Dr. Sante Hair Serum with keratin for dull and brittle hair preparation for damaged tips. Keratin is the main "building block" of hair, penetrating into damaged areas, renews the hair structure, restores elasticity and shine.For dull and brittle hair. Especially recommended for dry, split, dull hair.Keratin is the main "building block" of hair, penetrating into damaged areas, renews the hair structure, restores elasticity and shine.The serum protects the ends of the hair from drying out and prevents breakage and split ends, provides softness. Hair becomes smooth, shiny and tidy. Recommended for use after every hair wash.