* [[Chrysin]], a flavonoid extracted from passion flower, is thought to prevent the conversion of testosterone to estrogen. As a result of this blocking action, it helps to raise free testosterone levels naturally.
* Raw pine pollen is the richest seedbed of testosterone derived from plants; since it is the male sperm of pine trees.
* [[Fenugreek]] has a reputation for boosting testosterone. It is now being included as the primary ingredient in many testosterone boosting supplements.
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