TRU NIAGEN Patented NAD Supplement for Brain Function, Anti Aging & Cell Regeneration, 300mg Niagen, 90 Servings | Supports Cellular Energy, Muscle | Nicotinamide Riboside (NR) Take 1 Daily | 1 Bottle

Customers report positive effects on energy, stamina, and mental clarity, with one noting increased focus. The supplement promotes cellular health by increasing NAD and helps with restful sleep and reduced fatigue in the afternoons. While some customers find it worth the price, others consider it expensive, and experiences with side effects are mixed, with some reporting stomach pains and headaches.