This high-quality, plant-based, key ingredient, extracted from soy beans at the Gaillac site in France, helps reinforce the natural structure of the hair. With its composition rich in amino acids, including methionine and cysteine, similar to those found in keratin, it repairs the hair.

Leaves of this shrub are cultivated in southwest France and reveal a wealth of mordant tannins that bind themselves with the hair’s keratin and the dye. The pigment can then bind to the hair’s protein structure to prolong color on hair.