Typical 800-MHz 1H NMR spectrum of human whole blood extract with expanded regions labeled with characteristic peaks of coenzymes: oxidized nicotinamide adenine dinucleotide (NAD+), oxidized nicotinamide adenine dinucleotide phosphate (NADP+), reduced nicotinamide adenine dinucleotide (NADH), reduced nicotinamide adenine dinucleotide phosphate (NADPH), adenosine triphosphate (ATP), adenosine diphosphate (ADP) and adenosine monophosphate (AMP), and antioxidant: oxidized glutathione (GSSG)