My Hair on My Comb and in the Sink Seems to Be Miniaturized

I believe you have mentioned before that, at any given time, roughly 10% of the hairs on your head are in the miniaturized/resting state. For some time now, however, I’ve noticed that many, if not most, of the hairs gathering on my comb and around my sink appear to be miniaturized to some degree. Is this normal, or should I really start to be concerned? I’m currently 19 with no noticeable signs of balding.

Thinner hair shafts represent about 20% or less than the rest of the hair in most people. These hairs may reflect vellus hairs, not miniaturized hair. What you see on the comb and in the shower drain is probably miniaturized hairs reflecting the balding condition. You can find out for sure by getting a set of bulk measurements comparing the donor hair with hair elsewhere on your head. Why guess?