When is it time to start worrying about hair loss? Or, in other words, how much hair is it “normal” to lose a day? The answer comes from a recent American study: just ten, but up to fifty “fallouts” a day can be tolerated. As a matter of fact, at the end of its life cycle, hair falls out naturally. Researchers also suggest the scientific method for the assessment, the “60 second count”: you comb your hair for a minute, then count the hairs left on the comb.