In healthy adults aged 60-80, a 250mg daily dose of NR plus pterostilbene reduced diastolic blood pressure and lowered alanine aminotransferase (ALT) levels.

“in an eight week long randomized double-blind placebo-controlled study involving a hundred and twenty healthy adults between the age of sixty and eighty years old a two hundred and fifty milligrams daily dose of nicotinamide right aside and pterostilbene a natural compound found in blueberries that activate sirtuin similar to resveratrol increased participants whole blood nad levels by 40 percent compared to their baseline levels just after four weeks participants whole blood nad levels increased by 90% when taking a double dose which was 500 milligrams”