Fee Estriol vs. Free Estradiol test

[IronKnight]

In line with observations by Vince Carter that in low SHBG guys there tends to be more Free T and therefore more Free E2, and that maybe because of that we should be checking the free Estradiol more than the normal E2 (and that maybe because of that also, an E2 level around 20 might be better for us, due to higher free E2): I have a lot of free T (in the 30s) with Total T < 1k, so I am wondering what my free Estradiol looks like. However, I have a problem:

I don't have access to a free estradiol test
I do however have access to a free estriol test

Does anybody know if this will be close enough or useful to determine what my free estrogen looks like even though it won't be "free estradiol"? Does anybody know if the free estriol test is useful for men on TRT in general?

Background: My plan is to check this once I get E2 under control and the main figure is in range (i.e. in the 30s), slowly getting there.

 

[CoastWatcher]

In line with observations by Vince Carter that in low SHBG guys there tends to be more Free T and therefore more Free E2, and that maybe because of that we should be checking the free Estradiol more than the normal E2 (and that maybe because of that also, an E2 level around 20 might be better for us, due to higher free E2): I have a lot of free T (in the 30s) with Total T < 1k, so I am wondering what my free Estradiol looks like. However, I have a problem:

I don't have access to a free estradiol test
I do however have access to a free estriol test

Does anybody know if this will be close enough or useful to determine what my free estrogen looks like even though it won't be "free estradiol"? Does anybody know if the free estriol test is useful for men on TRT in general?

Background: My plan is to check this once I get E2 under control and the main figure is in range (i.e. in the 30s), slowly getting there.

It provides you and your doctor with no useful information. Estradiol and estriol are two different hormones. It is almost undetectible in when who aren't pregnant. As for men...well, it's a moot point.