david sinclair glutathione A 'Fountain Of Youth' Pill? Sure, If You're A Mouse Dr. David Sinclair: “Only 10
Description
The 3.0 mL fill gives ~3.33 mg/mL, so 1 unit 33.3 mcg on a U-100 syringe (150 mcg = 4.5 units, 600 mcg = 18 units)

If you've ruled everything else out, this could be the issue

[DOI] [PubMed] [Google Scholar] Tantular IS
These initial studies reported increased NAD + and NAM levels in plasma, and in urine, the excreted NAD + levels increased after 6 h 66 , but it must be noted that these trials utilized small cohorts and short testing periods, and only a minor trend for cognitive improvement was observed 117