If you are young and have not seen any signs of hair loss, but your dad, your grandpa, or uncle (on either side of your family) has experienced hairline recession or balding, then you are still in great shape. However, there is definitely a chance hair loss will begin at some point in the future for you if you do nothing. With that in mind, you can also completely avoid it and maintain the amount of hair you have right now if you are proactive and plan wisely.
So if you are concerned with possible future hair loss, keep an eye out, and if you ever notice it starting to occur (your hairline recedes, or you start losing hair in your crown, or your hair feels or appears thinner), then you can begin a “program” to halt the process and maintain the hair you have.
To know what to do when you just begin to notice slight hair loss, see My Hairline Has Just Started to Recede.
Maintaining Hair For Men 