The human body depends on amino acids. They are the body's main architects in building proteins needed for cellular processes. Only 10 of the 20 amino acids required by the body for survival are produced internally. The remaining 10, called essential amino acids, must be found in food sources. The slightest deficiency in these amino acids contributes to bodily "degradation," according to the University of Arizona. Peanut butter is an excellent source of amino acids, offering physiological support in the form of a tasty, nutty food staple.
Isoleucine
Isoleucine, an essential amino acid, is responsible for the creation of hemoglobin, the oxygen carrier in the protein of red blood cells. Research published in the "Journal of Nutrition" indicated that isoleucine plays a role in regulating blood sugar levels. It increases skeletal glucose uptake, a process generally associated with exercise. The study described a 73 percent uptake of glucose in the muscles of food-deprived subjects who were given isoleucine. A cup of salt-free smooth peanut butter contains the recommended daily amount of isoleucine, according to NutritionData.com.
Tryptophan
Tryptophan plays an indirect role in pain perception, sleep and blood pressure because it helps create the neurotransmitters serotonin and melatonin, according to the PeptideGuide.com. The National Institutes of Health concurs, and adds that tryptophan is an essential amino acid needed for the healthy, normal growth of infants and for maintaining nitrogen levels in adults.
Leucine
The daily to-do list of leucine includes protein synthesis, blood sugar regulation, and muscle and tissue repair. Researchers at the University of Illinois have also found that leucine plays a significant role in metabolism "beyond the fundamental role of amino acids" that is directly linked to weight loss. According to PeptideGuide.com, leucine also plays a vital role in protecting muscle proteins from breaking down after stress or trauma.
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