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
Short courses. Long-term megadosing has no demonstrated benefit.
Who it's actually for
Low produce intake, smokers, and recovery from illness or surgery.
Safe upper limit
Reported2,000 mg per day
Above this, diarrhoea is common and kidney stone risk rises in susceptible people.
Standard figure, high confidence, not re-verified against the live fact sheet this session.
Interactions to know about
- Chemotherapy / cancer treatment — Any active oncology treatment
Other supplements:
Run your full list through the interaction check.
Practical notes
- Splitting doses beats one large one — absorption saturates.
- Takes iron absorption up substantially, which is useful or unwanted depending on your situation.