A book I read a couple years ago (I think Peter Attia's) said one of the clearest nutritional studies just sent a weekly bottle of olive oil to half the participants, who had better health results than the control group. They didn't track exactly what people ate, but figured they probably used recipes with olive oil and ended up closer to a Mediterranean diet.

Of course that doesn't necessarily mean it translates to extreme longevity.

If I had attention of food scientists and motivation, I'll eat better. Is this experiment controlled for that?

I haven't read the study itself, but normal practice is to give the control group some kind of attention that doesn't include the intervention you're testing.

I've been following nutrition "science" for the past 10 years, and to say it's cluster fudge is an understatement.

I recommend checking out Gill Carvalho (https://www.youtube.com/@NutritionMadeSimple). He helped me realize that nutrition science isn’t a controversial as it would seem from reading the popular press or the occasional study showing that bacon and Oreo cookies are good for your heart. It took five or ten videos to get a feel for how real scientists interpret new information. He explains the relative power of different types of scientific evidence, etc. Good stuff. He covers the Omega-3 AFib connection. If I remember correctly, Omegas-3s improve several cardiovascular risk factors, but also increase the risk of AFib. So, depending on your current situation, you may want to increase or decrease your intake. Deficiency is definitely bad, but you can also overdo it. I decided that sardines a few times a week is probably safer for me than the fish oil capsules I was taking daily.

He's on my list of "science advisors" as well (Dr. Patrick being the OG in this regard).

Another that bridges the gap is https://www.youtube.com/physionic

Thanks for the recommendation. Will check it out!