Lithospermum Erythrorhizon Root Extract

Lithospermum erythrorhizon (shikonin-containing) root extract is used for anti-inflammatory/soothing and colorant properties, typically at low concentrations, but its naphthoquinone pigments have documented potential for irritant and allergic contact dermatitis in sensitized or eczema-prone individuals. While many users tolerate it, compromised skin barriers can react unpredictably, and leave-on products increase exposure time. Given the real-world sensitization risk despite “calming” marketing, I rate it as mild with occasional sensitivity possible. Safety Notes: In commercial skincare, Lithospermum erythrorhizon (gromwell/shikonin) root extract is often used at very low levels (around 0.001–0.05%) as a color-active/soothing botanical in leave-on creams, serums, and barrier-repair products, and occasionally in rinse-off cleansers where deposition is limited. Higher-strength consumer-available products marketed for redness/repair or as shikonin-rich balms/ointments commonly place the extract around ~0.5–2%, with the upper end (~3–5%) seen in niche, deeply colored, oil-based or balm formats where solubility/staining potential and sensory limits are managed. No specific global maximum is set for the extract under typical cosmetic regulations, so the observed ceiling is driven mainly by stability, color intensity, odor, and irritation risk rather than a hard regulatory cap.