I can almost immediately feel the effects myself from just a week’s exercise and the major benefits in general well being and lust. No scientific evidence of course, but I think research should begin looking there...
There is so much shit (literally) in our water and food supply. But also birth control, opioids, microplastics, you-name-it. Seattle mussels test positive for opioids(1). Chemicals leech from plastics. America has mass-scale addiction to prescription drugs. Pollution is everywhere the world. Neurotoxins are household gardening or anti-pest remedies.
Livestock have also shifted from grazing to eating soy- or corn-based products. Fish are more-likely to be farmed.
Nobody knows what the true long-term consequences of this are.
I think people would also be surprised to see what happens on farms. Seeing chickens and pigs eat mice and rats while knowing how much garbage and neurotoxins are laid out for those pests--they end up inside humans.