Used in research settings to measure NADH (reduced form of nicotinamide adenine dinucleotide) levels in biological samples. Helps assess cellular redox status, mitochondrial function, and metabolic activity in cells and tissues. Commonly applied in studies related to aging, neurodegenerative diseases, diabetes, and cancer metabolism. Enables quantitative analysis in cell lysates, tissue homogenates, and cultured cells. Supports high-throughput screening in drug development and metabolic research.