In the 2026 landscape of functional ingredients, glycine is quietly transforming from a basic chemical to a high-value-added health component. As the simplest amino acid in structure, glycine not only undertakes core physiological functions such as protein synthesis, neurotransmitter regulation, and collagen building, but also demonstrates strong application potential in niche areas such as sleep improvement, liver protection, joint health, and intestinal repair. With consumers' increasing demand for "precision nutrition" and "gentle efficacy," glycine is occupying a more important position in functional foods, sports supplements, and oral beauty products. Industry research shows that the demand for pharmaceutical-grade and food-grade glycine is growing significantly, and the global market size is expected to maintain steady growth over the next three years.