Vitamin Information Center

PROTEIN
Protein is a necessary component for building, maintenance, and repair of many body
systems and processes, including:
•Production of collagen and keratin, which are the structural components of bones, teeth,
hair, and the outer layer of skin; they help maintain the structure of blood vessels
•Manufacture of hormones, such as insulin and thyroid hormone
•Production of enzymes that control chemical reactions in the body
•Proper immune function—production of antibodies, white blood cells, and other
immune factors
•Transportation of oxygen, vitamins, and minerals to target cells throughout the body
MACRONUTRIENTS8 | Chapter 1
•Source of energy—the liver can use protein to make glucose when there is not enough
carbohydrate available, such as when you skip a meal or follow a low-carb diet.
Food Sources
Protein is found in animal products, nuts, legumes, and, to a lesser extent, in fruits
and vegetables. When we eat protein the body breaks it down into amino acids, some
of which are called essential because they must be provided by the food we eat.
Others that can be produced by the body are called non-essential.
Protein from animal sources contains all of the essential amino acids. Therefore,
your best sources of lean protein are chicken, turkey, fi sh, and eggs. Choose free-
range and organic wherever possible to reduce ingesting harmful hormones and
chemicals.
Plant proteins do not contain all the essential amino acids and are considered
incomplete proteins. It is possible, though, to combine various plant proteins to get all
the essential amino acids. For example, eating oats, lentils, and sunfl ower seeds either
together or separately throughout the day provides all the essential amino acids. You
could also combine whole-wheat pasta with white kidney beans or tofu with brown
rice to get all the necessary amino acids. It just requires careful meal planning.
There are certain advantages of eating plant over animal proteins—they pro-
vide fi bre and phytochemicals (antioxidants), do not contain saturated fat, and
may play a role in disease prevention. Soy protein, for example, has been shown to
signifi cantly lower cholesterol and triglyceride levels, and protect against bone loss.
A number of studies have found lower risk of chronic disease in those who eat a
plant-based diet.
The Institute of Medicine recommends ranges for macronutrient intake that are
associated with a reduced risk of chronic disease while providing adequate intake
of essential nutrients. They suggest that adults get 45–65 percent of calories from
carbohydrates, 20–35 percent from fat, and 10–35 percent from protein. Ranges for
children are similar, except that infants and younger children need a slightly higher
proportion of fat (25–40 percent).

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With the growing awareness of the importance of healthy food, many people are also becoming vegetarian because it matches the kind of low fat, high fiber diet recommended by dieticians and doctors. Concern about the environment is another factor as people become more aware of the effect raising animals for their meat is having on the environment. Or you may be concerned about wasting world food resources by using land to raise animals for meat instead of growing crops that can feed more people directly.

Animals need far more water than grain crops. According to the USDA, growing the crops necessary to feed farmed animals requires nearly half of the United States’ water supply and 80% of its agricultural land. Additionally, animals raised for food in the U.S. consume 90% of the soya crop, 80% of the corn crop, and a total of 70% of its grain.

One acre of pasture produces an average of 165 pounds of beef; the same acre can produce 20,000 pounds of potatoes.

Vegetarian diets have been found to satisfy the nutritional needs for all stages of life, and large-scale studies have shown vegetarianism to increase longevity, improve health, and significantly lower the risks of many diseases.

Studies show that vegetarian diets help to keep body weight under control and reduce the risk of heart disease, osteoperosis and many cancers - particularly lung cancer and colon cancer. Vegetarians tend to have lower levels of cholesterol, lower blood pressure, and less incidence of dementias such as Alzheimer’s. Vegetarian diets that are low in saturated fats have been successfully used to reverse severe coronary artery disease.

It was once widely believed that vegetarians had to carefully combine plant protein sources in each meal in order to obtain all the essential vitamins, minerals and amino acids needed to stay healthy. However, scientific studies have shown that the human body can store essential amino acids and combine them as necessary. So, while combining beans and rice, or peanut butter and bread produces a complete protein, it’s not necessary to consciously do this at every meal. If you eat a varied diet and adequate calories, combining proteins is not an issue.

Vegetarian diets are lower in saturated fats, cholesterol, and animal protein. They’re also high in folate, anti-oxidant vitamins like C and E, carotenoids, and phytochemicals.

Some famous vegetarians are Leonardo Da Vinci, Charles Darwin, Socrates, Plato, Sir Isaac Newton and Thomas Edison. Famous modern day vegetarians include Bryan Adams, Alicia Silverstone, Liv Tyler, Jerry Seinfeld, Kim Basinger, and Paul McCartney.

If you are new to vegetarianism, The Higher Taste by Srila Prabhupada is a great beginners booklet. Not only does it explain vegetarianism clearly but it also gives some delicious easy to follow recipes.

There are many vegetarian websites today that provide many delicious recipes. There are a large variety of vegetarian recipes available from Italian and Greek cuisine to Middle Eastern, Indian and Chinese cuisine.

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