This article explains how NAD+ supports metabolism by helping the body convert food into usable energy and regulate fat and glucose usage. It describes how declining NAD+ levels may contribute to slower metabolism, fatigue, and difficulty with weight management or insulin sensitivity. The article also highlights NAD+ IV therapy as a way to restore cellular energy function and improve metabolic performance. It notes that many people report increased energy, reduced fatigue, better appetite control, and potential support for weight management after treatment.