A plant-based diet has been linked to a longer life, with some studies suggesting that it can add more than 10 years to an individual's lifespan. Researchers from Norway found that a 20-year-old could add a decade to their life expectancy by switching to a plant-based diet, while an 80-year-old could add three years. The largest gains in life expectancy were linked to eating more legumes, whole grains, and nuts, while reducing red meat and processed meat consumption. This way of eating has also been associated with a reduced risk of heart disease, certain cancers, obesity, diabetes, and cognitive decline.
What You'll Learn
A plant-based diet can reduce the risk of heart disease
A plant-based diet can add years to your life, according to a study published in PLOS Medicine. The study found that a 20-year-old adopting a plant-based diet could add 10 years to their life, while an 80-year-old could add three years. Even partial changes to a plant-based diet can have a significant impact, with the potential to add six years to a person's life expectancy.
Plant-based diets are associated with a reduced risk of heart disease, which is the leading cause of death in the United States and worldwide. Heart disease is often caused by plaque buildup in the arteries due to high cholesterol and saturated fat consumption. Plant-based diets are beneficial for heart health because they contain no dietary cholesterol, very little saturated fat, and abundant fiber.
Multiple studies have shown that a plant-based diet can prevent, manage, and even reverse heart disease. One landmark study by Dr. Dean Ornish found that a plant-based diet, combined with regular exercise and a healthy lifestyle, significantly improved blood flow to the heart within a month. After a year, severely blocked arteries had reopened. Another study by Dr. Caldwell Esselstyn published similar results, finding that a plant-based diet reduced the narrowing of the arteries and improved blood flow to the heart.
Plant-based diets can also help improve several risk factors for heart disease, including high blood pressure, high cholesterol, inflammation, and excess weight. Replacing meat with beans, tofu, tempeh, or lentils, and consuming at least two servings of fruit and three servings of vegetables daily, can improve heart health. Additionally, keeping saturated fat intake low by avoiding animal products, ultra-processed foods, and tropical oils is recommended for maintaining a healthy cardiovascular system.
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It can also lower the chances of certain types of cancer
A plant-based diet can add years to your life, according to a study published in PLOS Medicine. The study found that a 20-year-old could add 10 years to their life by adopting a plant-based diet, while even an 80-year-old could add three years to their life expectancy.
Plant-based diets are full of fruits, vegetables, legumes, and whole grains, with little to no meat or other animal products. This type of diet is particularly effective at lowering the chances of certain types of cancer.
Research has shown that a plant-based diet can reduce the risk of cancer due to the presence of phytochemicals, which are chemical compounds that protect the body from damage and interrupt processes in the body that encourage cancer production. Phytochemicals also decrease inflammation and have antioxidant properties, further contributing to their cancer-fighting abilities.
One of the key mechanisms by which plant-based diets lower cancer risk is through their high fiber content. Fiber has been shown to reduce the risk of breast and colorectal cancer. The American Institute for Cancer Research found that for every 10-gram increase in fiber intake, there was a corresponding 13% improvement in survival rates after a cancer diagnosis. Additionally, young women who consumed high-fiber diets were 25% less likely to develop breast cancer later in life.
Another way that plant-based diets fight cancer is by reducing certain types of inflammation. Inflammation is linked to the development and progression of various types of cancer. By incorporating more anti-inflammatory foods, such as dark chocolate, avocados, tea, and nuts, plant-based diets can help lower the risk of certain types of cancer.
The combination of specific plant-based foods has also been shown to be more effective at slowing tumor growth than individual foods alone. For example, a study on prostate cancer found that a diet combining tomatoes and broccoli was more effective at slowing tumor growth than a diet with only one of those foods. This highlights the synergistic effects of plant-based compounds when combined in the diet.
In summary, a plant-based diet can be a powerful tool in lowering the chances of certain types of cancer. By incorporating a variety of plant-based foods, individuals can take advantage of the synergistic effects of phytochemicals, fiber, and anti-inflammatory compounds to reduce their risk of cancer and improve their overall health.
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It can help with weight loss
Adopting a plant-based diet can be an effective way to lose weight and keep it off. Research shows that people who eat plant-based diets tend to be leaner than those who don't. A review of 19 intervention studies found that participants assigned to plant-based diets lost weight. This is mainly due to plant-based diets being lower in calories and higher in dietary fibre, which helps you feel full and reduces your appetite.
A Dutch study presented at the European Congress on Obesity in 2022 found that overweight people lost an average of 16 pounds after eating a plant-based diet for three months. The weight loss was attributed to three key factors: reduced calorie intake, lower fat content in meals, and higher dietary fibre intake.
Plant-based diets are also associated with lower body mass index (BMI) scores. A large systematic review published in Diabetes, Metabolic Syndrome, and Obesity found that plant-based diets could aid weight loss in multiple populations, including those who are overweight, have type 2 diabetes, cardiovascular disease, or rheumatoid arthritis.
