Proteins are essential for human health. They play a role in growth, repair, and many other physiological processes. Soybeans are a great source of protein and contain all the essential amino acids needed to form a complete protein. In this article, we will delve into soybean proteins. We will examine their amino acid profile and discuss their nutritional value. Stay tuned.  

What Is Soybean? 

Soybean is a type of legume. It is native to East Asia and is now cultivated throughout the world. Soybeans are a key source of protein in many diets. They are also a good source of fiber, vitamins, and minerals.  

The soybean plant grows to be about two to three feet tall. The leaves are broad, and the flowers are white or yellow. Soybeans can be green, brown, black, or white. They are typically harvested when they are yellow or brown.  

What Proteins Are In Soybeans? 

Soybeans are a good source of protein. They contain all the necessary amino acids needed to form a complete protein. But what exactly are proteins? Proteins are large biomolecules made up of smaller units called amino acids. There are 20 different amino acids that can be used to build a protein. Soybeans contain all 20 of these amino acids.  

Amino acids are joined together by peptide bonds to form a protein molecule. A protein's sequence of amino acids determines its three-dimensional structure and function. Soybean proteins have a wide range of functions, including:  

  • Enzymes: These are proteins that cause chemical reactions in the body 
  • Hormones: Proteins that regulate physiological processes 
  • Antibodies: These recognize and bind to foreign substances in the body 
  • Transport proteins: They transport molecules from one location to another 
  • Structural proteins: Proteins that provide support and structure for cells and tissues 

The soybean meal contains all the essential amino acids for human health. Soybeans can be used to meet your daily protein needs. 

Health Benefits of Soybean Proteins  

Soybean proteins have many health benefits. Here are just a few: 

Lower Blood Pressure  

This is the force of blood against the walls of your arteries. High blood pressure can damage your arteries and lead to heart disease. Soybean proteins may help lower blood pressure by reducing the amount of sodium in your diet. 

Improve Bone Health 

Bones are made up of minerals, water, and protein. Soybean proteins may help improve bone health by providing the body with the amino acids needed to build new bone tissue. This is most important for older adults who are at risk for osteoporosis. 

Weight Loss 

Proteins help you feel fuller longer and may aid in weight loss. Soybean proteins are a good choice for people trying to lose weight because they are low in fat and calories. 

Lower Cholesterol  

Anyone can develop high cholesterol, but it's more common in overweight people or diabetes. Soybean may help lower cholesterol by binding to bile acids and helping the body eliminate them from the body. 

Reduced Risk of Cancer 

Although further studies are required, research has shown that soybeans may help reduce the risk of certain cancer types, including breast cancer. This may be due to the presence of isoflavones, compounds that have been shown to have cancer-fighting properties. 

Reduce Inflammation  

This is a natural response of the body to injury or infection. However, chronic inflammation can lead to diseases like heart disease and arthritis. Soybean may help reduce inflammation by inhibiting the production of inflammatory compounds. 

How Many Proteins Are In Soybeans? 

Soybeans are a good source of protein. A single soybean contains about 40% protein by weight. This means that soybeans are higher in protein than most other plant-based foods. For comparison, wheat only has about 12% protein, and rice contains about 11% protein.

Let's look at some examples of how much protein is in soybeans. One cup (186 grams) of cooked soybeans contains 28 grams of protein. This is the equivalent of two chicken breasts or four eggs. A soybean burger patty (85 grams) contains about 11 grams of protein. And one ounce (28 grams) of soybean flour contains about 12 grams of protein. 

The Potential Risks Linked With Consuming Too Much Soybean Protein  

Soybeans are a good source of protein. However, consuming too much soybean protein can lead to some health problems. The main concern with soybeans is their estrogen content. Estrogen plays a crucial role in the development and function of the reproductive system. Too much estrogen can cause problems like endometriosis, uterine fibroids, and breast cancer. 

Soybeans also contain compounds called phytoestrogens. Phytoestrogens are plant-based chemicals that mimic the hormone estrogen. These compounds can bind to estrogen receptors in the body and cause problems like infertility, thyroid problems, and weight gain.

For these reasons, it's essential to limit your soybean intake. Consult your physician or a licensed dietitian if you're concerned about soybeans. They can help you make the best choices for your health.  


As you can see, soybeans are a good source of protein. They contain all the essential amino acids needed to form a complete protein. However, soybeans also contain estrogen and phytoestrogens. As such, it's vital to limit your soybean intake. Talk to your clinician if you're concerned about soybeans and their potential risks.