The important core structure of human milk oligosaccharides (HMOs) is composed of galactose, N-acetylglucosamine, and glucose. It has prebiotic effects, immune regulatory effects, anti-inflammatory effects, intestinal cell response regulatory effects, antibacterial activity, and antiviral activity. In the United States and the European Union, LNT has been approved for use in various foods and beverages such as infant formula, beverages, and dairy products. In addition, the EU can also apply LNT to dietary supplements, formula foods for special medical purposes, and milk based beverages or similar products intended solely for young children.