towards the middle there are averages for normal healthy males
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3142021/#s5
[h=3]Estradiol concentrations measured by LC-MS/MS in lean, healthy men[/b][FONT="]The median total and free estradiol concentrations in healthy men were 1.45 [0.70–2.35] and 0.037 [0.022–0.072] ng/dL, respectively. The mean total and free estradiol concentrations in healthy men were 1.68 ± 1.11 and 0.050 ± 0.031 ng/dL, respectively. These concentrations were not significantly different than those in type 2 diabetic men with normal or subnormal free testosterone concentrations, with or without adjustment for age. One subject had undetectable estradiol concentrations. Using the reference ranges mentioned in research design and methods, one subject had supranormal total estradiol, whereas eight men had supranormal free estradiol concentrations.[/FONT]
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3142021/#s5
[h=3]Estradiol concentrations measured by LC-MS/MS in lean, healthy men[/b][FONT="]The median total and free estradiol concentrations in healthy men were 1.45 [0.70–2.35] and 0.037 [0.022–0.072] ng/dL, respectively. The mean total and free estradiol concentrations in healthy men were 1.68 ± 1.11 and 0.050 ± 0.031 ng/dL, respectively. These concentrations were not significantly different than those in type 2 diabetic men with normal or subnormal free testosterone concentrations, with or without adjustment for age. One subject had undetectable estradiol concentrations. Using the reference ranges mentioned in research design and methods, one subject had supranormal total estradiol, whereas eight men had supranormal free estradiol concentrations.[/FONT]
