If you want the details they are covered on page 593 for T3 and 595 for T4. I steer clear because I dislike anxiety and tremors and try to avoid anything that tends to produce those effects. They also interact with other compounds, which feels risky when interactions are not well documented. A lot of bodybuilders use them to raise metabolic rate and drop fat faster.
Anyone familiar with these thyroid levels and ever tried T3 or T4 like levothyroxine? Mine sits at 3.3, which is not technically high but not low either. The upper limit is around 4.2. I know places to get the compounds but have never experimented with thyroid stuff before. Curious what others think.