What do the keratin, vitamin E, and linseed oil actually do in this formula? — TONING SEMI-PERMANENT EFFECT COLOR Bad Girl FULL MOON YELLOW 150ML

Direct dyes are gentler than oxidative colour, but pre-lightened hair is still fragile. Keratin is a protein that temporarily fills gaps in the cuticle, making the surface feel smoother and helping the pigment deposit more evenly — this reduces the patchy look that can happen on damaged ends. Vitamin E (tocopherol) acts as an antioxidant in the formula itself, stabilising the pigment blend and offering some protection against oxidative stress from environmental exposure after rinsing. Linseed oil is rich in omega-3 fatty acids; it coats the hair shaft, adding slip and gloss while reducing the dry, straw-like texture common after bleaching. Together these ingredients mean the hair usually feels softer and looks shinier immediately after rinsing compared to a plain pigment-only toner. They do not repair broken bonds or permanently change hair structure — think of them as a conditioning boost that supports the colour result.