Yea, those tests aren't going to give any meaningful data, seeing all the possible confounding variables. Seth Roberts, Dave Asprey, etc. are all super reductionist and kind of autistic in their approach toward self-experimentation and their understanding of health in general. You can't just input fish oil pill, output "moar smart brainz!!!". Its just way more complicated than that. But...people want a simple answer, even if its the wrong one.