The Japan Tofu Association is Japan's representative body of all domestic tofu producers.
Rich in amino acids
Soybean protein is good quality protein with all twenty types of amino acids needed in the human body present in comparatively well balanced quantities. Furthermore, the nine essential amino acids that need to be ingested as they cannot be produced in the body are present in abundance.
From “protein” to “amino acid”
Protein is a constituent of cells throughout the body such as muscle and internal organ cells. Enzyme catalysts that cause biochemical reactions within cells to make the body function, peptide hormones that regulate internal functions, neurotransmitters and immunity related agents, etc, are also made from proteins. The proteins that comprise the body are in a continuous process of synthesis and breakdown; the body is never in the same state.
The period of renewal of tissue in the body through metabolism differs depending on the region. The stomach lining has a short renewal period of about two to three days, while other regions can take up to two years. The average overall renewal period is about seventy to eighty days.
Proteins that are lost in the breakdown process are replenished through food. In the stomach, proteins contained in foods are broken down into their amino acid constituents. They are then absorbed through the small intestines into the blood and carried to the liver. Once here, the amino acids are synthesized into the many different protein types needed by the body. Proteins are high polymer compounds comprised of many hundreds to many thousands of chained amino acids.
This breakdown/synthesis mechanism is the reason why the proteins our bodies need can be produced from ingested plant and animal proteins.
The efficiency with which the body can produce proteins differs according to the types of proteins contained in ingested foods, and this is determined by the types and quantities of amino acids present. Consequently, it is important to ingest proteins with the required constituent amino acids every day.
Although there are twenty amino acids that the body needs, nine of these cannot be produced by the body and must be ingested. These are called “Essential Amino Acids”.