Good article, the studies linked to it describe people who are hyper, and it makes sense being hyperthyroidism could cause muscle breakdown. I don't think in the study it was reported what level of FT3 cause the muscle break downWhile the link below describes in great detail why high thyroid hormone levels may make building muscle more difficult, there are lots of other reasons why you would not want low levels (low energy, etc) and there are other ways to counteract this issue such as eating more, so lowering thyroid for this one reason doesn't seem like a great idea unless you can do so with no other adverse affects.
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Thyroid Hormone Effects on Energy Metabolism and Protein Turnover at a Glance
Thyroid hormones are hormones that are secreted by the thyroid. The thyroid is an endocrine gland in the front of your neck that’s located directly belowthinksteroids.com
Optimal for what?Optimal FT3 should be anywhere around 3.7 to 4.2 or so.
I wanted to see what everyone experience was in regards to building muscle and optimizing thyroid, perhaps hearing some anecdotes from ectomorphs like me.I can assure you that having sub optimal levels will most surely interfere with muscle building. You’re probably seeing posts about how t3 is catabolic etc. Those guys take huge amounts to burn fat. Being within normal range will have zero negative impact on muscle building and only positive.
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