DL-Glutamic acid is the conjugate acid of glutamic acid and serves as a fundamental metabolite in biological systems. As a racemic mixture, it consists of equal parts D-glutamic acid and L-glutamic acid. Regarding physical properties, DL-glutamic acid exhibits superior physicochemical stability compared to the alpha and beta polymorphs of L-glutamic acid. It is widely utilized in biochemical research as a buffering agent, a substrate for nutritional studies, and a model for investigating the impact of chirality on the structural and phase-transition behavior of amino acids.

Stevioside (Standard) is the analytical standard of Stevioside, primarily used for research and quantitative analysis. Stevioside is an orally active natural sweetener isolated from Stevia rebaudiana. Stevioside exhibits a broad spectrum of pharmacological activities, including antihypertensive, hypoglycemic, antioxidant, anti-inflammatory, and anti-tumor properties. It is widely utilized in studies concerning metabolic disorders and natural product pharmacology.

Rebaudioside A (Standard) is the analytical standard of Rebaudioside A, primarily used for quantitative analysis and metabolic research. Rebaudioside A (Reb A) is a natural diterpene glycoside extracted from Stevia rebaudiana that exhibits significant anti-hyperglycemic activity as an α-glucosidase inhibitor, with an IC50 of 35.01 μg/mL.