Food studies are all over the place because they never account for genetics. Look up Nutrigenomics to understand more, But a great example is changes in the FA

Food studies are all over the place because they never account for genetics. Look up Nutrigenomics to understand more, But a great example is changes in the FADS genes and how they impact the intake of long and short chain Omega 3s https://www.mdpi.com/2072-6643/10/6/758 https://www.mdpi.com/2072-6643/10/6/758 Unless they are testing people with the same genetics, a meat versus plant diet will continue to result in different outcomes.