In the UK Shopper study, when healthy behaviors were accounted for, both vegetarians and omnivores lived the same amount of time, suggesting that the protective effect observed was from healthy behaviors, not from excluding meat or including more vegetables.

“specifically in the uk shopper study if you look at both vegetarians and omnivores we find that when the healthy behaviors are accounted for they both live the same amount of time meaning that there was no protective effect of eating more vegetables or excluding meat from the diet”