Liposomal NAD+ supplements use tiny fat bubbles (liposomes) to encapsulate and deliver Nicotinamide Adenine Dinucleotide (NAD+) or its precursors (like NR/NMN) into cells, aiming to boost declining NAD+ levels, crucial for cellular energy (ATP), mitochondrial function, DNA repair, and anti-aging pathways (sirtuins), potentially improving energy, focus, and metabolic health, though some experts question its efficacy over stable precursors like Nicotinamide Riboside (NR) due to processing challenges, advocating for proven precursors.