Biotin as a hair loss solution is nothing new. I remember seeing biotin products and supplements in Europe when I lived there thirty years ago. It has been used for hair loss for a long time.
I started getting a bald spot last year and took to biotin supplements immediately. I'm taking the liquid version which gets absorbed into the body much more quickly than the capsule supplements.
My hair loss slowed down in about a month and it pretty much halted after that. I plan on taking biotin indefinitely to maintain my hair unless I get side effects from it.