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Body fat raises the conversion of testosterone to estrogen. Also you need to make sure you test for sensitive estradiol and not estradiol only. The latter is a test for women and is useless for gauging the estradiol level of men.I’m curious about the 5% estradiol number you stated. I’ve had my testosterone tested twice in my life, but only once did they test for estradiol. My estradiol was 15% of my total test and at the time I was about 240lbs at 6ft, sedentary and recovering from inguinal hernia surgery. I’m just curious what the relationship between total t and estradiol is; I’m assuming my excess body fat at the time may have had something to do with it. I was tested two years earlier while being 50lbs lighter and my total and free were both quite a bit higher, unfortunately I did not get tested for estradiol. Also if it matters, both times my sbhg were 10 and 13. I appreciate this thread, it is a great source of information.
There is no scientific evidence for the 5% relationship between total testosterone and estrogen. It’s just simply a gauge that I found to be reasonable for myself. Some people feel better with higher estrogen, and some people feel better with lower. Everyone’s different really. However there is evidence that having lower estrogen does have Cardiovascular, cognitive, and bone related risks.