Here's a small description I found
SanoTint hair color uses Golden Millet and natural plant extracts to
safely color your hair without damaging it. SanoTint hair color is a
safe, do-it-yourself hair treatment due to the natural ingredients of
its formula, which are: extracts of Golden Millet, Olive, Birch and
Grape Seed as well as Calcium Pantothenate (Vitamin B5) and Biotin.
It is important to note that there is no such thing as a purely
natural hair color, if you want permanent color you have to use
chemicals. Although SanoTint uses chemicals, they use the least amount
possible. SanoTint contains no ammonia, less than two percent peroxide
(instead of the 10-12 percent that other brands use) and less than 0.5
percent p-Phenylenediamine (PPD). The SanoTint Light product actually
eliminates PPD and is one of the most natural hair colors on the market.