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My 3 grandsons all are subject to baldness. Neither my son nor I have any problem with it and there is none in my family. However, the men in their mother's family are all troubled by it, so I guess we know the source
Of the three grandsons, all in early 30s..the youngest and eldest have no problem with it. The youngest just shaves his head and the eldest has just a silver dollars size spot on top toward the rear.
..But the middle one was truly bothered by it, and it was the top front, and had progressed back about as far as about the front edge of his ears.
I guess it is about a year now, since he started a regimen called "Keeps". He now has his original hairline back to where it was when he was 16.
He has been faithful in following the program, and they say he has to continue with it , or it will start to thin again.
All in all, he is pleased to have his hair back.. Hope this helps somebody..