T Nation

Is This Supp A Hoax ?


Hello readers,
I have a general question.. A friend of mine was on e-bay and encountered a product produced by PowerNutra, it's called Chrysin-XY.

The product claims that by increasing chrysin levels in the body, it will increase testosterone levels also..

The "studies" have shown a 30% increase in blood testosterone levels..

Since i've never heard of this product before I was wondering how Chrysin levels effect our bodies.. and whether this is a hoax...


You know what else has been shown to increase testosterone levels by 30%? ZMA, go pick up some, no hoax there.


And heavy compound lifting.


I know nothing about this supplement you're talking about, but I did a quick search on pubmed and found the following abstract which may at least explain the theory behind why chrysin might boost testosterone.

J Med Food. 2003 Winter;6(4):387-90. Related Articles, Links

Effects of chrysin on urinary testosterone levels in human males.

Gambelunghe C, Rossi R, Sommavilla M, Ferranti C, Rossi R, Ciculi C, Gizzi S, Micheletti A, Rufini S.

Department of Clinical and Experimental Medicine, Division of Sports Medicine-Laboratorio delle Attivita Motorie e Sportive, University of Perugia, Perugia, Italy. labsport@unipg.it

The equilibrium of sexual hormones in both sexes is controlled in vertebrates by the enzyme aromatase, a member of the cytochrome P450 superfamily, which catalyzes the conversion of androstenedione and testosterone into estrone and estradiol, respectively. Flavonoids are diphenolic compounds present in whole grains, legumes, fruits, and vegetables that are strongly implicated as protective in coronary heart disease, stroke, and cancer.

One flavonoid, chrysin, found in high concentrations in honey and propolis, has been shown to be an inhibitor of aromatase enzyme activity. These foods are often used as supplements, particulary by sportsmen for their energetic and antioxidant properties. The aim of this study was to verify if daily treatment for 21 days with propolis and honey, containing chrysin, would modify urinary concentrations of testosterone in volunteer male subjects. In fact, aromatase inhibition by chrysin could block the conversion of androgens into estrogens with a consequent increase of testosterone, eventually measurable in urine samples. The obtained data did not show alterations of the levels of testosterone in the volunteers after 7, 14, and 21 days of treatment in comparison with baseline values and compared with measurements on the control subjects at the same time. In conclusion, the use of these foods for 21 days at the doses usually taken as oral supplementation does not have effects on the equilibrium of testosterone in human males.


The fact that they did not see any significant effects from chrysin rich food sources does not address the effectiveness of taking large amounts as supplements.

As the absorption via the gut is so poor, one has to take large amounts and this material is expensive, even when purchased in bulk. LEF.org has a product that contains this, along with a pepper extract that improves absorption. But I tried that once and I did not feel that it was doing anything. I am trying to learn more about chrysin to see if it has any value.