Karnozīnu organisms dabiski ražo aknās no beta-alanīna un histidīna.
Beta-alanine is a non-essential amino acid that is produced naturally in the body.
HIS is obtained from the diet mainly in the form of proteins. Its content in proteins of animal sources, like meat, chicken, and fishes, is 25–30 mg/g, and in plant proteins, like soybean, kidney beans, peas, oat, and wheat, is 20–30 mg/g

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