|
Why Be a Vegetarian?
Kate Ruley, Campus Nutritionist
Vegetarianism has been around for as long as humans have. According to the Vegetarian Resource Group, in 2000 4.8 million people (or approximately 2.5% of the US population) consistently followed a vegetarian diet. People may choose a plant-based diet for a host of reasons, and if it’s good health they’re after, kudos for them. Research has shown that a diet high in grains, fruits, vegetables, legumes, nuts, seeds, and plant oils can reduce one’s risk for heart disease, type 2 diabetes, prostate and colon cancers, while also lowering cholesterol and blood pressure.
Interest in vegetarianism in increasing as evidenced by the growing number of vegetarian menu selections offered in restaurants and on college campuses. Vegetarian diets come in many forms, including: 1) the strict vegan (or total vegetarian) eating pattern that is based on grains, fruits, vegetables, legumes, seeds, and plant oils only; 2) the lacto vegetarian eating pattern which includes all foods listed in the vegan diet plus dairy products; 3) the lacto-ovo vegetarian eating pattern, which includes the vegan list, dairy products, and eggs; and, 4) the semi-vegetarian, which can loosely be defined as someone who is an occasional meat eater who predominately practices a vegetarian diet.
Regardless of the specific vegetarian eating pattern you choose to follow, variety is the key to maximizing the positive health effects mentioned above. The American Dietetic Association has created a Vegetarian Food Guide (Figure 1) that outlines the daily needs for a vegetarian eating plan with approximately 1,600 calories. Of course, exercise increases daily caloric needs, so one should add extra servings of calcium-rich foods, grains, and protein-rich foods if any exercise is planned on a given day.
Protein needs can easily be met by consuming a variety of protein-rich foods, as long as vegetarians eat enough calories to maintain their weight. It is not necessary to combine foods in order to meet protein needs. Adequate levels of essential amino acids, those that the body cannot produce, can be consumed if a variety of protein sources are eaten during the day.
Vitamin B12 is found primarily in animal-derived products, fortified foods, and supplements. Vegetarians who eat dairy products and eggs frequently can meet daily B12 requirements. Strict vegans must eat fortified foods and/or take B12 supplements to reach recommended adult levels. Absorption of vitamin B12 is best achieved with small frequent doses during the day. Lacto-vegetarians have calcium intake levels comparable with non-vegetarians, but vegans tend to have levels below daily recommended values. Adults can obtain sufficient levels of calcium by eating at least 8 servings per day of foods that provide 10%-15% of the adequate intake for calcium. If fewer than 8 servings are eaten, a calcium supplement can make up the difference.
There is an abundance of valuable information available to those interested in reading further about vegetarian diets. Research findings, recipes, book recommendations, and travel guides may be found at the list of websites below:
Loma Linda University Vegetarian Nutrition & Health Letter
http://www.llu.edu/llu/vegetarian/vegnews.htm
Food and Nutrition Information Center, USDA
http://www.nal.usda.gov/fnic/pubs/bibs/gen/vegetarian.htm
http://www.nal.usda.gov/fnic/etext/000058.htm
The Vegetarian Resource Group
http://www.vrg.org/
|