Our Earth Jagua temporary tattoos are NOT black henna. Ours is from the Amazonian fruit of the same name. Indigenous peoples in the Amazon have used the juice of the Jagua fruit for years and years. The fruit of the Jagua is clear, and as it dries, it darkens. Our Earth Jagua is mixed with natural ingredients to keep it fresh and safe from bacteria while in transport. Black henna is, indeed, toxic. We do not sell black henna. We sell Earth Jagua. Thank you very much.