A vegetarian diet does not include any meat, poultry, or seafood. It is a meal plan made up of foods that come mostly from plants. These include:
- Vegetables
- Fruits
- Whole grains
- Legumes
- Seeds
- Nuts
- May include eggs and/or milk if lacto-ovo vegetarian
A vegetarian diet contains no animal proteins (unless lacto-vegetarian or lacto-ovo vegetarian). A semi-vegetarian diet is a meal plan that contains little animal protein, but mostly plant-based foods. Vegetarians do not eat:
- Fowl
- Seafood
- Beef
- Pork
- Lamb
- Other animal meats, such as bison, or exotic meats like ostrich or alligator
Vegetarians also do not eat products containing gelatin or rennin (an enzyme found in calf's stomachs that is used to produce many cheeses).
Here are the different types of vegetarian diets:
- Vegan: Includes only plant-based foods. No animal proteins or animal by-products such as eggs, milk, or honey.
- Lacto-vegetarian: Includes plant foods plus some or all dairy products.
- Lacto-ovo vegetarian: Includes plant foods, dairy products, and eggs.
- Semi- or partial vegetarian: Includes plant foods and may include chicken or fish, dairy products, and eggs. It does not include red meat.
- Pescatarian: Includes plant foods and seafood.
Function
BENEFITS OF A VEGETARIAN DIET
A well-planned vegetarian diet can meet your nutrition needs. Reducing the amount of meat in your diet may improve your health. Eating a vegetarian diet may help you:
- Reduce your chance of developing obesity
- Reduce your risk for heart disease
- Lower your blood pressure
- Lower your risk for type 2 diabetes
Compared to non-vegetarians, vegetarians usually eat:
- Fewer calories from fat (especially saturated fat)
- Fewer overall calories
- More fiber, potassium, and vitamin C
Recommendations
DIETARY TIPS FOR VEGETARIANS
When following a vegetarian diet, keep in mind the following:
- Eat different kinds of foods, including vegetables, fruits, beans, nuts, seeds, whole grains, and low-fat or fat-free dairy and eggs if your diet includes these.
- Choose fortified foods, such as cereals, breads, soy or almond milk, and fruits juices to get a full range of nutrients.
- Limit foods that are high in sugar, salt (sodium), and fat.
- Include a protein source with all meals.
- If your diet lacks certain vitamins and minerals, take supplements.
- Learn to read the Nutrition Facts Label on food packages. The label tells you the ingredients and nutrition contents of the food product.
- If you follow a more restrictive diet, you may want to work with a dietitian to make sure you are getting enough nutrients.
Alternative Names
Lacto-ovovegetarian; Semi-vegetarian; Partial vegetarian; Vegan; Lacto-vegetarian
References
Barrett KJ, Gilley SP, Haemer MA, Krebs NF, Johnson SL. Feeding healthy infants, children, and adolescents. In: Kliegman RM, St. Geme JW, Blum NJ, et al, eds. Nelson Textbook of Pediatrics. 22nd ed. Philadelphia, PA: Elsevier; 2025:chap 61.
Hensrud DD. Diet and nutrition. In: Goldman L, Cooney KA, eds. Goldman-Cecil Medicine. 27th ed. Philadelphia, PA: Elsevier; 2024:chap 13.
Mason JB, Booth SL. Vitamins, trace minerals, and other micronutrients. In: Goldman L, Cooney KA, eds. Goldman-Cecil Medicine. 27th ed. Philadelphia, PA: Elsevier; 2024:chap 249.
National Institutes of Health website. Office of dietary supplements. Dietary supplement fact sheets. ods.od.nih.gov/factsheets/list-all/. Accessed October 21, 2024.
US Department of Agriculture and US Department of Health and Human Services. Dietary Guidelines for Americans, 2020-2025. 9th Edition. www.dietaryguidelines.gov. Updated December 2020. Accessed October 9, 2024.
Review Date 10/9/2024
Updated by: Linda J. Vorvick, MD, Clinical Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.