There has long been consensus that vegetarian diets are healthier than diets that rely heavily on meat. But we may only be starting to learn just how much healthier they can be. New research suggests that if we all ate a vegetarian diet, one-third of early deaths could be prevented.
“We have just been doing some calculations looking at the question of how much could we reduce mortality [by] shifting toward a healthy, more plant-based diet—not necessarily totally vegan—and our estimates are that about one-third of early deaths could be prevented,” Dr. Walter Willett, professor of epidemiology and nutrition at Harvard Medical School, said during a medical conference in Vatican City last month.
“That’s not even talking about physical activity or not smoking, and that’s all deaths—not just cancer deaths,” he added. “That’s probably an underestimate, as well as that it doesn’t take into account the fact that obesity is important, and we control for obesity.”
Nutrition Experts Aren’t Surprised
Hultin’s organization concluded in 2009 that “appropriately planned vegetarian diets, including total vegetarian or vegan diets, are healthful, nutritionally adequate, and may provide health benefits in the prevention and treatment of certain diseases.”
Specifically, these diets are tied to a lower risk of heart disease, high blood pressure, obesity, cancer, and chronic diseases.
Halas-Liang told Healthline she’s also seen patients with lupus and rheumatoid arthritis “just completely get control” of the disease through eating more plants.
A study in 2013 funded in part by the American Institute for Cancer Research (AICR) concluded that vegetarians had a nearly 10 percent lower risk of developing cancer than nonvegetarians.
Switching to Vegetarian Isn’t All That Simple
With all those potential benefits, shouldn’t we all go vegetarian?
It’s not that simple.
But it can be tricky to switch to a healthier diet without facing unintended drawbacks, perhaps with health impacts of their own.
“For some people, it can be incredibly hard to give up cheese or a Friday night burger. The patient does better when they feel a draw to try the diet out, rather than being told to do so,” she said.
Halas-Liang said she has a colleague who tells all his clients to go vegan. Halas-Liang has warned him that the clients are “just going to tune you out.”
“Food is very personal. People have memories tied to food,” Halas-Liang said. “I find that heavily restrictive diets can lead to disordered eating that can lead to eating disorders.”
“If somebody loves to sit down to a steak dinner a few times a week, and you say, ‘Hey, you should be a vegetarian,’ you’re going to completely turn them off,” Halas-Liang said. “It’s about reaching a client where they are.”
Matthew Berger is a contributor to Healthline, which originally published this article.