That study is bullshit.

Here's a study done using the same data but the results are exactly the opposite: https://link.springer.com/article/10.1007%2Fs00508-013-0483-3

"Our results show that a vegetarian diet is associated with a better health-related behavior, a lower BMI, and a higher SES. Subjects eating a carnivorous diet less rich in meat self-report poorer health, a higher number of chronic conditions, an enhanced vascular risk, as well as lower quality of life."

Oh shiiit.

Here's more:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3662288/

" Healthy eating may be best achieved with a plant-based diet, which we define as a regimen that encourages whole, plant-based foods and discourages meats, dairy products, and eggs as well as all refined and processed foods. We present a case study as an example of the potential health benefits of such a diet. Research shows that plant-based diets are cost-effective, low-risk interventions that may lower body mass index, blood pressure, HbA1C, and cholesterol levels."

Oh fuuuck.