i've attempted numerous experiments with taking fish oil / otherwise upping my omega 3 intake, and almost without fail i've noticed a (dose-dependent) flatlining of my libido (i'm male) as a result. i did some digging around on the interwebs and apparently a number of other men have noticed this same effect:
the flatlining is always temporary, and always lifts after a few days of discontinuing the fish oil. i suspect that eating a lot of fatty fish has the same effect for me, though that's hard a little harder to track since i don't eat it very often. i feel otherwise good on fish oil--in some ways better than usual--and i'm young and otherwise very fit / healthy / eat paleo.
this doesn't appear to be a common effect (it seems like most people, men included, notice an increased libido, if they notice any effect at all), but judging from what i've been able to dredge up it doesn't seem entirely UNcommon, either. so my question is: assuming this phenomenon is real, what POSSIBLE hormonal / endocrine mechanism could account for this effect?