For instance, we know that, if you're zinc deficient, adding zinc to your diet can significantly increase serum testosterone levels. (tctmed.com)
This powerful test - boosting compound is shown in a human clinical study to significantly increase total serum testosterone levels as documented after 90 days. (truegritness.com)
It is likely that despite having a slightly elevated total serum testosterone level, you still have a normal free testosterone. (tctmed.com)