I went through Chemo and radiation and lost over half of my hair, (I am a female). I started using the Nioxin products a year ago, and it has made a whole world of difference. My hair has come back thicker than it was before the cancer. I would recommend all the Nioxin products. I was buying them on Amazon, but Groupon is much better priced. So please Groupon keep it on your list of products that work on your list.