Sounds like you might have needed more food or the dose was too high. Then again, you might just be flatter than normal and may bounce back later when your glycogen can refill. I stay pretty conservative with t3 and only lost muscle, years ago, when i took the dose too high, too fast, while not eating enough food. I would tapper off of the t3 at the end. I've only seen problems a couple of times with acquaintances that have had long term thyroid issues after using it. One gal, didn't taper down. Then other was predisposed to thyroid issues. I would slowly reduce the dose over a 2-3 wk period, by 12.5mcg every 3-4 days. I find that there is a point of fogginess that lasts for a few days, once I cut it completely, so near the end, I will stay on 25mcg for closer to a wk. Then 12.5mcg for a wk. Then I'll cut it out. I would be very carefui cutting calories, if you are cutting the test out too. Usually, I would use t3 right up to the end of a diet, at which point, I would have a client tapper off and start a reverse diet, out of the cutting plan.