Hi Vlad, Getting your testosterone optimized with estrogens and DHT controlled within good parameters is where I would start, but it sounds like you have other causes to investigate. Muscle spasms and cramps are the most common reported symptoms in people with low thyroid. Feeling cold is very common, but more important is to check your body temperature in the morning and see if it's 97.6 F or below (not sure You should have that tested including TSH, TOTAL T3 and TOTAL T4. Most people check only the "Free" T3 and T4, but just as with testosterone the free level isn't nearly as important. That's why most hormones aren't even tested in the "free" form, just testosterone and thyroid for some reason (probably because someone influential developed those tests). I would also suggest testing Cortisol, DHEA-sulfate, ACTH, 25-OH Vitamin D, Estrone, Estradiol, Total Estrogens, Prolactin, and maybe some others depending on your history of exposures (heavy metals, industrial chemicals, mold, etc.), dietary habits, and other symptoms you might have. I have to talk to people for an hour before I have a good idea what the causes might be. That would be a good place to start at least. I will attach my TRT information handout here so you can see what I think is optimal.