Dear Dr,
Great website. I had a question. You have stated in the past that the balding process tends to end at the age of 30. Can you elaborate on this? It has been my experience that most men lose more hair in their 40’s, 50’s and 60’s.

The very bald person loses most of his hair in his 20s, although this is just a general rule. There are different patterns of balding and these patterns often slow their progression as a person ages. But of course, the older you are, the more balding you will see in the overall male population. That means that the 20 year old with early signs of advanced balding may be that Class 7 pattern man by their late 20s. Some of the patterns of balding do start later in life, but these men rarely get very advanced hair loss patterns. The key to good control of the balding process is early detection, early diagnosis, and early treatment. The earlier the treatment for genetic male pattern balding, the better the medication works (like Propecia).
I often see men in their 30s start thinning and then progressing slowly to a balding pattern like the 3V pattern shown below. Over time, the crown balding in these men may expand to a larger area as they get into their 40s and 50s. Propecia works very well at slowing, stopping and possibly reversing the hair loss in those men who have this 3V pattern appear in their 30s or 40s.
For your reference, here is the Norwood Chart that shows the different patterns of male genetic hair loss. One rarely sees the Class 7 pattern start appearing in men past 30 years pf age.