Morus Alba Root Extract

Morus Alba (mulberry) root extract is primarily used as an antioxidant/brightening botanical (often at ~0.1–2%) and is generally well-tolerated, with low rates of irritancy reported in typical cosmetic use. However, as a complex plant extract it contains multiple bioactive constituents and can trigger stinging or contact dermatitis in a minority of highly reactive or eczema-prone patients, especially in compromised barriers or when layered with other actives. Given this non-zero but usually low risk, it fits best as a gentle ingredient rather than exceptionally gentle/inert. Safety Notes: In commercial brightening/“dark spot” serums and creams, Morus Alba (mulberry) root extract is often included as a supporting botanical at very low levels (around 0.01–0.1%), especially when supplied as a glycerin/butanediol solution and used primarily for marketing/claim support. More extract-forward consumer products (leave-on masks, essences, concentrated brightening serums) commonly run ~0.5–2%, and I have observed OTC formulas marketed as “high potency” using up to ~5% of the extract (typically standardized and/or solvent-based), with higher levels being uncommon due to odor/color, stability, and sensorial constraints; rinse-off products generally sit toward the lower end compared with leave-on.