I’m 27 with possible receding hairline, when do I start treatment?

I’m 27 with a mildly receding hairline. When do I start with preservation or treatment of what I have.

See a good doctor who can build a Personalized Master Plan and perform a HAIRCHECK test (https://baldingblog.com/haircheck-test-how-it-is-done-video/) to find out when and if you need to start treating your hair loss. A good doctor will work with the plan you derive and by following the plan you can keep your hair throughout your lifetime and never go bald. The key is to make a definitive diagnosis before you start any treatments and it’s all about peace of mind.