Enjoyed using this. Like many other shampoos aiming to combat thinning hair, this shampoo has essential oils in it that cause a tingling sensation... clove, peppermint, etc. The logic is the same as a capsaicin muscle pain cream: the tingling causes increased blood flow to that area, and perhaps means more nourishment for the follicle root. I could see how this may delay the inevitable, but don’t go expecting miracles. In reality, if you’re balding from male pattern balding, nothing will save you aside from that pill that stops testosterone from converting to dht. In my opinion, the risk for permanent sexual side effects of the pill outweigh the hair it will save. So, products that prolong the time before the hair eventually falls out have their place on the market. This may be one of them. Temper expectations and you won’t leave unhappy.