Nearly all men's hairlines will mature with age and slight recession, classified as Grade 2 on the Norwood Scale, is normal. But hair loss in men affects about 80% of the population to varying degrees and most specialists agree that if you enter Grade 3 on the Norwood Scale it's time to think about whether you'd be concerned about losing more hair or not. If you are, it's a good idea to consult a hair loss professional.
Most specialists would recommend that Grade 3 is the stage where a man should consider whether or not further hairline recession or hair loss is going to be a problem for them in the future. If it is, he should consult a specialist to get the treatment that will be right for his individual case.
A receding hairline is often one of the first signs of male pattern baldness. A combination of treatments can help control the genetic condition, such as Propecia to stop the progression of recession or thinning, and Minoxidil, a particularly effective hair growth stimulant for hairline and temple areas. While hair loss at the temple area can be the most difficult section of scalp hair to regrow, Minoxidil 12.5% + AA is an ideal treatment for a receding hairline.
If you're not at the stage where hair loss is a concern but are not fond of the "mature" hairline, Minoxidil 12.5% + AA could help you maintain a youthful hairline. But generally most men are comfortable with what is classified as Grade 2 hairline recession.
Even if your hairline progresses to a Grade 3 on the Norwood Scale, it's difficult to predict how much hair you're likely to lose or how quickly, without having a professional diagnosis. Generally speaking, the younger you are when you start to recede, the more hair loss you are likely to encounter. There's nothing wrong with aging gracefully, but if you're worried about hair loss, there is something you can do and now is the time to act.