PK+ amino acid products contain amino acids enriched with organic potassium, organic acids and prebiotic, that enhance the amount and speed of amino acid absorption, which is a distinct feature from other common amino acids. Organic acids improve the integrity of the intestine, increase the proliferation of intestinal epithelial cells and the height of the villi, and as a result, enhance the absorption level of the gastrointestinal tract and increase the absorption of nutrients such as amino acids.