What is a Normal Blood Level of Testosterone?

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Nelson Vergel

Founder, ExcelMale.com
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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?


 
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Nelson Vergel

Founder, ExcelMale.com
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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:

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