What is a Normal Blood Level of Testosterone? What Do Guidelines Say?

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Nelson Vergel

Founder, ExcelMale.com
Thread starter #1
Normal values may vary from lab to lab depending on what reference range they use. Depending on the country, ranges are in nanograms per deciliter (usually in the United States) or nanomoles per liter (Europe and other countries). The conversion factor is:

Click here: What’s a “Normal” Testosterone Level and How to Measure Your T

Hormone Ranges

Many doctors treat men who have under 350 ng/dL of total testosterone and who present with most of the symptoms listed by the ADAM questionnaire.

How do you know you need a testosterone blood test?

Testosterone Level: How Low is Too Low? Health Consequences of Low Testosterone

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Nelson Vergel

Founder, ExcelMale.com
Thread starter #2
Testosterone Fractions in the Blood

1- Total testosterone (total amount produced by the body. For a healthy male this production ranges from 5-7 mg per day)

2- Free testosterone (testosterone fraction not bound to any proteins. This is the active fraction)

3- Albumin-bound testosterone (this is testosterone's "savings account". They body draws from it when it needs more testosterone to become free testosterone)

4- Sex hormone binding globulin bound testosterone. This bound testosterone cannot be released into the blood stream. It is the body's "breaks" for avoiding excessive testosterone. Inflammation, aging, medications, and other factors can increase sex hormone binding globulin.

When we add free testosterone plus albumin bound testosterone we come up with bioavailable testosterone (the testosterone available to the body).

These are metabolites of bioavailable testosterone:


Nelson Vergel

Founder, ExcelMale.com
Thread starter #8
Comparison of testosterone blood test levels that guidelines use to recommend starting TRT (TTh) for testosterone deficiency.

Guidelines from the Canadian Medical Association Journal, American Urological Association, European Association of Urology, Endocrine Society, International Society for Sexual Medicine, and British Society for Sexual Medicine were included for review. Recommendations were generally consistent across guidelines. Key differences include the biochemical cutoff for low T, and recommendations for patients with low to normal T, prostate cancer, or cardiovascular disease.

Testosterone Deficiency Comparison Between Guidelines.jpg


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