Source please on the testosterone connection.
As for the mercury, there's a reason why even halfway decent fish oil is distilled... And in fact, January 2012 ConsumerReport:
The lab tested three lots of each brand, bought in New York-area stores. All had their labeled amount of EPA and DHA, omega-3 fatty acids that can reduce the risk of heart attacks and strokes. And none exceeded limits for lead, mercury, dioxins, or polychlorinated biphenyls (PCBs) set by the U.S. Pharmacopeia (USP), a nongovernmental standard-setting group, or by the European Union.
http://www.consumerr...s-vs-claims.htm
So it doesn't exceed some arbitrary limit... Neither does green tea, but you can still get fluorosis.
Below the limit set by the USP does not mean no contaminants. The people dosing with 20g of salmon oil a day might not be doing so well. This is not a concern for the occasional user. However, testosterone very well is:
see hereand thisThe correlations of total testosterone with n-3 fatty acids from fish remained significant after additional adjustment for the other categories of fat (r = -0.27, p = 0. 03 for eicosapentanoic acid and r = -0.32, p = 0.01 for docosahexaenoic acid), while the correlations with saturated and monounsaturated fats became nearly null after the adjustment.
I've also seen more, but I cannot find them at this moment.
Flaxseed oil reduces testosterone
even more, so decide accordingly
. The study, published in the Journal of Nutritional Biochemistry, reported that feeding rats a diet rich in phytosterols, the type of fat found in plants, reduced testosterone in the blood stream by 33 percent.
Edited by hooter, 31 January 2012 - 01:32 PM.