CSR Herbs Avuri Ilai (Indigo Leaves) Powder is a 100% natural botanical formulation made from pure Indigofera tinctoria leaves. When applied following henna application or blended with herbal hair packs, it provides rich, natural dark hair tones without harsh chemicals. Key Features: - 100% Pure Indigofera tinctoria leaves - Siddha Sastriya Medicine (Siddha Formulary of India Part 2) - GMP Certified - For External Use Only Directions for Use: Take 25g to 50g of powder, mix with warm water until a thick paste is formed, allow to sit for 15 minutes, apply evenly to hair/scalp for 1-1.5 hours, and rinse off thoroughly with plain water.