A vegetarian diet can help lower your blood pressure. Japanese and American researchers sifted through data dating back to 1900 all the way up to 2013. Observational studies revealed that vegetarians have lower average systolic and diastolic blood pressure compared to carnivores. Researchers say switching to a veggie diet is more cost-efficient than buying drugs to treat the same problem. And the side-effects of a vegetarian diet, unlike meds, are all good: weight loss, lower cholesterol, and better blood sugar control.