After applying shampoo, work into a lather with a gentle massage on the scalp, ensuring coverage of the hair as well. Leave on the scalp for one to three minutes before rinsing. Repeat the first step, increasing the leave on time to between two to four minutes before rinsing. The more often you shampoo, the better the results. Men: 4 – 6 times a week, for women, 2 – 4 times a week is suggested as a minimum. For women that wash their hair once or twice a week, maximize the time you leave the product on to obtain maximum results.