NAD+: NAD+ (Nicotinamide Adenine Dinucleotide) is not a peptide but a vital molecule for cellular energy production, DNA repair, and longevity. It is involved in many metabolic processes and helps reduce oxidative stress, repair cells, and improve brain and heart health. As we age, NAD+ levels decline, so supplementation can help delay aging symptoms, improve energy levels, and enhance cognitive and physical performance.