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Whether you've become a vegan or vegetarian for environmental, animal rights, or health reasons, one of your primary concerns might be how to avoid nutritional deficiencies and find the protein sources needed for a healthy body.
Proteins, which form up to 20 percent of the human body, control almost all cellular processes in our bodies. They build muscles, repair body tissue, break down food, catalyze chemical reactions, are needed to form hormones and enzymes, and have a crucial role in metabolism and growth.
Proteins are composed of chains of smaller structures called amino acids; these are like the building blocks of all biologic molecules.
Of the 21 amino acids needed in our body, humans can produce only 11; the other 10 must come from the food we eat. Amino acids that depend on diet are called essential amino acids, mostly because they are necessary for the body to function properly.
A high-quality or complete protein is one which contains all 10 essential amino acids. An incomplete protein is one that does not have all of the essential amino acids because it lacks one or two. Complementary proteins are two or more incomplete proteins that when eaten together provide all the essential amino acids. For example, rice has nine essential amino acids, but lacks lysine. Chickpeas have also nine of them, but don’t have methionine, so when eaten together they make a great source of a complete protein.
Getting a daily supply of protein is crucial because your body doesn’t store amino acids. Meat, fish, and poultry are the most common and complete sources of high-quality animal-based protein. Eggs and dairy, although they have less protein content than mean, are also a good source of complete protein.
If you choose to become a vegetarian, you can still get protein from eggs and dairy products. Just avoid using eggs as your only source of daily protein. Egg yolks, while packed with protein and nutrients, are high in cholesterol. Be aware of this, especially if your cholesterol levels are high. If you eat only egg whites, you will be limiting the amount of protein by 40 percent.
Dairy products like milk, cheese, and yogurt also contain a complete protein. Although it’s significantly lower in saturated fat, the protein content in reduced fat and nonfat milk are comparable to that of whole milk.
Today, more people choose to have a vegan diet and lifestyle. Finding an excellent source of daily protein is not a problem, and if you’re worried you’re not getting enough, you can visit a nutritionist or health care provider to review your specific nutrition needs. Recommended daily amounts of protein vary depending on age, gender, physical activity, and health status. Plant-based proteins may be digested differently from animal proteins; it's possible you'll need to adjust the amount you eat.
Here’s a list of the best plant-based protein sources, great for the vegan diet:
Before going vegan, remember to be well informed of the nutritional changes that you‘ll have to make. For instance, some vital nutrients like vitamin B12 are only found in animal products and you may need a supplement.
You can find good plant-based protein sources, but be aware of the fact that digestibility, nutrient absorption, and amount of daily intake may vary. As soy intake is still controversial, you may want to be aware of the amount you take on a daily basis. Choosing from a variety of protein sources is always the best option.
Author’s note: Remember that recommended daily amounts of nutrients vary among populations, gender, age, dietary habits, and health status. For your optimal amount of protein intake per day and the amount of protein and nutrients in food, please consult a nutritionist or health care provider.
*Editor’s Note: The information in this article is intended for your educational use only; does not necessarily reflect the opinions of the Chopra Center's Mind-Body Medical Group; and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health providers with any questions you may have regarding a medical condition and before undertaking any diet, supplement, fitness, or other health program.