How Common is Hair Loss Following Gastric Bypass?

Hello Doctors,

I just read an article from a writer for the local paper about her 100 pound weight loss following gastric bypass, which is something I’ve considered doing for myself. One thing that stuck out to me was that she says, “One common post-surgery side effect is hair loss. And I have been losing my hair. I knew about this before surgery, so I am dealing with it. I don’t like it, but it will grow back, and I have also lost most of my eyebrows, but that too will grow back.” See article here.

So my question is, how common is this loss? Scalp hair loss is a problem in itself, but to lose my eyebrows too would be devastating. How long could something like this take to regrow (or will it not regrow)? My husband visits this site quite frequently and when I mentioned the story, he suggested I write to you. Thanks for your help.

A gastric bypass surgery causes weight loss and in many cases can produce signs of malnutrition. Weight loss is often associated with hair loss, particularly in men who have genetic hair loss. For women who do not have genetic hair loss, the hair loss may reverse as nutrition gets better and the weight stabilizes, but for men with genetic hair loss, it often accelerates the genetic process. For men in this situation, it’s best to take finasteride prior to having the gastric bypass, and maintaining this drug for life. Even with the DHT block offered by the drug finasteride, hair loss may still occur.

The good news is that hair transplantation can be used to replace the lost hair in the same way as in a person with hair loss that didn’t have the gastric bypass. As far as eyebrow loss, it would be unusual, but again, hair transplants into the eyebrow easily can solve that problem as well.