D-Glucose-13C (Standard) is a reference standard of D-Glucose-13C intended for quantitative analysis, quality control, and related biochemical research applications. D-Glucose-13C is D-Glucose labeled with 13C, serving as a marked variant of this essential monosaccharide. D-Glucose (Glucose) is a fundamental carbohydrate in biological systems. It acts as a natural sweetener for carbohydrates, plays a vital role in general metabolism, and functions as a crucial signaling molecule related to cellular metabolic states, as well as biological and abiotic stress responses.