No the other way round dude... Flaxseeds can reduce testosterone. However the decrease in testosterone would be very small and nothing to worry about...Ref: http://www.bodybuilding.com/fun/berardi40.htmGB
So it's my opinion that neither flax oil nor flaxseeds will decrease your Testosterone levels. In fact, supplementing your diet with these two products may actually increase your Testosterone production. And if T doesn't even change one bit, you still have the benefits of flax oil discussed above.