RIBOFLAVIN, A TESTOSTERONE 5a-REDUCTASE INHIBITOR

Riboflavin is a common product of several fungi and bacteria grown under proper conditions 2'3*.
It is used against riboflavin deficiency and hyperlipoproteinemia. It is reported here, for the first time, as a testosterone 5a-reductase inhibitor. (per the study).

Also, riboflavin is a co-factor of many oxido- reductases, while testosterone 5a-reductase utilizes the pyridine nucleotide, NADPH, to reduce testosterone. It is interesting that the co-factor for flavin enzymes, riboflavin, inhibits pyridine linked enzyme reaction.
https://www.jstage.jst.go.jp/article/antibiotics1968/43/12/43_12_1615/_pdf


Vitamin B2 (Riboflavin): Sources, Benefits and Dosage
- See more at: http://www.livescience.com/51966-vitamin-b2-riboflavin.html#sthash.88SQEpEO.dpuf


Vitamin B2 (Riboflavin) Benefits and Signs of Deficiency
http://www.vitamin-mineral-info.com/vitamin-b2-riboflavin-benefits-signs-of-deficiency.php

Vitamin B2, is a water-soluble nutrient which functions to help body cells create energy from the metabolization of carbohydrates, protein, and fat..