Whey protein isolate increases DHT, a byproduct of testosterone responsible for hair loss. An alternative, whey protein concentrate, does not increase DHT and is safe to consume for hair and muscle building in those who work out. It may also be used to aid in weight loss.
Help Hair Shake by Dr. Larry Shapiro. I use it myself after transplantation for several months and then I buy it 3 times a year for a boost to my hairs health.