I've used over the counter and medicated shampoos and they are very harsh on my scalp and the dandruff remains. I wasn't very optimistic about this shampoo but I've used it twice and it works quite well. I recommend to leave it in 5 to 10 minutes to let it penetrate your scalp. The dandruff is almost gone, hardly any flakes. It has a great smell and my hair feels soft not harsh like with other shampoos. I would recommend this product.