What it is
Indigofera Tinctoria Leaf/Stem Extract is derived from the leaves and stems of Indigofera tinctoria L. (Leguminosae/Fabaceae), a tropical shrub native to South Asia and Africa. The extract contains indican, a glycoside that converts enzymatically to indigotin (indigo blue), as well as active compounds tryptanthrin and indirubin. Tryptanthrin exhibits antimicrobial and anti-inflammatory properties; indirubin supports skin cell maturation and may help manage conditions like psoriasis. Bioflavonoids in the extract address chronic redness pathways, while antioxidants help neutralize free radicals from pollution and environmental stressors. It is also known to stimulate filaggrin production, reinforcing the skin's barrier. Used at 2–5% in formulations. The aqueous extract contains no essential oils and therefore no declarable fragrance allergens.
Safety & warnings
Generally considered safe for cosmetic use. Rare cases of contact dermatitis or allergic reactions have been reported, particularly in sensitive individuals; patch testing is recommended before facial use. The rotenoid compounds present in the plant (deguelin, rotenone, tephrosin) have insecticidal activity in their crude form, but at typical cosmetic concentrations in purified extract these are not a documented concern. The aqueous extract is free of essential oils and declarable fragrance allergens. No CIR safety assessment specific to this ingredient was identified.
Origin & sourcing
Extracted from the leaves and stems of Indigofera tinctoria L., a leguminous shrub cultivated across tropical South and Southeast Asia, West Africa, and East Africa. Leaves are harvested and processed via aqueous extraction; oil-based and glycerin-based variants also exist. The active pigment marker is indigotin, derived enzymatically from the leaf glycoside indican. Commercial extracts are available in water/glycol, oil (jojoba, squalane, sunflower), glycerin, or maltodextrin powder forms, with organic-certified variants available (COSMOS, NATRUE, EU Organic).
History
Indigofera tinctoria has been cultivated for over 5,000 years across India, East Asia, and Egypt as the primary source of natural indigo dye. Marco Polo (13th century) documented indigo preparation in India. Its leaves and stems have long featured in Ayurvedic medicine for skin and hair applications. Synthetic indigo largely displaced the natural dye by the late 19th century. Modern cosmetic use emerged as formulators sought natural blue colorants and botanical soothing agents, with brands such as Tatcha building product lines around the ingredient. The CAS number 84775-63-3 (leaf extract) is registered with EU CosIng (COSING REF 56711).
Questions everyone asks
What does Indigofera Tinctoria Leaf/Stem Extract do in skincare?
It functions primarily as a skin conditioner and soothing agent. Active compounds including tryptanthrin and indirubin help reduce inflammation and calm reactive or sensitive skin. It also provides antioxidant protection and may support the skin's barrier by stimulating filaggrin production.
Can this extract color skin or products blue?
Yes, the extract contains indigotin (indigo blue), derived from the plant's indican glycoside. It can impart a natural blue tint to formulations. In hair care, combining it with henna produces a natural black tint. In skincare, the concentration used is typically too low to visibly color skin.
Is Indigofera Tinctoria Leaf/Stem Extract safe for sensitive skin?
It is generally regarded as safe and is specifically used in formulations targeting sensitive, reactive, or compromised skin. However, rare allergic reactions or contact dermatitis can occur. Patch testing before first use is advisable, especially for individuals with known plant allergies.
How is this extract related to traditional indigo dye?
Indigofera tinctoria is the same plant historically cultivated for natural indigo dye for over 5,000 years. Cosmetic extracts leverage the same active phytochemicals (indigotin, tryptanthrin, indirubin) found in the leaves and stems, but in purified, standardized form for skin and hair applications.