However, it's important to note that simply eliminating animal products is not a guaranteed way to lose weight. A well-rounded plant-based diet should include protein-rich plant foods like beans, legumes, tofu, seitan, and tempeh to ensure adequate nutrition.
- Transition slowly: Instead of making drastic changes, start by replacing one meal with animal products with a plant-based meal each day. Gradually increase the number of plant-based meals until your entire daily menu is plant-based.
- Avoid an "all-or-nothing" mentality: It's okay to start by adding more vegetables to your favourite meals or eating fruit as dessert. You don't have to go fully plant-based right away.
- Learn about plant-based swaps: Experiment with different plant-based proteins and recipes. For example, use flax "eggs" and plant oils instead of animal products in baking.
- Don't forget about protein: Include protein-rich plant foods like beans, legumes, tofu, seitan, and tempeh in your diet to ensure you're getting enough of this essential macronutrient.
- Keep meal planning simple: You can create healthy plant-based meals in less than 10 minutes. Try a bag of frozen precooked rice, a bag of stir-fry vegetables, some shelled edamame, and a small amount of bottled sauce.
- Get strategic for satiety: Include a protein and fibre source with every meal to keep you full and reduce the likelihood of overeating.
- Pay attention to food labels: Just because a food is advertised as plant-based doesn't make it healthy. Read labels and watch out for saturated fats, added sugars, and sodium content.
In conclusion, a plant-based diet can be an effective tool for weight loss due to its lower calorie and higher fibre content. However, it's important to ensure your diet is balanced and includes adequate protein. By making a gradual transition and following these tips, you can lose weight and improve your health with a plant-based diet.
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It can reduce the risk of diabetes
A plant-based diet can reduce the risk of diabetes. Research has shown that a plant-based diet can reduce the risk of developing type 2 diabetes by 24% to 77%. This is because plant-based diets tend to be low in saturated fat, advanced glycation end products, nitrosamines, and heme iron, which are associated with insulin resistance. Plant-based diets are also high in fiber, antioxidants, and magnesium, which promote insulin sensitivity.
Observational studies have found that the prevalence and incidence of type 2 diabetes are significantly lower among those following plant-based eating patterns compared with omnivores and even semi-vegetarians. For example, in the Adventist Health Study-2, vegans had a 49% lower risk of developing diabetes compared to non-vegetarians.
Plant-based diets can also be effective in treating type 2 diabetes. A meta-analysis of six randomised controlled trials found that vegetarian diets were associated with a 0.4% greater reduction in glycated haemoglobin (HbA1c) when compared with other prescribed eating patterns for diabetes. A randomised controlled trial comparing a low-fat, vegan diet to a conventional portion-controlled diet found that the vegan group had a significantly greater reduction in HbA1c (1.23% compared with 0.38%).
In addition to reducing the risk of diabetes, plant-based diets have been found to reduce the risk of cardiovascular disease, the leading cause of death in people with diabetes, and its risk factors such as obesity, hypertension, hyperlipidaemia, and inflammation. Plant-based diets can also help reduce the risk of cancer, the second leading cause of death.
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It can also help with managing type 2 diabetes
Adopting a plant-based diet can be beneficial for people with type 2 diabetes. Research has shown that it can help people better manage their diabetes and prevent dangerous complications from developing, like heart disease.
- Vary your protein sources: Diversify your sources of plant-based protein. Foods like seitan, whole grains, legumes, nuts and leafy greens are great vegan sources of protein.
- Choose complex carbs: Focus on whole grains like brown rice, oats, whole-wheat bread or whole-wheat pasta. Other foods like fruits, vegetables and legumes are healthy sources of complex carbs that are the cornerstone of a healthy plant-based diet.
- Limit highly processed snacks: Opt for whole foods like celery or fruit with nut butter, pita with hummus or roasted chickpeas.
- Prioritize certain nutrients: Meet your vitamin B12 needs with fortified breads, cereals and soy products, as well as plant-based milks like almond, rice, hemp and coconut milks. Nutritional yeast is another great plant-based source of vitamin B12. Include plenty of leafy greens, whole grains and legumes to meet your iron needs.
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Frequently asked questions
According to a study by researchers in Norway, a 20-year-old could add 10 years to their life expectancy by switching to a plant-based diet. Even making a partial change to a plant-based diet could add six years, and an 80-year-old who starts eating plant-based could add three years to their life expectancy.
A plant-based diet can help with weight loss, and it can also lower the risk of certain chronic diseases, such as heart disease, some types of cancer, cognitive decline, and diabetes.
A plant-based diet focuses on whole, minimally processed foods and includes vegetables, fruits, whole grains, legumes, seeds, and nuts. It also usually involves reducing or avoiding animal products.