From article I read that it can be helpful both in terms of DHT and inflammation. So yes it could be possible to test it for a few months. Also the price is relatively low. I may take a test at the end of January. Stress can be one of the reasons. I remember about 2 years ago I had at least 8 white hairs (on sides). At that time I was doing high frequency trading and it was constant stress. Live or die by every tick. After I learned to manage stress my white hair also disappeared. Supplements like zinc, biotin, multi vit etc may also help, but for me it was stress managment that helped.