I'm a little conflicted when I think about this shampoo. I bought several sets of Nioxin (shampoo, conditioner, & scalp treatment) for myself, my family, and my boo and I have got mixed results. When I personally used it I felt like my hair got oily faster than usual but my scalp itself was actually getting dryer and dryer at the same time. I did not really notice a difference in thickness and I did use it for more than a couple months consistently. I also was not really a fan of the minty smell. If you do use it, you will notice a little tingling but that did not bother me. My man on the other hand had better results than I did which is why I am giving 3 stars. After only a month you could see dramatic changes in thickness in his hair, he actually shaved his head before using it to see how effective it is and it worked for him! I think it is best to order the shampoo, conditioner, and scalp treatment all together. BUT, if you do want to save money and still try Nioxin, I suggest just buying the scalp treatment first.