My stepgrandfather, when my grandmother first met him in the early 1970s, had a relatively good head of hair, though he was clearly balding:





He was in his mid 50s here. The photos are between 1972 and 1974, he was between 55 and 57 in them.
By 1987, at the age of 70, he had clearly lost much of his hair:


By 1991, age 74, the bit that was left on the crown was giving way:

And by the time he died in 1998, he was fully bald.
I thought the common idea was that if a man is to go bald, he will lose most of his hair in his 20s and 30s. Why, in some cases, can the "bald gene" suddenly switch on in a man's 50s?





He was in his mid 50s here. The photos are between 1972 and 1974, he was between 55 and 57 in them.
By 1987, at the age of 70, he had clearly lost much of his hair:


By 1991, age 74, the bit that was left on the crown was giving way:

And by the time he died in 1998, he was fully bald.
I thought the common idea was that if a man is to go bald, he will lose most of his hair in his 20s and 30s. Why, in some cases, can the "bald gene" suddenly switch on in a man's 50s?
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