But his free testosterone, Morgentaler told him, was another matter.

The patient's free testosterone was a little under the lower limit of normal.

The tests for free testosterone seem to be even less accurate.

Also dihydrotestosterone and the ratio of free testosterone to estradiol increased significantly.

So, you need to check the free testosterone which is the active.

However, free testosterone is difficult and expensive to measure, and many laboratories do not offer this service.

Previously, age-related decreases in free testosterone were once accepted as normal.

Certain extracts of stinging nettle are therefore used by some bodybuilders in an effort to increase free testosterone.

After intense aerobic effort, high endurance athletes were also found to have lower free testosterone the next day.

The active portion, called "free testosterone," can give a more accurate picture of how much testosterone is available to the body.