Check before you startThis one has documented interactions with medication classes where the consequences are serious. If you take any prescription medicine, run it past a pharmacist before starting.
How long to take it
Unknown. There is no established course because there is no established benefit.
Who it's actually for
People comfortable funding an experiment on themselves.
Safe upper limit
UnverifiedNo formal limit; 250–1,000 mg daily in trials
Short-term safety looks acceptable. Long-term data does not exist. Regulatory status is in flux.
No source attached yet. Treat this as a starting point, not a citation, until reviewed.
Interactions to know about
- Chemotherapy / cancer treatment — Any active oncology treatment
Other supplements:
Run your full list through the interaction check.
Practical notes
- Raising NAD levels is well demonstrated; translating that into health outcomes is not.
- Price per gram varies enormously for identical compounds.