2 doctors weighed in:

Why did so many of my classmates get prematurely gray? I had no idea until I saw them on facebook, and they are barely 60.

2 doctors weighed in
Dr. Richard Bensinger
Ophthalmology
1 doctor agrees

In brief: Bell shaped curve

The development of grey hair follows a statistical curve with a new in their 30's gettting grey, more in the 40's and so on.
By the seventies most have turned grey with a few rare exceptions. Greyness is common in the 60's and your friends are probably not prematurely grey.

In brief: Bell shaped curve

The development of grey hair follows a statistical curve with a new in their 30's gettting grey, more in the 40's and so on.
By the seventies most have turned grey with a few rare exceptions. Greyness is common in the 60's and your friends are probably not prematurely grey.
Dr. Richard Bensinger
Dr. Richard Bensinger
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