Kromboost™ is a bioactive, upcycled barley protein rich in peptides, polyphenols and serine. It strengthens hair, boosts hydration and shields dyed color from heat damage. Ex vivo studies show up to 152% less breakage and 199% better color retention in leave-on, plus 166% in just one 3-minute rinse-off wash.
https://www.weareprovital.com/en/careactives/kromboost
