotech
A fragrant flower extract with mild antioxidant potential, but its main role in skincare is scent—and it can be irritating for sensitive skin.
Irritation
moderate
Source
natural
A gentle botanical extract with antioxidant potential, but limited human studies and a known skin sensitization risk in some individuals.
Irritation
moderate
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 botanical extract blend that may help calm skin and fight free radicals, but research is limited.
Irritation
low
Source
natural
A gentle botanical blend that may help calm skin and provide antioxidant support, though research is limited.
Irritation
low
Source
natural
A gentle botanical extract that adds a light citrus scent and a touch of antioxidant support, but research on its direct skin benefits is limited.
Irritation
low
Source
natural
Lime fruit extract adds a fresh citrus scent and mild antioxidant benefits, but its potential for skin irritation means it's best for those without sensitive skin.
Irritation
moderate
Source
natural
Lime oil adds a fresh citrus scent and some antioxidant activity, but it can be irritating for sensitive skin and may increase sun sensitivity.
Irritation
moderate
Source
natural
Lime fruit water offers a light, refreshing feel and mild astringent action, but its natural acidity and phototoxic potential require careful formulation.
Irritation
moderate
Source
natural
Lime leaf extract offers antioxidant benefits and a light astringent effect, but may cause irritation in sensitive skin due to natural citrus compounds.
Irritation
moderate
Source
natural
Lime peel oil adds a bright citrus scent to products but can be irritating for sensitive skin and increases sun sensitivity.
Irritation
moderate
Source
natural
Lime peel powder offers gentle physical exfoliation and a bright scent, but its citrus oils can cause irritation or photosensitivity in some people.
Irritation
moderate
Source
natural
Lime Peel Water adds a fresh citrus scent and mild astringency to products, but its fragrance can be irritating for sensitive skin.
Irritation
moderate
Source
natural
A gentle, antioxidant-rich oil that hydrates and soothes skin without clogging pores.
Irritation
low
Source
natural
A gentle, plant-derived emollient that helps strengthen the skin barrier and offers antioxidant protection without clogging pores.
Irritation
low
Source
natural
A gentle herbal extract with antioxidant potential, but research is still emerging and benefits are not yet well-established in human skin.
Irritation
low
Source
natural
Limonene adds a fresh citrus scent but can be a skin sensitizer, especially when oxidized.
Irritation
moderate
Source
natural
A plant-based antioxidant extract that may help calm skin and fight free radicals, though research is still early.
Irritation
low
Source
natural