Plant-Based Diets Could Save 129 Million Years of Human Life — Every Single Year
Science reveals a low-hanging fruit for health and the planet — simple, powerful, and too important to ignore
Today, I’m revisiting a study I’ve written about before — one that still hasn’t gotten nearly the attention it deserves.
So in this piece, I’ll take another look — this time with fresh highlights that reveal just how far-reaching the study’s implications really are. Taken seriously, these insights could do more than boost personal health — they could reshape the future of humanity.
What Exactly Did the Study Explore?
The researchers asked a bold question: What would happen to both our health and our planet if humanity shifted its eating habits between now and 2050?
To get there, they modeled different dietary futures — from “business as usual” to scenarios where plant-based diets become the global norm. What makes this study unique is its scope: for the first time, scientists estimated both the health benefits and the climate impacts of our food choices across every major world region.
What Did They Find?
The diet that outperformed all others by a wide margin for both health and the environment was the plant-based one.
Based on detailed modeling, the researchers estimate that by 2050, a global shift to a plant-based diet could prevent 8.1 million deaths per year and save 129 million life years annually. This represents a 10% reduction in deaths from all causes worldwide each year, along with yearly healthcare savings of over $1 trillion.
Fully plant-based (vegan) diets performed better than vegetarian diets, and both were far more beneficial than diets based on global guidelines for healthy eating and energy intake (HGD). The difference is striking: even compared with HGD, millions more lives could be saved under a plant-based scenario — every single year. Despite persistent myths about plant-based diets, the evidence shows they are safe and profoundly beneficial.
What explains these benefits?
According to the researchers, it comes down to a combination of factors: eating more fruits and vegetables, maintaining lower rates of overweight and obesity, and reducing the risks of chronic diseases such as coronary heart disease, stroke, cancer, and type 2 diabetes. All of these improvements — and more — are closely linked to cutting back on animal products.
Additional Insights
Individual Benefits
The study didn’t just look at regional totals — it also measured benefits on a per-person basis, showing how much individuals could gain. By this measure, the effects were especially strong in high-income countries, where people consume disproportionately more animal products. Here, the per-person benefits of shifting to plant-based diets would be twice as large as in lower-income regions.The Value of Longer Lives
When you factor in what individuals would be willing to pay for the additional years of life gained through plant-based eating, the benefits could total a staggering $30 trillion per year — about 13% of global GDP.Cutting Emissions
Adopting plant-based diets could reduce food-related greenhouse gas emissions by 70%, with the economic value of those avoided emissions reaching up to $570 billion.
Are These Findings Credible?
Given how striking these results are, some might be tempted to dismiss them as “vegan propaganda.” In reality, nothing could be further from the truth. This work was published in the Proceedings of the National Academy of Sciences (PNAS), one of the world’s most respected scientific journals.
The research was conducted by health experts at the University of Oxford, ranked first in the world for Medicine by the Times Higher Education World University Rankings — not just this year, but for 14 consecutive years.
Furthermore, the study’s findings are backed by extensive research, including reports from the United Nations and articles in prestigious journals like Nature Food and Science that have reached very similar conclusions.
The reason these results might still seem surprising — and why they aren’t already common knowledge — is largely due to industry-funded misinformation. The meat and dairy industries have a long, well-documented history of spreading misleading information to protect their profits.
Final Thoughts
What I’ve covered about health and the climate is only the beginning. The full harm caused by consuming animals runs much deeper than a single post can capture.
While we’ve looked at years of human life gained, we haven’t even considered the lives taken from farmed animals each year, which I wrote about last week. If humans were killed at the same rate as animals for food, we’d be extinct in just 2.5 days. The impacts of animal farming extend just as radically to antibiotic resistance, pandemic risk, world hunger, biodiversity loss, ocean dead zones, land and water use, air pollution, rainforest destruction, and much more.
The good news? Plant-based diets offer a simple, achievable solution that anyone can adopt. They improve our health, protect the planet, show kindness to animals — and even save money. It’s not a trade-off; it’s a win-win-win.
As world-renowned health expert and best-selling author Dr. Michael Greger, puts it: “The most ethical diet happens to be the most environmentally sound and the healthiest.” In other words, plant-based eating checks all the boxes.
Adopting a vegan lifestyle is one of the easiest ways each of us can make a real difference — for our bodies, for the planet, and all the beings we share it with.
Very good article! I only want to make a comment, in case some people do think there is a trade-off: the trade-off of taste.
It might be true that, in the beginning, one might miss the taste of meat. But this is very much a matter of habit. After you stop eating meat for a while, the crave to eat meat that is based on taste goes away. On top of that, it is worth noting that plant-based dishes can be very tasty. People may think that not eating meat is all about eating a salad (which, I must say, even salads can be very tasty). But that is not true. There are plenty of plant-based dishes one can make that they are very delicious.
Thank you for posting this. I made the decision to become a vegan for the sake of the animals. I feel amazing, have lost weight, have lots of energy, love the food, and the little food I miss doesn't matter compared to the suffering I don't help inflict anymore. I grew up Catholic and I don't feel it's possible to be a Christian or an animal lover and still take part in the torture and the slaughter.