Everything you need to know about plant based diets
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A plant based diet is one that focuses on only or mostly foods from plant sources. This way of eating may have benefits for both a person’s health and the planet.
In this article, we look at what a plant based diet is, the health benefits, and what nutritional considerations a person should make before switching.
What is a plant based diet?
A plant based diet is a diet that involves consuming mostly or only on foods that come from plants. People understand and use the term plant based diet in different ways.
Some people interpret it as a vegan diet, which involves avoiding all animal products.
For others, a plant based diet means that plant foods, such as fruits, vegetables, whole grains, nuts, and legumes, are the main focus of their diet, but they may, occasionally, consume meat, fish, or dairy products.
A plant based diet also focuses on healthful whole foods, rather than processed foods.
Health benefits
Following a plant based diet offers many possible health benefits, including:
Plant based diets are high in fiber, complexcarbohydrates, and water content from fruit and vegetables. This may help to keep people feelingfuller for longerTrusted Sourceand increase energy use when resting.
A 2018 study found that a plant based diet was effective for treating obesity. In the study, researchers assigned 75 people who were overweight or had obesity to either avegan dietor a continuation of their regular diet, which contained meat.
After 4 months, only the vegan group showed a significant weight loss of 6.5 kilograms (14.33 pounds). The plant based vegan group also lost more fat mass and saw improvements ininsulinsensitivity, whereas those who consumed a regular diet with meat did not.
A2009 studyTrusted Sourceon more than 60,000 people also found that vegans had the lowest average BMI, followed by lacto-ovo vegetarians (those that eat dairy and eggs) and pescatarians (people who eat fish but no other meat). The group with the higher average BMI were nonvegetarians.
Lower risk of heart disease and other conditions
A2019 studyTrusted Sourcefrom theJournal of the American Heart Associationfound that middle aged adults who ate diets high in healthful plant foods and low in animal products had a lower risk of heart disease.
Plant based diets may help people prevent or manage diabetes by improving insulin sensitivity and reducinginsulin resistance.
Of the 60,000 people studied in 2009, only 2.9% of people on a vegan diet hadtype 2 diabetes, compared to 7.6% of those eating a nonvegetarian diet.
People eating vegetarian diets that included dairy and eggs also had a lower risk of type 2 diabetes than meat eaters.
Researchers have also looked at whether following a plant based diet can help treat diabetes. The authors of a2018 reviewTrusted Sourceindicate that vegetarian and vegan diets could help people with diabetes reduce their medication needs, lose weight, and improve other metabolic markers.
The authors suggested that doctors might consider recommending plant based diets to people with prediabetes or type 2 diabetes. While veganism showed the most benefits, the researchers stated that all plant based diets would lead to improvements.
People wanting to try a plant based diet should try one that they think they can follow long term.
Nutrition resources
For more science-backed resources on nutrition, visit ourdedicated hub.
Foods to eat
People should focus on eating the following food groups when transitioning to a plant based diet:
Fruits
Share on PinterestPeople who follow plant based diets can eat all types of fruit.
Whole grains are an excellent source of fiber and help maintain stable blood sugar. They also contain essential minerals, such asmagnesium,copper, and selenium.
Just make sure to choose unsweetened plant milk options.
Foods to avoid
Just reducing or eliminating animal products does not automatically mean a plant based diet is healthful. It is also vital to reduce or avoid unhealthful foods, such as:
processed foods
sugary foods, such as cakes, biscuits, and pastries
refined white carbohydrates
processed vegan and vegetarian alternatives that may contain a lot of salt or sugar
excess salt
fatty, greasy, or deep fried foods
Recipes to get started
The following recipes can help a person get started with a plant based diet:
Before starting a plant based diet, people should ensure they take steps to get enough of the following nutrients:
Vitamin B-12
Vitamin B-12 is an essential nutrient for blood and cell health. B-12 deficiency can lead toanemiaand nerve damage. B-12 is present in many animal products but not in many plant based foods.
People who eat a vegan or even a vegetarian diet could consider taking a B-12 supplement or consume products fortified with B-12. Foods include some cereals, plant based milk, and nutritional yeast.
Iron
People following a plant based diet may have to ensure they get enough iron in their diet, as it haslower bioavailabilityTrusted Sourcein plants than meat.
Plant based foods that are a good source of iron include:
Make sure to combine citrus and other vitamin C sources with plant based sources of iron to increase absorption.
Protein
Some people may have concerns about getting enough protein from a plant based diet. However, there is a wide variety of plant based sources of protein, including:
Consuming proteins from a variety of food sources can help provide all the necessary amino acids for good health. For example, people could add a handful of seeds or a spoonful of hummus to tofu or beans.
Omega-3 fatty acids
Share on PinterestA person following a plant based diet may wish to consider taking an omega-3 supplement.
Omega-3 fatty acids are essential as they help reduceinflammation, memory loss, and other chronic conditions, such as heart disease. The two primary omega-3 fatty acids are EPA and DHA.
Fish, seafood, and animal products, such as eggs are among the primary sources EPA and DHA.
While several plant based foods, such as walnuts, hempseed, and flaxseed, contain omega-3 ALA,research showsTrusted Sourcethat the body is slow and inefficient at converting ALA to EPA and DHA. Some people are also genetically at risk for poor absorption of ALA.
Vegetarians exhibit lower levels of DHA and EPA in blood and tissue, which may increase inflammation, memory difficulties, brain fog, and other effects. People following a plant based diet might want to consider taking an omega-3 supplement.
Some dietitians advise vegetarians to reduce the amount of pro-inflammatory linoleic acid they consume. Soybean, corn, sunflower, and safflower oils contain linoleic acid.
Summary
Eating a diet higher in plant foods and lower in animal products can have many health benefits, including weight loss or maintenance and a lower risk of heart disease and diabetes.
If people want to make the switch to a plant based diet, they can start by gradually reducing their meat and dairy intake.
Eating an entirely plant based meal once a week, or swapping out one animal product for a plant based one, can be an excellent place to start.
People may also wish to speak to a doctor or dietitian before making significant changes in their diet.
