Do Vegans Live Longer? What the Science and Centenarian Communities Say

When it comes to diet and lifespan, few questions spark as much debate as: Do vegans live longer? Some argue that a plant-based diet is the key to a long and healthy life, while others say it makes little difference.

The truth lies somewhere in between. A well-planned vegan diet is linked to a lower risk of chronic diseases, and when you look at the world’s longest-living people, most eat very little or no meat.

So, does being vegan add years to your life? Let’s explore what the research shows, what we can learn from the Blue Zones, and why eating more plants could help you live not only longer, but better.

What the Research Says on Veganism and Longevity

Researchers have studied diet and lifespan for decades. While results vary, evidence leans in favour of plant-based diets.

Key findings include:

• A large modelling study published in PNAS estimated that shifting towards plant-based diets could increase life expectancy by around five to seven years.
• The Adventist Health Study 2, which tracked tens of thousands of people, found that vegans had a 15% lower risk of early death compared with meat-eaters. Vegetarians overall also had lower all-cause mortality.
• Reviews of veganism and ageing show plant-based diets are consistently associated with better health markers such as lower blood pressure, lower cholesterol, healthier weight, and reduced inflammation.

The quality of the diet matters most. A vegan diet built on whole foods such as vegetables, fruit, legumes, nuts, seeds, and whole grains shows the greatest benefits. A diet of crisps, biscuits, and fizzy drinks may be vegan, but it won’t support longevity.

The Blue Zones: Lessons from the World’s Longest-Lived People

The Blue Zones are regions of the world where people regularly live into their 90s and 100s in good health. They include Okinawa (Japan), Sardinia (Italy), Nicoya (Costa Rica), Ikaria (Greece), and Loma Linda (California).

What do their diets have in common?

• A meta-analysis of 154 dietary surveys across Blue Zones found that 95% of centenarians ate plant-based diets, meaning the majority of their calories came from plants (NCBI).
• The Blue Zones organisation itself states that diets in these areas are “95–100 percent plant-based.” (Blue Zones)
• People in Blue Zones do sometimes eat small amounts of meat, eggs, or fish, but the core of their diet is plant-based (Blue Zones, Mayo Clinic Press).

Typical staples include beans, sweet potatoes, leafy greens, lentils, seasonal vegetables, nuts, and whole grains. Meat is consumed sparingly, often just a few times per month.

Of course, diet is only part of the picture. Blue Zone populations also share other longevity habits:

• Regular, natural movement in daily life
• Strong family and community connections
• A sense of purpose
• Stress management rituals
• Eating in moderation (for example, Okinawans’ practice of hara hachi bu – eating until 80% full)

Together, these factors help explain why Blue Zone residents live so long, with low rates of chronic disease. I highly recommend watching the Blue Zones documentary “Live to 100” on Netflix.

Seventh-Day Adventists: A Modern Example

In Loma Linda, California, itself a Blue Zone, the Seventh-Day Adventist community provides a living example of plant-based longevity. Many Adventists follow vegetarian or vegan diets, avoid smoking and alcohol, and place emphasis on rest and community.

Research shows:

• Adventist men who follow plant-based diets live around 7–10 years longer than average Californian men.
• Adventist women live 4–6 years longer than their Californian peers.
• Adventists have lower rates of heart disease, diabetes, and obesity compared to the general U.S. population.

They demonstrate that a modern, largely plant-based lifestyle can extend both lifespan and healthspan – the number of years lived in good health.

Why Plant-Based Diets Support Longevity

Plant-based diets support health and longevity in several ways:

• Heart health – lower cholesterol and blood pressure reduce risk of heart disease.
• Reduced cancer risk – avoiding processed meats (a Group 1 carcinogen) while eating antioxidant-rich plants protects cells.
• Brain health – omega-3s from chia, flax, and walnuts, plus vitamin A and antioxidants from sweet potatoes, greens, and berries, support memory and cognitive function.
• Lower inflammation – plants are packed with anti-inflammatory compounds.
• Gut health – fibre feeds beneficial gut bacteria, linked to immunity, metabolism, and even mood.
• Healthy weight control – plant foods are nutrient-dense but lower in calories, helping maintain a healthy body weight.

More Evidence on Plant Protein

Another large study tracked more than 130,000 people for 30 years and found clear benefits to eating more plant protein:

• Every 3 % increase in calories from plant protein was linked to a 10 % lower risk of death.
• That same shift reduced the risk of dying from heart disease by 12 %.
• Replacing eggs with plant protein cut the risk of death by 19 %.
• Swapping red meat for plant protein reduced mortality risk by 12 %.

These findings show that it’s not just about how much protein you eat, but where it comes from. Choosing beans, lentils, nuts, seeds, and other plant-based proteins could play a big role in supporting a longer, healthier life.

How Much Longer Do Vegans Live?

It’s difficult to give an exact number because lifespan depends on many factors including genetics, exercise, stress, and sleep. But estimates suggest:

• Vegetarians and vegans may have a 9–12% lower risk of death compared with meat-eaters.
• Life expectancy could increase by five to seven years with a plant-based diet.
• The biggest advantage may be a longer healthspan – more years lived free from serious disease.

A Note on Balance

A vegan diet offers many potential health benefits, but it must be balanced. Nutrients that may require extra attention include:

• Vitamin B12
• Vitamin D
• Omega-3 fatty acids
• Calcium
• Iodine

However, you can get plenty of all nutrients from a whole food diet when you eat correctly. Eating the right foods, fortified foods, getting enough sunshine, or supplements can help cover these needs.

As the evidence shows, the healthiest vegans (and the longest-living Blue Zone communities) rely on simple, whole plant foods, not processed alternatives.

Final Word

So, do vegans live longer? The evidence suggests that they often do, particularly when the diet is based on whole plant foods and combined with healthy lifestyle choices.

The Blue Zones show us that people who eat mostly plants, move daily, and live with purpose can enjoy long, healthy lives. The Seventh-Day Adventists demonstrate the same in modern America.

Being vegan won’t guarantee you reach 100, but it can help stack the odds in your favour. More importantly, it supports not just longer life, but better life, adding vitality and health to the years you have.

Sources

• Orlich MJ, et al. Vegetarian Dietary Patterns and Mortality in Adventist Health Study 2. JAMA Intern Med. 2013.
• Tonstad S, et al. Vegetarian Diets and Incidence of Diabetes in the Adventist Health Study-2. Nutr Metab Cardiovasc Dis. 2013.
• Springmann M, et al. Analysis and valuation of the health and climate change cobenefits of dietary change. PNAS. 2016.
• Norman K, et al. Veganism, Aging and Longevity: New Insights into Old Concepts. Aging (Albany NY). 2019.
• Buettner D. The Blue Zones Solution. National Geographic Books, 2015.
• NCBI: Dietary Patterns in the Blue Zones. National Institutes of Health.
• Blue Zones: Food Guidelines (bluezones.com).
• Netflix. Live to 100: Secrets of the Blue Zones. 2023.
• Fenton, Siobhan. “Vegans live longer than those who eat meat or eggs, research finds.” The Independent, 18 July 2017.