just thought I'd shoot you some facts about T3, that came straight from Bill.
T3 half life 3 days.
full replacement dose is 25mcg/day, meaning your thyroid would shut down with this dose.
going past 50mcg is a waste.
12.5 mcg (half your tab) won't shut you down and you can reap the benefit of a full replacement dose with your natural thyroid still kicking.
meaning...if you take 50mcg..by day 3 you are looking at something like 120-150mcg in your system.
even with pharm grade T3 I dont notice too much muscle loss if staying below 25mcg, at the same time you're making sure your thyroid is up to speed and the test will prevent some muscle loss too.
IMO don't go over 25mcg.