I love how this shampoo smells, it reminds me of the Girl Guide mint chocolate cookies, and the smell hits you as soon as it comes out the bottle, love it. This product says that it increases scalp circulation and helps alleviate dry, flaking scalp. Now the first time I used it I expected it to tingle right away, which is what is expected of products with peppermint, which didn't happen. So the second time I used this shampoo I let it sit in my hair for about 5 minutes and I felt the tingle. I definitely will let it sit in my hair from now on. When I washed out the shampoo, my hair and scalp especially felt very clean.