good article here
https://thinksteroids.com/steroid-profiles/cytomel/
and a bill roberts quote from another forum
A mere 12.5 mcg/day, which is at most only half-replacement. I intitially recommended cycling off, to be completely certain not to harm anyone with my advice, but as for myself, was pretty sure it could be used indefinitely. I used it for 6 months or so straight (did not make a record of the dates though so the number is not precise) with zero problems. Not one person has had the slightest problem. Yet the benefits are obviously noticeable. I'd say it is worth, all else staying the same, 0.5 lb of fat per week if not really dieting, and more than that if thyroid is otherwise depressed from dieting.
Actually it may be better than this, because when not really dieting, I ate considerably more calories, I would think 500 per day extra or more, yet slowly lost fat, so that would work out to more like 1 lb per week. But in early weeks of dieting, where fat loss would be good anyway and thyroid was not yet depressed, it was not worth 1 extra lb -- in other words, it didn't push a 2 lb per week diet to 3 lb per week, but only 2.5. I don't know the reason for the apparent discrepancy.
