Role in the Body Energy Production: NAD+ works inside your cell batteries (mitochondria) to convert nutrients into usable energy (ATP). Cell Repair: It activates special proteins called sirtuins and PARPs that fix damaged genes and manage stress. Aging: Your natural NAD+ levels drop as you get older, which can lead to lower energy and slower recovery. [1, 2, 3] Ways to Boost NAD+ Oral Precursors: Supplements like NMN or NR give your body the building blocks to make more NAD+ naturally. IV and Injections: Direct delivery methods are popular for fatigue and brain fog, though they are costly and lack…