Lavender oil adds a pleasant floral scent to skincare but can cause irritation in sensitive skin; use with caution.
Irritation
moderate
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
Lavender oil adds a pleasant floral scent to skincare but can cause irritation in sensitive skin; use with caution.
Irritation
moderate
Source
natural
A gentle, antioxidant-rich plant cell extract that may help calm and protect skin, though research is still emerging.
Irritation
low
Source
biotech
A gentle, aromatic hydrosol that adds a subtle lavender scent and mild soothing feel to skincare, but offers limited active benefits compared to essential oils.
Irritation
low
Source
natural
A fragrant wood oil with a pleasant scent and some antimicrobial potential, but limited research on direct skin benefits and a moderate risk of irritation for sensitive skin.
Irritation
moderate
Source
natural
Lawsone is a natural colorant from henna that stains hair and skin, but it can cause irritation in sensitive individuals and is not approved for use in leave-on cosmetics in some regions.
Irritation
moderate
Source
natural
A gentle, antioxidant-rich blend that may help calm skin and fight free radicals, but benefits vary widely by plant source.
Irritation
low
Source
natural
Leaf oils add natural fragrance to skincare but can be irritating for sensitive skin; patch test recommended.
Irritation
moderate
Source
natural
Leafy spurge extract is a botanical ingredient with potential soothing and antioxidant benefits, but its use in skincare is still emerging and may cause irritation in sensitive individuals.
Irritation
moderate
Source
natural
Leather Coral Extract is a marine antioxidant that may help soothe skin and fight free radicals, but research is limited.
Irritation
low
Source
natural
Lecithin is a gentle, plant-derived emulsifier that helps blend water and oil in formulas while also providing mild hydration and skin barrier support.
Irritation
low
Source
natural
Lecithinamide DEA is a surfactant that helps create rich lather, but it may cause mild irritation for sensitive skin.
Irritation
moderate
Source
semi-synthetic
A gentle, nourishing plant oil that softens skin without feeling heavy, though research on its specific benefits is still limited.
Irritation
low
Source
natural
A gentle, lab-grown root extract that may help calm irritation and defend against environmental stress, though human studies are limited.
Irritation
low
Source
biotech
A gentle botanical extract with traditional use for calming skin, but modern research is still limited.
Irritation
low
Source
natural
Leek extract offers antioxidant benefits and mild soothing effects, but research on its cosmetic use is still emerging.
Irritation
low
Source
natural
Antioxidant
Citrus Limon (Lemon) Fruit Extract / Fucus Serratus Extract
A gentle botanical blend that pairs lemon's antioxidant power with seaweed's soothing hydration, but the research is still emerging.
Irritation
low
Source
natural
Lemon balm extract is a gentle, antioxidant-rich botanical that helps calm skin and fight free radical damage, but its benefits are best supported by traditional use and lab studies rather than large human trials.
Irritation
low
Source
natural
Lemon balm juice is a gentle, antioxidant-rich botanical that helps calm irritated skin and provides mild protection against environmental stress.
Irritation
low
Source
natural
A gentle botanical powder that may help calm irritated skin and provide antioxidant protection, but its effectiveness depends on formulation and concentration.
Irritation
low
Source
natural
A gentle, lab-grown plant cell extract that may help protect skin from environmental stress and calm irritation.
Irritation
low
Source
biotech
A mild, aromatic botanical water that can help calm and refresh the skin, but its benefits are mostly anecdotal and it may cause sensitivity in rare cases.
Irritation
low
Source
natural
A gentle plant-based antioxidant from lemon buds that may help protect skin from environmental stress, but research is limited and it can cause irritation in sensitive individuals.
Irritation
moderate
Source
natural
A gentle, lab-grown lemon extract that may help protect skin from environmental stress, but research is still early.
Irritation
low
Source
biotech
A gentle, antioxidant-rich plant extract that may help protect skin from environmental stress, though research is still early.
Irritation
low
Source
natural
A fragrant botanical water that can refresh and lightly tone skin, but may cause irritation for sensitive types due to natural essential oil components.
Irritation
moderate
Source
natural
Lemon extract can brighten skin and fight free radicals, but its acidity and photosensitizing compounds require careful formulation and sun protection.
Irritation
moderate
Source
natural
A gentle, fragrant extract that adds a light antioxidant boost and a pleasant citrus scent, but its benefits are not as well-studied as other citrus extracts.
Irritation
low
Source
natural
A fragrant essential oil from lemon plant parts that adds a fresh citrus scent and mild astringent feel, but can be irritating for sensitive skin.
Irritation
moderate
Source
natural
A gentle, lightly fragrant hydrosol that can refresh and mildly tone skin, but its benefits are mostly aromatic and sensory rather than deeply therapeutic.
Irritation
low
Source
natural
A gentle botanical extract from lemon tree parts that offers antioxidant benefits and a subtle natural fragrance, but research on its specific effects is still limited.
