This HO-CO pathway has been recently proposed to be involved in the defence against oxidative stress and the deleterious effects of NO, since it removes the cytotoxic free heme, and produces some molecules with antioxidant and anti-inflammatory effects, such as biliverdin and CO [8, 3840]
Supplement companies originally tried using niacin (which we've added below) as well as "NR" (nicotinamide riboside) to increase NAD+, but it turns out that NR is converted to NMN anyway, [46,52] making it costly and more wasteful
Protein has to be prioritized deliberately
the mitochondrial multienzyme complexes of 2-oxo acids, i.e., of pyruvate dehydrogenase (PDH), 2-oxoglutarate dehydrogenase (OGDH), 2-oxoadipate dehydrogenase (OADH) and branched chain 2-oxo acid dehydrogenase (BCODH), linked to amino acids through their transamination to the 2-oxo acids
An aliquot of 0.1 mL of the stock solution was given per 100 g BW using oral gavage on alternate days for 8 weeks
That's how you'll get the results you're looking for