NAC vs TUDCA
A side-by-side research comparison of NAC and TUDCA across mechanism, dosing, half-life, benefits, side effects and research status.
Comparison table
| Attribute | NAC | TUDCA |
|---|---|---|
| Full name | N-Acetyl Cysteine | Tauroursodeoxycholic Acid |
| Category | Detox & Antioxidant | Detox & Antioxidant |
| Status | Dietary supplement / FDA-approved (Mucomyst) | OTC supplement / Investigational |
| Mechanism | Provides cysteine for glutathione synthesis (rate-limiting step). Directly scavenges free radicals via sulfhydryl group. Chelates mercury, lead, and arsenic. Modulates glutamate via system Xc- transporter for neuropsychiatric effects. | Acts as a chemical chaperone that reduces endoplasmic reticulum (ER) stress, inhibits apoptosis, protects mitochondria, improves bile flow and solubility, and provides neuroprotective and cytoprotective effects. |
| Molecular weight | 163.19 Da | 571.81 Da |
| Half-life | ~5.6 hours | Variable (enterohepatic recirculation) |
| Bioavailability | ~6-10% oral (poor but effective due to GSH replenishment) | Moderate oral |
| Typical dose | 600-1800 mg | 250-500 mg per day |
| Frequency | 1-2x daily | 1-2x daily |
| Route | Oral capsule or IV (hospital) | Oral capsule |
NAC reported benefits
- Glutathione replenishment
- Liver protection (acetaminophen, alcohol)
- Heavy metal chelation
- Mucus thinning (respiratory)
- OCD/addiction support
- Anti-inflammatory
TUDCA reported benefits
- Liver protection and enzyme normalization
- Improved bile flow
- Reduced ER stress
- Mitochondrial protection
- Neuroprotective potential
- Gut barrier support
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Research and educational reference only. Not medical advice.