Obviously people come here for answers to their new Dx or help in tweaking the medications or dosing schedule they are on. What I would like to know is why, if the upper range is 1100, does almost everyone report numbers like 300-500. Some report 700 but usually on some SERM or 200mg Cyp/wk.
I would like to see more independent data on Total testosterone levels in various age groups than what is currently available. One table I found on a Men’s Hormonal Health website had my levels of 300 in the over 80 crowd. Now I’m sceptical that >700 is normal.
I agree. You will very seldom get a natural healthy guy on message boards posting levels above 750. It is almost unheard of. Those high upper ranges you mention are a red herring - they are supposedly derived from the 95th percentile of a population AFAICR, but don’t appear to be repeatable, so I would take them with a grain of salt. Other labs have upper ranges in the 800s, which seem to me more realistic.
One explanation could be that a particular lab’s testing equipment is less accurate in the upper part of the range, leading to inflated readings there.
The tables in the link dhickey posted show a mean T level for 20-somethings to be in the 600s, and SHBG somewhere in the mid-30s. Those numbers are much more modest compared to what a lot of guys try to achieve on TRT.
Thanks dhickey, that’s the one I was referring to. Sadly it also seems to be the only one. At 1996 it couldn’t even be used as a reliable source in a research paper. For some reason I thought the 20yo’s were higher than that. Makes me feel better knowing my trough is 440 on 50mg cyp/wk.
I had another one that was pretty similar, but I can’t seem to find the study.
Different labs seem to have different results and ranges, so it might be a little tricky comparing this to your labcorp results. Total T doesn’t seem to differ as much as free T , or Bio T.
I would just aim for the upper part or the normal Free T range. With labcorp, this would be 20-25 or so. I feel pretty good in that area if E2 is about the same. Trying some different things right now and probably in the low teens. Everything feels the same accept libido. I can still perform, but desire is very muted unless stimulated.
[quote]dhickey wrote:
I had another one that was pretty similar, but I can’t seem to find the study.
Different labs seem to have different results and ranges, so it might be a little tricky comparing this to your labcorp results. Total T doesn’t seem to differ as much as free T , or Bio T.
I would just aim for the upper part or the normal Free T range. With labcorp, this would be 20-25 or so. I feel pretty good in that area if E2 is about the same. Trying some different things right now and probably in the low teens. Everything feels the same accept libido. I can still perform, but desire is very muted unless stimulated. [/quote]
hope the files will be attached.
Clinical Endocrinology (2005) 62, 64-73
Normal, bound and nonbound testosterone levels in normally
ageing men: results from the Massachusetts Male Ageing
Study
Beth A. Mohr*, Andre T. Guayâ? , Amy B. Oâ??Donnell* and John B. McKinlay*
*
New England Research Institutes, Watertown, Massachusetts, USA and
â?Â
Center for Sexual Function/Endocrinology, Lahey
Clinic Northshore, Peabody, Massachusetts, USA
