Understand the source comparison
Glutathione Dosage Forms: Effectiveness Comparison
Standard Oral Reduced GSH <10% 500–1,000mg Low cost, widely available Destroyed by gastric acid and proteases before absorption Not recommended. Evidence shows negligible systemic uptake Liposomal Glutathione 60–90% 250–1,000mg High cellular uptake, phospholip
No winner is assigned.
This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- Standard Oral Reduced GSH
- <10%
- 500–1,000mg
- Low cost, widely available
- Destroyed by gastric acid and proteases before absorption
- Not recommended. Evidence shows negligible systemic uptake
- Liposomal Glutathione
- 60–90%
- 250–1,000mg
- High cellular uptake, phospholipid protection from enzymes
- Higher cost, requires refrigeration after opening
- Gold standard for oral supplementation. Clinical evidence strongest
- Acetylated Glutathione (S-acetyl-GSH)
- 40–60%
- 300–600mg
- Stable at room temperature, acetyl group protects thiol from oxidation
- Requires intracellular deacetylation, slightly lower peak levels than liposomal
- Excellent alternative when refrigeration isn't feasible
- Sublingual Reduced GSH
- 30–50%
- 100–500mg
- Bypasses GI tract, rapid onset (10–15 min)
- Limited mucosal absorption area, unpleasant taste
- Useful for acute dosing but not ideal for sustained elevation
- Intravenous GSH
- 100%
- 1,400–2,800mg per infusion
- Immediate systemic delivery, no GI degradation
- Clinical administration required, short plasma half-life (2–3 hours)
- Reserved for clinical conditions where oral forms prove insufficient
- N-Acetylcysteine (Precursor)
- N/A (endogenous synthesis)
- 600–1,200mg
- Supports long-term endogenous GSH production, no feedback suppression
- Requires functional synthesis enzymes, slower onset than direct GSH
- Best for chronic support. Combine with direct GSH for acute needs