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How Switching to a Plant-Based Diet Can Add Years to Your Life

You could live more than a decade longer by eating more plant-based foods.

That’s according to a new study from the University of Bergen in Norway that was published today in PLOS Medicine.

Researchers used existing data from previous analyses and the Global Burden of Disease study to create a model that estimates the effect on life expectancy from a range of dietary changes.

The model is available online and is called the Food4HealthyLife calculator.

“Understanding the relative health potential of different food groups could enable people to make feasible and significant health gains,” the study authors wrote. “The Food4HealthyLife calculator could be a useful tool for clinicians, policy makers, and laypeople to understand the health impact of dietary choices.”

Their key findings:

  • Eating more legumes, whole grains, and nuts, and eating less red meat and less processed meat, increases life expectancy.
  • The greatest increase to lifespan was seen in the 20-something age group. Males saw an average increase of 13 years and females almost 11 years.
  • People in their 60s saw an increase of an average of 8 additional years by making the switch from a modern Western diet to the more-plant based diet.

What experts say

The findings are no surprise to nutrition experts like Kristin Kirkpatrick, MS, RDN, a nutritionist and the author of “Skinny Liver,” and Dr. Danine Fruge, ABFP, the medical director at the Pritikin Longevity Center.

“It has been widely accepted that nutrition has a significant impact on our health at all ages,” Fruge told Healthline. “Our dietary habits can have a dramatic effect on whether we develop disease, reverse disease, and our longevity. Even Hippocrates noted, ‘Let food be our medicine, let medicine be our food.’”

Kirkpatrick adds the results of this study reflect previous data showing that more plants and less processed meats can decrease mortality.

For example, a 2020 analysisTrusted Source published in Critical Reviews in Food Science and Nutrition demonstrated that a high intake of whole grains, vegetables, fruits, nuts, and also coffee is associated with a reduced risk for all-cause mortality. A high intake of red or processed meats was associated with higher all-cause mortality.

It’s never too late or too early

Experts encourage making changes at any age. Fruge explains that in modern culture, as people age, they often feel that they deserve the opportunity to let down their guard and eat anything they want.

“To better enjoy their golden years, evidence suggests the contrary,” she said. “It is more important than ever to supply our aging body the nutrition it needs to enjoy our best health.”

On the flip side, Fruge adds, it’s also often challenging for young people to appreciate the importance of nutrition since they have a great resilience after poor dietary habits.

There are some telltale signs it’s time to make a change, though.

Signs it’s time to for a dietary change

Fruge says brain fog, difficulty concentrating, or an afternoon low that impacts your performance can signal that it’s time for a change.

“A simple telltale tip I use to engage young people is to ask them how they feel on an average day,” she said. “For example, do you need coffee, sugar, or energy drinks to become functional in the morning, or by noon, or to continue through your afternoon?”

Fruge says that many people, especially younger people, enjoy using technology to track health improvements and organize health data.

For example, the healthy food for life calculator used in the study, as well as mindful awareness tools and wearable trackers with alarms as reminders, can be useful and entertaining ways to make important dietary changes.

“It is never too early and never too late for anyone who is motivated to make simple nutritional changes that have powerful and often life-changing effects on both long and short term health,” Fruge said.

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