Nicotinamide Riboside (NR)

The vitamin that reliably raises a number in your blood - and, in most of the trials that mattered, changed almost nothing else.Nicotinamide riboside (NR) is the most-studied NAD+ precursor on the market. Twenty-five human trials, run across a decade, in populations from healthy volunteers to heart failure patients. One finding survives all twenty-five untouched: NR raises blood NAD+, reliably, every time. What that biochemical win does for your blood pressure, your blood sugar, your muscles, your brain, and your lifespan is a much messier story - and most books selling NR won't tell you the messy part. This one does.NAD+ is the coenzyme your cells run on - the currency behind energy production, DNA repair, and the sirtuin proteins tied to the biology of aging itself. NR converts into NAD+ in two enzymatic steps, cheaper and faster than the route your body defaults to. That much is settled biochemistry. Whether raising that number actually fixes anything in a human body is the question twenty-five trials have tried to answer, and it's the question this book walks through, trial by trial, dose by dose.Every claim inside carries a grade: PROVEN, PROMISING, or THEORY. No exceptions, no rounding up. If a claim doesn't earn one of those three tags on the strength of the actual data, it doesn't make the page.Inside, trial by trial: - Blood Pressure: The nine-point blood pressure drop that made headlines - and the exploratory subgroup it actually came from. - Vascular Health: The peripheral artery disease trial where NR moved a real, placebo-controlled walking-distance number. - Cardiovascular Evidence: The failing-heart trial that tested NR in the exact tissue its own biochemistry points to. - Metabolic Impact: The two rigorous trials that tested NR against insulin resistance…