I'm taking rapamycin (5mg/wk), niacin (1g/day), and dried parsley (1/2 cup/day). Dried parsley contains a lot of apigenin. Apigenin blocks CD38. CD38 blocks NAD+. Blocking NAD+'s blocker and adding niacin should raise NAD+ levels without NMN. I'm taking this all at the same time. I'll let you know how it turns out. I started this last week.
See Dr. Brad Stanfield's video on apigenin: https://www.youtube.com/watch?v=MiU_dh9jjNA