N-Acetyl Cysteine (NAC) for Inflammatory Bowel Disease (IBD) — General
DPilot data only. Glutathione precursor may reduce oxidative stress in IBD. Requires larger clinical trials.
The Bottom Line
Pilot data only. Glutathione precursor may reduce oxidative stress in IBD. Requires larger clinical trials.
Key Study Findings
Population: Review of nanocatalytic antioxidation in diseases
Population: IBD patients with thiopurine-induced liver injury
Population: IBD patients (Crohn's and UC)
Population: Mice
Population: Patients with IBD
Population: IBD patients (mechanistic review)
Key Statistics
1
Studies
30
Participants
Positive
Grade
Referenced Papers
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
Commonly Used Dosages
- general:
- 600-1,200 mg/day in divided doses
- hpyloriadjunct:
- 600 mg twice daily alongside standard triple therapy
- antioxidantsupport:
- 600-900 mg/day
Upper limit: Generally well-tolerated up to 1,800 mg/day; higher doses used in clinical settings
Dosages Studied in Research
| Dosage | Duration | Effect | N |
|---|---|---|---|
| None | -- | Mixed | -- |
| N-acetylcysteine with thiopurine | 16 weeks | Positive | -- |
| None | -- | Positive | -- |
| 150 mg/kg | 4.3 weeks | Positive | -- |
| 400 IU/day | 52 weeks | Mixed | -- |
| None | -- | Neutral | -- |
| Various antioxidant compounds | -- | Positive | -- |
| None | -- | Mixed | -- |
Best taken: With or without food; divide doses throughout the day
Safety & Side Effects
Reported Side Effects
- ⚠ Nausea and vomiting (most common, especially at higher doses)
- ⚠ Diarrhea
- ⚠ Unpleasant sulfur taste/odor
- ⚠ Headache
Known Interactions
- ● Nitroglycerin (NAC may enhance vasodilatory effects; risk of hypotension)
- ● Activated charcoal (may reduce NAC absorption)
- ● Anticoagulants (NAC may have mild antiplatelet effects)
- ● ACE inhibitors (additive hypotensive effect with nitroglycerin combination)
Tolerable upper intake: Generally well-tolerated up to 1,800 mg/day; higher doses used in clinical settings
Always consult your healthcare provider before starting any supplement.
Frequently Asked Questions
Does N-Acetyl Cysteine (NAC) help with Inflammatory Bowel Disease (IBD) — General?
How much N-Acetyl Cysteine (NAC) should I take for Inflammatory Bowel Disease (IBD) — General?
Are there side effects of N-Acetyl Cysteine (NAC)?
How strong is the evidence for N-Acetyl Cysteine (NAC) and Inflammatory Bowel Disease (IBD) — General?
Related Evidence
Other ingredients for Inflammatory Bowel Disease (IBD) — General
N-Acetyl Cysteine (NAC) for other conditions
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.