β-Nicotinamide mononucleotide is a nucleotide derived from ribose, nicotinamide, and phosphate. It serves as a precursor to nicotinamide adenine dinucleotide (NAD+), a vital molecule that is essential for energy metabolism, DNA repair, and cell signaling. As we age, NAD+ levels in our bodies naturally decline, leading to decreased cellular function and increased susceptibility to age-related diseases. This decline has made the study of NMN particularly exciting, as it has the potential to boost NAD+ levels and rejuvenate cellular functions.