Irritation
low
Source
natural
Lemon fruit extract offers antioxidant benefits and a fresh scent, but its acidity and photosensitizing compounds require careful formulation to avoid irritation.
Irritation
moderate
Source
natural
Lemon fruit powder offers gentle exfoliation and antioxidant benefits, but its acidity and phototoxicity risk require careful formulation and usage.
Irritation
moderate
Source
natural
Lemon fruit water offers gentle astringent and refreshing benefits but can be mildly irritating for sensitive skin due to natural citric acid and volatile compounds.
Irritation
moderate
Source
natural
Lemon juice extract can brighten skin and tighten pores, but its high acidity and phototoxicity risk make it tricky for everyday use.
Irritation
moderate
Source
natural
Lemon Juice Powder can offer mild brightening and astringent effects, but its acidity and photosensitizing potential require careful formulation and sun protection.
Irritation
moderate
Source
natural
A gentle, plant-derived antioxidant that may help calm skin and protect against environmental stress, though research is still emerging.
Irritation
low
Source
biotech
A gentle botanical extract that provides antioxidant protection and soothing benefits, but research on its topical effects is still emerging.
Irritation
low
Source
natural
Lemon leaf oil adds a fresh citrus scent to products but can be irritating for sensitive skin and has limited research on direct skin benefits.
Irritation
moderate
Source
natural
A fragrant essential oil that adds a fresh lemon scent to products but can be irritating for sensitive skin and may increase sun sensitivity.
Irritation
moderate
Source
natural
A fragrant essential oil that adds a fresh, minty-citrus scent to products but may cause irritation in sensitive skin.
Irritation
moderate
Source
natural
A gentle botanical extract that may help calm skin and add a light herbal scent, but research on its benefits is still limited.
Irritation
low
Source
natural
Lemon Myrtle Leaf Extract is a gentle, antioxidant-rich botanical that can help protect skin from environmental stress while adding a pleasant natural scent to products.
Irritation
low
Source
natural
Lemon Myrtle Leaf Oil adds a fresh citrus scent and may help fight bacteria, but it can be irritating for sensitive skin if used at high concentrations.
Irritation
moderate
Source
natural
Lemon Peel Extract offers antioxidant benefits but can be irritating due to natural acids and photosensitizing compounds.
Irritation
moderate
Source
natural
Lemon Peel Oil adds a fresh citrus scent and mild astringent effects, but it can be irritating and increase sun sensitivity.
Irritation
moderate
Source
natural
Lemon Peel Powder offers gentle physical exfoliation and antioxidant benefits, but its citrus oils can increase sun sensitivity and irritation risk.
Irritation
moderate
Source
natural
Lemon peel water offers a light, refreshing feel and mild astringent action, but can be irritating for sensitive skin due to natural citrus compounds.
Irritation
moderate
Source
natural
A gentle, plant-based wax from lemon peels that helps thicken and stabilize creams and balms without common irritation.
Irritation
low
Source
natural
Lemon Thyme Extract is a gentle botanical antioxidant that may help calm skin and protect against environmental stress, though research on its cosmetic benefits is still emerging.
Irritation
low
Source
natural
A gentle, antioxidant-rich botanical extract that can help calm skin and fight environmental stress, but its benefits are modest and best as part of a broader formulation.
Irritation
low
Source
natural
A mild botanical extract that may offer antioxidant and soothing benefits, but research in skincare is still limited.
Irritation
low
Source
natural
A mild, pleasantly scented botanical water that can offer gentle toning and a refreshing feel, but with limited research on specific skincare benefits.
Irritation
low
Source
natural
A gentle, lab-grown antioxidant that may help calm skin and fight free radical damage, but human studies are limited.
Irritation
low
Source
biotech
Lemon Verbena Leaf Oil adds a pleasant lemony scent to products but may cause skin irritation in sensitive individuals, especially at higher concentrations.
Irritation
moderate
Source
natural
A gentle, aromatic botanical water that adds a light citrus scent and mild astringent feel, but its skincare benefits beyond fragrance are not well-studied.
Irritation
low
Source
natural
A gentle, lab-grown plant cell extract that may help protect skin from environmental stress and support a calmer complexion.
Irritation
low
Source
biotech
Lemon verbena oil adds a pleasant lemony scent to products but has limited research on skin benefits and may cause irritation in sensitive individuals.
Irritation
moderate
Source
natural
A gentle, aromatic water that adds a light citrus scent and mild astringent feel, but lacks strong clinical evidence for major skin benefits.
Irritation
low
Source
natural
A fragrant essential oil with mild antimicrobial potential, but its strong aroma and possible skin sensitivity limit its use in skincare.
Irritation
moderate
Source
natural
Lemongrass extract can help tone oily skin and provide a fresh scent, but it may irritate sensitive skin due to its natural citral content.
Irritation
moderate
Source
natural