[justalittlemore]

Addressing the underlying cause is critical. Many people don't know, for example, that blood pressure medications [among others] can cause hair loss. If it's temporary, your friend can try supplementing with silica, biotin, and MSM. Silica is essential for collagen formation, which is part of hair, skin, nails, and bones. The biotin is effective by itself in promoting cellular growth, but its effects are multiplied by adding MSM. MSM is important because it promotes the formation of keratin, which helps build healthy hair. If you don't want to get several different vitamins/minerals, Hair Factors by Twinlab is a good off-the-shelf supplement that will help grow strong, healthy hair. I've used it in the past.