Keratin serum for straightened hair. To save the results of the slide. Restores, nourishes, and strengthens. Without salts, the smoothing results are three times longer. The various straightening methods weaken the hair and cause permanent damage, moisture loss, elasticity, and shine. Natural Formula's "Keratin Intense" serum is designed for hair smoothing by all methods and for hair that undergoes heat styling with high frequency (pen or ceramic straightener). The serum takes care of all the needs of damaged hair: It builds and restores the hair structure and elasticity, giving renewed shine and softness. The serum maintains the smoothing results by: Keratin enriched with a double formula rebuilds the inside of the hair and creates an external protective coating that wraps and smoothes the hair along its entire length. It maintains smoothing results three times. It is enriched with panthenol, which strengthens the action of keratin and increases the hair's resistance to breakage, heat damage, and chemicals. Without salts - a formula without sodium chloride that extends the glider's life and cleans gently without causing dryness. Rich in moisturizing substances, vitamins, and gentle silicones - it protects the hair against environmental and climate damage, is smooth, and allows combing and styling without damage. After the treatment, it was smoother, firmer, and resistant to breaking, radiating shine, soft, and pleasant to the touch. Instructions for use: Apply a small amount to clean, damp, or dry hair. 145 ml