I guess you found this blog by a Google search. I'm going to tell you something that worked for me, and I'm not going to ask you to buy anything.
I have essentially the same head of hair that I had 30 years ago, when I went to an upmarket hair stylist because my scalp was itchy and the hair was falling out at an alarming rate. I had a maternal grandfather who was bald, but apart from him I did not think I have baldness in my genes.
Anyway, here's what the hairdresser told me 30 years ago (and now I am telling you, for free)
• Stop using anti-dandruff shampoo or general purpose shower gel. For a few months use products that are intended for babies and infants, then switch to a good quality shampoo for normal hair. You must stop using anti-dandruff shampoo which is too harsh for your scalp and hair.
• Always use a good quality conditioner
• Wash hair only twice a week until the situation is stable
• Do not vigorously towel dry. Pat dry with a fresh towel, then let the hair dry naturally
• Do not use a heated hair drier - risk of too much heat irritating the scalp
• Do not use a comb. Instead learn to use a soft brush to achieve a neat look
All of this worked for me. I have followed the advice for 30 years
Please leave a short comment if you have found this advice interesting / useful / stupid
My business website is http://www.totalastronomy.com
You won't find any health advice there but there's plenty of stuff on our astronomy books and lectures
This blog is all about modern astronomy and physics. It is written by a professional astronomer. The blog will have my take on whatever is in the news right now. For 2012 I am starting a new series of history of astronomy blogs titled Remarkable Astronomers