Curcuma Longa (Turmeric) Root Extract

Tolerability and safety

Irritation potential

Low

Allergen risk

Low

Pregnancy

Unknown

About this ingredient

Curcuma Longa Root Extract is an extract from the rhizomes of a Zingiberaceae plant. The main active is curcumin (1-3% of crude extract). In Indian Ayurveda and Southeast Asian traditional medicine turmeric has been used as an anti-inflammatory and wound-healing agent for millennia. Mechanism. Curcumin suppresses NF-κB – a key inflammation transcription factor, inhibits COX-2 and iNOS. Antioxidant activity is comparable to vitamin C in vitro. Claimed brightening effect – via tyrosinase inhibition (Schmid 2018). Where applied. Ayurvedic and Asian brands (Kiehl's Turmeric & Cranberry Seed Energizing Radiance Mask, Goldface, Sundari), masks, anti-inflammation and anti-pigmentation serums. In Spain it appears in niche lines; rare in mass retail. Evidence base. The Vaughn 2016 systematic review describes 18 studies of topical curcumin in acne, psoriasis, dermatitis – results are mixed. Curcumin's topical bioavailability is low (<5% stratum-corneum penetration); most of the effect is attributed to oral or intramuscular routes. Modern technologies (nanosomes, cyclodextrins) improve penetration, but clinical evidence remains modest. Safety. May leave yellow stains on skin and clothes due to curcumin's pigmentary properties (especially on light skin). Sensitises rarely, but contact dermatitis has been reported (Lopez-Tarruella 2011). Pregnancy and lactation – use with caution. Curcumin at high oral doses has mild anticoagulant and oestrogen-modulating effects in vitro. Topical use at cosmetic concentrations is minimally risky, but pregnant women prone to melasma should pick niacinamide or azelaic acid. Realistic expectations. Mild-to-moderate anti-inflammatory and antioxidant effect. Does not replace retinoids, niacinamide and vitamin C but can be a soft add-on in masks for problem and dull skin.

Frequently asked questions