Hair regains its volume, shine, and thickness. Combined with a complex of vitamins, Siegesbeckia has regenerating properties that improve intercellular exchanges within the hair bulb. Optimum Growth Serum promotes hair growth and resistance. Reactional and seasonal hair loss are reduced. HOW TO APPLY: On washed and well-dried hair using the pipette, apply the contents of the vial. Gently massage with fingertips. Do not rinse—style as needed. The course of duration: 1 month (2 times a week, then 1 time per week for 2-3 months. 2 boxes = 1 course of application. In case of seasonal hair loss, treat in spring and autumn. Precautions: in case of contact with eyes, rinse with plenty of water.