Beauty ingredients explained in plain English

A potent skin-lightening agent that can fade dark spots but may cause irritation in sensitive skin.

A synthetic scent ingredient that adds fragrance but may cause irritation in sensitive individuals.

A mild, sugar-based humectant that hydrates without irritation, though research on its long-term benefits is still limited.

A synthetic fragrance ingredient with limited safety data; best for those who tolerate synthetic scents.

4-Ethylguaiacol is a synthetic fragrance compound with mild antioxidant properties, but its main role in skincare is scent, not skin benefit.

A synthetic fatty acid with emerging antimicrobial potential, but limited research on long-term skin benefits.

A synthetic fragrance compound with a strong odor; may cause irritation in sensitive individuals.

4-Ethylphenol is primarily a fragrance ingredient with limited direct skincare benefits; it may cause irritation in sensitive individuals at higher concentrations.

A newer synthetic brightener that works by slowing melanin production, but research is still emerging compared to more established options.

4-Hydroxybenzoic acid is a mild antioxidant and preservative helper that is generally safe but can cause rare irritation in sensitive skin.

4-Hydroxybutyl acrylate is a synthetic monomer used in polymer ingredients for nail and adhesive cosmetics, but it is rarely present as a standalone ingredient in leave-on skincare.

A synthetic floral scent ingredient that is generally safe at low levels but offers no skincare benefit.

A synthetic fragrance ingredient that adds scent but offers no skin benefit and may cause irritation in sensitive individuals.

A synthetic fragrance ingredient that adds a pleasant floral scent but offers no skin benefit and may be a minor sensitizer for very sensitive individuals.

A synthetic scent ingredient that adds a fresh note but offers no skincare benefit and may cause sensitivity in some people.

4-Methylbenzaldehyde is a synthetic fragrance ingredient that can add a cherry-almond scent but may cause skin irritation in sensitive individuals.

A synthetic UVB filter that is effective but controversial due to potential endocrine-disrupting effects, leading to bans in some countries.

A synthetic scent ingredient that adds a buttery or caramel-like aroma but may cause irritation in sensitive individuals.

A synthetic fragrance ingredient with limited safety data; best avoided by those with sensitive skin or fragrance allergies.

A synthetic fragrance ingredient that adds a floral, almond-like scent but may cause skin sensitivity in some people.

A synthetic pH adjuster that helps stabilize product formulas but offers no direct skin benefit and may cause irritation in sensitive individuals.

4-Terpineol is a key active in tea tree oil that helps fight acne-causing bacteria and calm redness, but it can be irritating at high concentrations.

A synthetic fragrance ingredient that adds a pleasant scent but may cause skin irritation in sensitive individuals.

A synthetic fragrance ingredient that adds a woody scent but may cause skin irritation in sensitive individuals, especially at higher concentrations.

A synthetic fragrance ingredient that provides a woody scent; generally considered safe at low concentrations but may cause irritation in sensitive individuals.

A synthetic floral fragrance ingredient that can cause skin allergies in sensitive individuals; best avoided if you have fragrance sensitivities.

A synthetic solvent and fragrance ingredient with limited safety data; best avoided in leave-on products due to potential skin irritation and environmental concerns.

A synthetic scent molecule that adds a fresh, citrus note but may cause skin irritation in sensitive individuals.

A synthetic antioxidant that may help calm skin and fight free radicals, but research is still early.

5-Hexen-2-One is a synthetic fragrance ingredient with limited safety data; it may cause skin irritation in sensitive individuals.

5-Melozol is a synthetic peptide that may help firm and smooth skin, but research is limited and it is not widely studied in peer-reviewed human trials.

5-Melozol Acetate is a synthetic compound that may help improve skin firmness and reduce fine lines, but research is still emerging and it is not as widely studied as more established anti-aging ingredients.

A synthetic scent ingredient that adds a fruity note but offers no skincare benefit and may be a concern for fragrance-sensitive individuals.

A synthetic floral scent that can cause skin reactions in sensitive individuals, but is generally safe at low levels.

A synthetic scent ingredient that adds a floral note but may cause irritation in sensitive individuals.

A synthetic scent ingredient that adds a caramel-like aroma but offers no skincare benefits and may trigger sensitivity in some individuals.

5-Nonen-2-One is a synthetic fragrance ingredient with limited safety data; it may cause skin irritation in sensitive individuals.

A synthetic fragrance compound that adds scent but offers no skincare benefits and may cause irritation in sensitive individuals.

A synthetic preservative helper that boosts formula stability but offers no direct skin benefit.

A synthetic scent ingredient that adds a pleasant floral note but offers no skincare benefits and may cause sensitivity in some people.

A strong synthetic preservative that effectively fights microbes but may cause skin irritation in sensitive individuals.

A lab-made antioxidant with early promise for evening skin tone, but human studies are still scarce.

A synthetic fragrance that adds a sweet scent but may cause skin sensitivity in some people.

6-Methylquinoline is a synthetic fragrance ingredient that adds a warm, woody scent to products, but may cause skin irritation in sensitive individuals.

A synthetic fragrance ingredient that adds scent but offers no skincare benefits; may cause irritation in sensitive individuals.

A synthetic scent ingredient that adds a pleasant floral note but offers no skincare benefits and may cause sensitivity in some people.

A synthetic scent ingredient that adds a pleasant floral note but offers no skincare benefit.

A skin-friendly cholesterol derivative that helps reinforce the skin barrier and acts as a building block for vitamin D3 when exposed to UV light.

A gentle, oil-soluble derivative of provitamin D3 that may help support skin barrier function, though human evidence is still limited.

A woody fragrance ingredient that is generally safe at low concentrations but offers no skincare benefit beyond scent.

A synthetic fragrance ingredient that adds a fresh scent but offers no skincare benefits and may irritate sensitive skin.

A synthetic fragrance ingredient that adds scent but offers no skincare benefit; may cause irritation in sensitive individuals.

9-Decenal is a synthetic fragrance ingredient that adds a fresh, citrusy note to products but offers no direct skincare benefit.

A synthetic fragrance ingredient that adds a fresh, fruity scent but offers no skincare benefits and may cause sensitivity in some individuals.

A synthetic fragrance ester that adds a pleasant scent to products; generally safe at low concentrations but may cause sensitivity in some individuals.

A natural exfoliant from abalone shells that gently polishes skin but has limited research and may be too abrasive for sensitive skin.

A gentle plant extract with antioxidant and soothing potential, but research is still early and benefits are not yet proven in large human studies.

Abietic acid is a pine-derived compound with promising anti-acne and anti-inflammatory benefits, but it may cause irritation or clog pores in sensitive skin.

A gentle, plant-based fatty alcohol that softens skin and may help active ingredients absorb better, but it's less common and less studied than alternatives like cetyl alcohol.

A gentle, plant-based extract with early evidence of soothing and antioxidant benefits, but more research is needed to confirm its effectiveness in skincare.