First treatment for hair straightening that does not damage the hair, protecting it and repairing it intensely. It does not damage the hair and is compatible with all hair treatments. It contains, besides many other active ingredients, a combination of natural amino acids that acts by temporarily weakening the cysteine bonds of the hair fiber allowing to straighten it, stem cells plant culture extract and caviar extract with anti-oxidant and anti-aging effect, Hyaluronic acid that restores the natural hydration of the hair and its flexibility, active complex silanetriol plus Panthenol that offer internal protection of the fiber during the straightening process, extract of the fruit of the Tamarind Indica that improves the resistance of the hair to the temperature and complex of Propolis that prevents frizz, improves styling and provides softness and shine.