I went in hoping to see a scientific comparison of how diets impact your body. Using twins as a baseline seemed like a great idea. The two diets would be plant-based versus meat-based. Within 15 minutes of the first episode, it became apparent that the series was pro-vegan. Every "expert" talked about the benefits of plant-based diets and the evils of the standard American diet. The problem is that you can eat a healthy meat-based diet using grass-fed quality meats. But all I ever heard was how unhealthy hotdogs and other processed meats are. Duh.
I stopped watching before the end of the first episode. I would have preferred a test comparing the standard American diet to something like the Mediterranean one. Or a diet without processed foods compared to one with processed foods. This was a missed opportunity.
When the experts compared the pros/cons of the vegan/omnivore diets, you could easily see that NEITHER diet gave you all the nutrients your body needed. It's almost like a BALANCED diet of quality meats and vegetables would provide your body with all the required nutrients.