For those who consume a normal diet, the factors influencing hair cycling, hair growth and specifically, hair loss are well outside the scope of nutrient-driven biology.  Even homeless people experience hair loss in approximately the same ratio as the rest of the population.  Pointedly, residents of homeless shelters exhibit ailments, poor hygiene, drug addiction and other maladies.  And so, we find that the prevalence of pattern hair loss in such people closely coincides with the non-homeless population.

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