Extended Data Fig. 1: Clinical study design.

Scheme of the randomized, open-label, placebo-controlled four-arm study and flowchart comparing the acute and chronic effect of NR, NMN and Nam on whole blood NAD+ levels.

Scheme of the randomized, open-label, placebo-controlled four-arm study and flowchart comparing the acute and chronic effect of NR, NMN and Nam on whole blood NAD+ levels.