Research Insight Recent research is reshaping how scientists think about NAD⁺ inside our cells.Rather than existing as a single, uniform pool, NAD⁺ is now understood to be regulated separately across different parts of the cell — each with its own demands. Within this evolving picture, NMN continues to be studied as a key precursor that supplies NAD⁺ to the body, as researchers explore how cellular balance is maintained over time. Why This New Perspective Matters For many yea