I rarely buy products like this, but now I've lost so much hair lately, and the little alopecia spot I had on the back of my head had gotten much bigger, so I was completely desperate and bought the whole series in hopes that it would help, and within a week there was more than half as little hair left on the hairbrush, and I was shedding significantly less hair when I washed it. I could hardly believe it, but now a month has passed, and I can feel small hairs coming back on the alopecia spot! It's absolutely amazing! I highly recommend it!