What is NAD in medical terms in bloods?

NAD in medical terms often refers to "nicotinamide adenine dinucleotide," a coenzyme found in all living cells that plays a crucial role in metabolism. It exists in two forms, NAD+ and NADH, and is essential for cellular processes such as energy production and redox reactions. In blood tests, NAD levels can provide insights into metabolic health and may be relevant in conditions like Diabetes or certain mitochondrial disorders. However, NAD levels are not commonly measured directly in routine blood tests.