While obvious to some, many consumers often wonder whether the supplement they’re taking is positively impacting them. If the latter is you, you might find the following useful. During an appearance on “The Story of a Brand” podcast, Chromadex (sellers of NR) CEO Rob Fried had some advice for those taking vitamin supplement Nicotinamide Riboside “NR” (FAQs) (Anecdotes) and wondering if it’s working: