Men may also experience some sexual and emotional side effects while taking it: In a study published in the June 2011 issue of The Journal of Sexual Medicine, Dr. Michael Irwig of George Washington University found as many as 92 percent of test subjects reporting problems in the bedroom. The study also reported that “the mean duration of finasteride use was 28 months and the mean duration of persistent sexual side effects was 40 months,” meaning that side effects lingered long after subjects stopped taking the pill.
Other medical conditions — most commonly telogen effluvium and seborrheic dermatitis — can also cause hair loss, but most people can trace their follicular woes back to androgenetic alopecia, so we focused our search there. We started with more than 200 products, including all-natural solutions and high-tech gadgets, while skipping treatments that focus only on volumizing or thickening hair. We also limited our scope to the scalp, and left out specialty products designed only for eyebrows or beards.
The other main hair-loss treatment that was recommended by all four dermatologists I interviewed is finasteride, often called by its brand name Propecia. This FDA-approved medication is only available with a prescription, but these days, it’s found as a generic and ordered online after a virtual consultation, through start-ups like Hims, Keeps, and Lemonaid.