Kérastase Première Serum Filler Fondamental Hair Serum

A professional leave-in hair serum specially formulated for damaged, over-processed, and color-treated hair. It helps repair and strengthen the hair fiber while addressing the effects of excess calcium buildup that can weaken hair and increase breakage. Enriched with Citric Acid and Glycine, it reinforces the hair structure, replenishes damaged fibers, and restores strength, flexibility, and smoothness.

Its lightweight formula provides heat protection up to 230°C (446°F), helps reduce frizz and split ends, and protects against humidity and environmental stress, leaving the hair smoother, shinier, and easier to style without weighing it down.