Amino acids are often described as the building blocks of life. All body tissues are not only made up of amino acids, but actually, the character of the tissue in the body depends on how the amino acids are put together. In other words, the reason hair is different from skin, is because the amino acids which are strung in a chain called protein are different. Skin protein is different from hair protein which is different than the proteins that make up our blood, but they are all made from the same 20 or so amino acids, just strung together in different sequences to make different proteins. The analogy is to words (like proteins), which come in 10s of thousands of possibilities, but they are all made from the same 26 letters (like amino acids).Deficiencies and sometimes excesses of amino acids found on amino acid testing are associated with a wide array of medical and psychological problems, depending on which ones are out of range. For instance, if the amino acid tryptophan is deficient, serotonin and melatonin, which are neurotransmitters made from tryptophan, may become deficient. Deficiencies in serotonin have been associated with mood swings, irritability and difficulty with a letting go of resentments Deficiencies in melatonin have been associated with sleep problems.
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