What it is
Lithospermum Erythrorhizon Root Extract is derived from the root of gromwell and contains naphthoquinone pigments such as shikonin, which give it a distinctive purple-red hue. In cosmetics it is used for soothing and conditioning effects and can naturally tint a formula. It has no UV-filtering function.
Safety & warnings
Generally well tolerated at cosmetic use levels. Its natural pigments can impart color to a product and, at high loads, potentially to the skin temporarily. Sensitization is possible in predisposed individuals, as with any botanical extract.
Origin & sourcing
Natural; obtained from the dried roots of Lithospermum erythrorhizon, a plant used historically in East Asian traditional preparations.
History
Gromwell root has a long history of use in East Asian traditional practices, where its red shikonin pigment was used as a dye and topical preparation; this heritage informs its presence in modern Asian skincare.
Questions everyone asks
Why is gromwell root extract purple-red?
It contains shikonin and related naphthoquinone pigments, which give the root and its extract a characteristic purple-red color.
Is it a sunscreen active?
No. It is a botanical skin-conditioning extract and does not filter UV light.