It’d be great if a burger-a-day diet was healthy. Don’t get me wrong—it’s not the worst. You’ve got protein in there and hopefully some veggies on top (and on the side) , and even some fiber from the roll (you used whole grain, right?).
Unfortunately, study after study shows that meat as a protein source just isn’t that healthy….
Source: Why plant protein is better for you than animal protein | Popular Science
