A new derm asessed my 3.5 yr hair loss/thinning. Pull test was negative, yet I can rake fingers thru hair and pull 100 hairs in under 10 mins any time, any day. He says try 3 day wash test, and wash 1st day, skip for 3 days, and comb 1 minute a day, collecting only hairs from these combs. Does this reliably rule AGA out? My regrowth is at least 40% too fine density. He suggests Rogaine, no oral meds yet. I think TSH of 4.7 causes dry, fine, tangly growth. Endo and derm disagree.