Interest in NAD+ injections has grown rapidly as more people look for evidence-based ways to support energy, cognitive function, and healthy aging. Along with that interest comes an important and reasonable question: are NAD+ injections safe? The answer is not a simple yes or no. Like most medical and wellness interventions, safety depends on how NAD+ is used, who it is used for, and whether it is administered responsibly. Understanding what NAD+ is, how it functions in the b