For someone who is genetically determined to lose hair how long does it take to lose any noticeable amount of hair? 6 months? a year? 10 years?...

No way to know.: Even though you have a genetic predisposition, how it will affect you depends on lots of things! Diet, overall health, etc. Somethings, like diets high in meats with hormones in them can lead to premature aging, in earlier hair loss. Other conditions, like thyroid problems, can cause hair loss. Eat less of any protein than the usual American, eat hormone free meat, when you do. Get wellness exams