Peptide reconstruction with different molecular weights has been developed for chemically treated and severely damaged hair. Thanks to biomimetic technology, based on the ability to imitate the natural structure of keratin, peptides are recognised as a natural element, integrating perfectly and restoring damaged areas in the keratin chain. The stable peptide bonds within the hair structure only become stronger over time and with washing, restoring the hair from the inside and outside, leaving it smooth and silky. Stimulation of collagen activity increases hair elasticity and diameter. Peptides work in synergy with vitamins, providing a strengthening, restorative, and smoothing effect. Hair looks thicker and shinier.