Tagetes Erecta Flower Extract

Tagetes erecta (marigold) flower extract is primarily used as a botanical antioxidant/skin-conditioning agent, typically at low concentrations, but it contains multiple bioactive terpenoids and carotenoid-associated fractions that can act as sensitizers in reactive skin. Patch-test and clinical experience with botanicals show a non-trivial risk of irritation or allergic contact dermatitis in eczema-prone or highly sensitized patients, especially in leave-on products and in routines already using other actives. Given patient-safety considerations and the variability of extract composition, I rate it as moderate irritation potential requiring patch testing for sensitive skin. Safety Notes: In commercial skincare, Tagetes erecta (marigold) flower extract is most often used as a minor soothing/antioxidant botanical within multi-extract blends, with effective-in-formula use levels commonly starting around 0.001–0.05% in leave-on creams/serums and similar or lower in rinse-off cleansers due to brief contact time. Higher-strength consumer products (typically “botanical active” serums, after-sun products, and mask/ampoule-style leave-ons) can reach ~0.5–2.0% when the extract is a named hero ingredient or when suppliers recommend higher dosing for standardized lutein/phenolic content; above this is uncommon in OTC due to solubility, odor/color impact, and sensitization/irritancy risk typical of concentrated botanical extracts.