It is best and most effective to treat hair thinning early and aggressively.
There are currently 3 (proven) ways to treat hair thinning:
1. Oral medication such as propecia. However, there are side effects such as impotence and decreased libido.
2. Topical application such as Minoxidil.
3. Low Level Laser Threapy or LLLT, is also effective for hair loss. You can use the iGrow laser or LED light.
The above 3 ways are non-invasive methods to stimulate hair growth.