Oral Glutathione Supplement Dose Safety
A specific safety threshold for oral glutathione at 1200 mg/day is not established in the available clinical evidence. [1]
In a 6-month randomized, double-blind, placebo-controlled trial in non-smoking adults, oral glutathione was studied at 250 mg/day and 1000 mg/day. [1]
Because 1200 mg/day exceeds the highest studied oral dose (1000 mg/day) in that trial, safety at 1200 mg/day is not directly supported by that evidence. [1]
Evidence for Oral Glutathione Dosing
- A randomized controlled trial evaluated oral glutathione at 250 mg/day and 1000 mg/day for 6 months. [1]
Route-Specific Safety Considerations
- Safety concerns exist for injected glutathione preparations when compounded for injection. [2]
General Supplement Safety Principles
- Dietary supplements are not approved the same way as drugs, and product variability can occur. [3]
Practical Clinical Guidance on Dose Decisions
- A clinician should be consulted when considering dosing above 1000 mg/day, because direct safety evidence at 1200 mg/day is not established. [1], [3]
Common Pitfalls to Avoid
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Use of higher-than-studied doses without established safety data is a common source of avoidable risk. [1]
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Using glutathione preparations intended for injection outside appropriate medical supervision is associated with safety concerns. [2]
Monitoring After Starting a Supplement
- Adverse events should be reported to the prescribing clinician promptly if they occur, due to limited safety characterization for many supplement regimens. [3]