I would guess that I've put about the same amount of time into it. I have a ways to go, too.

I wonder if the general thing that kept Less Wrongers away here is not just perfectionism but perfectionism mixed with Bayesianism and unwillingness to try frequentism when forced to by frequentist studies. There's no way to do nutrition with a Bayesian approach unless you have a lot of funding and a willingness to expose large groups of people to harmful controls or nutrient deficiency or overdose studies. There is probably a fair amount of low hanging fruit in large cohort groups for those willing to try new things with the data.

My paper was basically a thesis length frequentist failure to reject the null hypothesis that answered a question slightly different from the one being asked and might have accidentally proved that Nature is fundamental via what I call the nutrient ratio combinatorial explosion hypothesis.

(though you might be able to play around with some interesting results with enough funding to have people submit to regular blood and urine testing for between a week and two months... I think I could probably prove that some vitamins and some minerals are absorbed differently sublingually versus orally).

Perceived unreliability as an income source.