I never really lost a lot of hair becausebi took 1000mg of biotin a day and used nioxin shampoo and conditioner for thinning haor. Stage 4 for normal hair or stage 8 for color treated. Its expensive but it lasts a long time. It lasted me about 6 months before i had to buy more. And it worked. I had cancer previously and lost a lot of hair and used it then. So when i had the rny, i started it immediately.