Optimal doses of NAC as a supplement have not been set for any condition. Quality and active ingredients in supplements may vary widely from maker to maker. This makes it very hard to set a standard dose.
There are standard doses for prescription uses of NAC. These depend on the condition that is being treated. Ask your doctor for advice.
Can you get NAC naturally from foods?
NAC cannot be found in foods.
What are the risks?
Tell your doctor about any supplements you're taking, even if they're natural. That way, your doctor can check on any potential side effects or interactions with medications.
Interactions. If you take any medicines regularly, talk to your doctor before you start using NAC supplements. They could interact with nitroglycerin or other medications.
The U.S. Food and Drug Administration (FDA) does regulate dietary supplements; however, it treats them like foods rather than medications. Unlike drug manufacturers, the makers of supplements don’t have to show their products are safe or effective before selling them on the market.