Nour-Eddine Ziraoui et al. 2026. Clinical Evaluation of a Time-Sequential Biphasic NMN–Resveratrol–Quercetin–Piperine NAD+ Supplement Targeting SIRT1 (BCLC™). Frontiers in Sustainable Development. 6, 4 (Apr. 2026), 1–9. DOI:https://doi.org/10.54691/7pt02z87.