Not strong enough
I tried these Thompsons 150mg tablets for hair loss for 6 months and nothing happened. My naturopath recommended I up my dose to a 10x stronger tablet (1500mg a day) only THEN I saw results. Within a few weeks I had baby hairs growing back, and all the thin patches growing back. After several years my hair is much thicker and nearly waist length. Whenever I switched back to the Thompsons weaker tablets I noticed my hair falling out again. They need to provide a more effective dose - its too expensive/difficult to swallow 10 tablets a day when other brands do the better tablets for the same price. Biotin is water soluble so it is very safe at higher doses and doesn't build up in the body like Iron does.