Complementary Proteins: A Necessary Option for Vegetarians

Introduction:

As known, a balanced and varied diet comprises a variety of plant and animal-based protein, fiber, carbohydrates, and heart-healthy mono and polyunsaturated fats in good measure. However, for vegans or vegetarians who consume a limited range of foods, meeting the daily protein requirements may be an issue. A completely proteinaceous diet and diet in which the body would be ideally getting all the essential amino acids is hard to obtain. A proteinaceous diet is needed for sustaining muscle protein synthesis or muscular metabolism. That is why it is difficult for vegans or vegetarians to balance the protein deficit or add more protein to their diet. Hopefully, in nutrition science, there are solutions of complementary proteins for vegans and vegetarians. If someone is a strict follower of the vegan or vegetarian diet, they may have several advantages that plant protein-rich diets have to offer. However, one of the minor drawbacks of these diets is that one may have to pay more attention to the types of protein sources. This is because, plant proteins are considered incomplete proteins, meaning that they do not contain all of the essential amino acids needed for protein metabolism and muscle synthesis in the body.

What Is the Importance of Essential Amino Acids?

A combination of different kinds of protein sources would ensure that the body is enriched with an abundant supply of all the essential amino acids daily. There are numerous complete protein-rich options or sources for vegans or vegetarians to experiment with, which one can easily incorporate into their daily diet. These are the essential amino acids that the human body cannot manufacture or synthesize by itself. These amino acids are known as essential amino acids because one has to intake or consume them via their daily diet. Human bodies need more protein via essential amino acids to sustain the metabolism and health of the muscles, skin, organ systems, and tissue healthy. The other major functions of proteins are tissue repair and maintaining cellular functions for muscle building.

What Are the Needs of Proteins and Essential Amino Acids in Diet?

Nutrition experts advise that it is essential to gain at least 10 to 35 percent of the daily dietary calories from protein sources. Further, in dynamic phases of life such as pregnancy or lactation, individuals' nutritional requirements rise for additional doses of protein to compensate for the metabolic rate. A diet that is not rich in protein may also further reduce not only immunity but also healing properties of the body. Persons may suffer from poor muscular, broken nails, and poor hair health along with an increased predisposition to bone fractures. Vegans and vegetarians need to keep in mind or be aware of incorporating the right type of proteins as complete protein sources. These are the essential amino acids that one needs to obtain through their daily diet:

1. Histidine.

2. Isoleucine.

3. Leucine.

4. Lysine.

5. Methionine.

6. Phenylalanine.

7. Threonine.

8. Tryptophan.

9. Valine.

As long as these individuals consume the right amounts of complementary proteins, via the daily diet, one can ensure that their systemic health is on track. Hence, vegans and vegetarians must experiment with plant-based complementary proteins to obtain their ideal dose of daily overall protein and to check possible macronutrient-related deficiencies in the body.

What Are the Drawbacks of Plant Proteins?

Some of the best vegan options are from the protein sources that one obtains from foods such are nuts, grains, and seeds. A registered dietician or nutritionist can help to meet the nutritional requirements based on the body type, body composition, and systemic health status. As animal proteins usually comprise every single one of these essential amino acids, they are known to be complete proteins. If someone has been following the ovo-lacto-vegetarian diet (this is eating eggs and dairy products as well), they would be consuming these complete proteins from the egg and dairy products or grains as well. However, most grains and cereals are further very low in the essential amino acid lysine. Hence, vegetarian and vegan diets must comprise more grains (even though they cannot compensate for the needed lysine content for protein metabolism). To balance the lysine content from this diet, it is important to include or consume varieties of legumes ranging from peanuts, green peas, dry beans as well as lentils. These foods are particularly rich in lysine. The minor drawbacks of legumes are that they are not good sources of tryptophan, methionine, and cystine. However, these amino acids can be found in whole grains and cereals.

This is the reason why grains and legumes are necessary to be included as complementary proteins for vegans and vegetarians because when one combines them into the diet, only then can one consume all of the essential amino acids to meet the daily nutrition requirements. Nuts and seeds are further the best complementary proteins to legumes because they contain some amounts of essential amino acids tryptophan, methionine, and cystine. It is to be noted that the consumption of plant protein is also associated with the consumption of carbohydrates and fibers. That is why, excessive consumption of plant protein may cause indigestion and diarrhea-like symptoms. Also, some individuals are unable to digest legumes and seeds. Advice from the healthcare provider should be taken in such cases.

What Are the Complementary Protein Sources?

Gaining complementary proteins is essential from the following vegan sources :

• Whole grains and legumes.

• Bean soups.

• Crackers.

• Grain pasta.

• Black beans.

• Peas.

• Hummus (chickpeas or tahini mix).

• Lentils.

• Almonds.

• Roasted nuts.

• Seeds (like chia and hemp).

• Peanuts.

• Rice.

• Legume soups.

• Soy foods.

• Tempeh.

• Tofu.

• Soy milk, almond milk, or coconut milk.

• Edamame beans.

• Quinoa.

• Amaranth.

• Buckwheat.

• Spirulina.

Conclusion:

It is crucial to meet the ideal nutritional requirements of individuals who follow a vegetarian or vegan diet by incorporating plant-based proteins and complementary proteins into their protein-rich diet. Ovo vegetarians have the advantage of consuming both complementary proteins and protein from eggs and dairy products. In order to maintain proper protein metabolism, fluid balance, tissue repair, and other essential functions performed by the body cells and organ systems, it is essential to ensure an adequate intake of protein without compromise.