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Home / Lifestyle

US study: Vegetarian diet key to a longer life

Washington Post
4 Aug, 2016 12:16 AM3 mins to read

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Animal products such as burgers, steaks and hot dogs are associated with "a variety of bad outcomes", the researchers say. Photo / Martin Sykes

Animal products such as burgers, steaks and hot dogs are associated with "a variety of bad outcomes", the researchers say. Photo / Martin Sykes

Chew on this: new research offers more evidence that vegetarians not only live better, but also longer.

Scientists led by Mingyang Song at Massachusetts General Hospital analysed data from two major studies with more than 150,000 participants to determine whether people who consumed protein from red and processed meats had a significantly higher mortality rate than those who got their protein from plants.

• Scroll down for great vegetarian recipe ideas

The analysis of the 32-year Nurses' Health Study, followed by the Health Professionals Follow-Up Study at Harvard University, didn't just look at the diets of the participants over a year. It reviewed them repeatedly - "specifically how often they consumed portions of particular types of food during the preceding year - every four years," a statement said.

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Song's team found that a 10 per cent increase in proteins from animals resulted in a 2 per cent increase in mortality overall, and an 8 per cent rise in death risk from heart disease. But a 3 per cent increase in protein from plants led to a 10 per cent decrease in mortality and a 12 per cent drop in risk of death from cardiovascular-related mortality.

The findings are clear, said Song, a research fellow at the hospital's clinical and translational epidemiology unit: plant-based proteins from sources such as beans, nuts, quinoa and seeds are a healthier choice than steaks or beef products such as hot dogs. That said, "I wouldn't suggest that everyone switch to vegan," Song added. That's because certain meats - chicken and fish, for example - also carried a much lower mortality risk overall and from heart disease.

But the traditional American diet, rife with animal products such as burgers, meatballs, meatloaf, steaks, eggs and dairy, "is associated with a variety of bad outcomes," Song said.

The research started in the 1980s and totalled "3.5 million person-years". In that time, there were 36,000 deaths among the participants - 13,000 from cancer, 9000 from cardiovascular disease and 14,000 from a mix of other causes.

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"After adjustment for lifestyle and other dietary risk factors, a high consumption of protein from animal sources ... was weakly associated with an increased risk of death, while high consumption of protein from plant sources - breads, cereals, pasta, beans, nuts and legumes - was associated with a lower mortality rate," the statement said.

In some cases, it's not just that meat is bad and plants are good. Processed meats are filled with potentially unhealthy additives.

Song said he began the study because while others had suggested health benefits from a plant-based diet, none looked at the source of protein. "We were able to link information over the years," he said. The data from the two studies "provided a unique opportunity to look at long-term health outcomes".

Delicious vegetarian recipes from Bite.co.nz

• Falafel Burger
• Broccoli and blue cheese soup
• Nadia Lim's Butternut, pea and haloumi fritters
• Egg, potato and cauliflower curry

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• And discover over 100 recipes in our vegetarian collection

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