60. You May Also Experience Hair Loss
Along with gray hair comes the dreaded thinning of the crown on top of your head. Male-pattern baldness can start setting in during the twenties, but with women, thinning is more common to begin in the forties. About forty percent of women will notice that their hair is getting thinner before reaching their fiftieth birthday. The biggest reason is that while you will continue to lose hair at the normal rate of about 50 to 100 strands per day, it will not regrow as quickly as before.