Inquiries about hair supplements

I am 19 male, and have a good head of hair that is very important to me. My grandfathers on both sides of the family, especially one, started balding in their 20s. My hairline has started to mature, and while I haven’t noticed anything SUPER scary yet, its still a concern of mine. I brought this up with my stylist and she recommended that I should start supplementing early, just to be safe, if it was really a concern of mine. Is this recommended, and if so, what supplements should I be looking at?