Proteins are broken down into amino acids and then deaminated to form glucose and urea. The liver helps to regulate the amount of amino acid in the body. Unlike glucose and fatty acids, amino acids cannot be stored in the body. The excess of amino acids (from meat or soya bean etc) is deaminated in the Liver into glucose and Urea. Glucose will be stored in the body and Urea will be excreted through urine from the body.