For as long as men have been fretting over their expanding foreheads, they've been scrounging for hair loss treatments. From hippo fat pomades to the urine of young foals, history is full of just-so-crazy-they-might-work concoctions. They didn’t work. And a quick Googling reveals that most of the products and services marketed today are only slightly less absurd.
What’s got less evidence supporting its efficacy are the hair-growth shampoos that claim to block DHT (like those sold by Hims in their Rx Hair Kit). Rieder is skeptical that you’re going to see any tangible benefits by rubbing DHT blockers into your scalp. “I find it very difficult to believe that something that’s applied to the scalp and rinsed off is going to have any appreciable effect.” All four doctors also shut down any suggestions that hair-growth supplements or vitamins, like biotin, could help promote hair growth or stop hair loss — though a couple hypothesized that vitamins or supplements could lead to hair regrowth if your hair loss was a result of a nutritional deficiency. But otherwise, if you’re dealing with regular old male-pattern baldness, “There is no such thing as a ‘hair vitamin,’” says McMichael.
It can cause unwanted hair growth. Some women may experience facial hair growth when they use minoxidil. That can happen if the medication trickles down onto your face or simply as a side effect when you apply it only to your scalp. The risk is lower for women who use the 2 percent concentration of the drug, as opposed to the 5 percent concentration that’s designed for men.
While trauma can come on suddenly and unexpectedly, you may be able to help manage ongoing stress in your life with exercise, like yoga, or mindfulness techniques, like meditation. Some researchers are even exploring these alternative healing modalities in relation to reversing hair loss. The idea is that yoga and meditation may help regulate blood sugar and enhance circulation, promoting regrowth.
In either sex, hair loss from androgenetic alopecia occurs because of a genetically determined shortening of anagen, a hair's growing phase, and a lengthening of the time between the shedding of a hair and the start of a new anagen phase. (See "Life cycle of a hair.") That means it takes longer for hair to start growing back after it is shed in the course of the normal growth cycle. The hair follicle itself also changes, shrinking and producing a shorter, thinner hair shaft — a process called "follicular miniaturization." As a result, thicker, pigmented, longer-lived "terminal" hairs are replaced by shorter, thinner, non-pigmented hairs called "vellus."