https://journals.plos.org/plosone/article/file?id=10.1371%2Fjournal.pone.0088278&type=printable&fbclid=IwAR2UexAtdXJ7KMoygzSRzBbrblv5RNUPnX8g89KZTZqXQIq_k48PWujzR4w
"Moreover, our results showed that a vegetarian diet is associated with poorer health (higher incidences of cancer, allergies, and mental health disorders), a higher need for health care, and poorer quality of life."
Burkert NT, Muckenhuber J, Großscha¨dl F, Ra´sky E´, Freidl W (2014) Nutrition and Health – The Association between Eating Behavior and Various Health Parameters: A Matched Sample Study. PLoS ONE 9(2): e88278. doi:10.1371/journal.pone.0088278