This is the only shampoo
"This is the only shampoo that has never let me down. I always keep a few extra bottles on my shelf because I feel better knowing I won't run out. It's the first product I recommend to anyone dealing with scalp issues like dryness, excess oil, itchiness, dandruff, or an irritated scalp, and everyone I've recommended it to has been happy with the results. As a Korean who washes my hair every day, I've never had any problems using this shampoo. In my experience, you can notice a difference within three days—as long as you wash your hair thoroughly each evening for three consecutive days and dry it completely before going to bed. There are plenty of shampoos under $5 at the drugstore, but this one is absolutely worth spending a little more on."