# Glutathione

> Glutathione is a naturally occurring tripeptide composed of glutamine, cysteine, and glycine, produced endogenously in nearly all human cells and recognized as one of the body's principal intracellular antioxidants. It is used clinically in some countries for oxidative-stress-related conditions and is widely discussed in wellness contexts for detoxification and immune support. Endogenous glutathione levels are known to decline with age and chronic disease, which has driven research interest in supplementation. Oral bioavailability is poor, which is why injectable forms are commonly used when higher systemic levels are desired.

- URL: https://www.lifeconverted.com/peptides/glutathione
- Primary category: Immune & Anti-Aging
- Effectiveness rank: #11 in Immune & Anti-Aging; #3 in Metabolic
- Evidence level: Well studied
- Route: Intravenous (Most commonly administered intravenously in clinical settings; subcutaneous and intramuscular administration are also used, though absorption and comparative efficacy data for non-IV routes are limited.)
- Dose range: 200-1,200 mg
- Dose tiers: low 200 mg; moderate 600 mg; high 1200 mg
- Half-life: Very short in plasma, on the order of minutes, due to rapid cellular uptake and recycling
- Timing: Morning
- Cycle: 4-8 weeks on, 2-4 weeks off (Often used continuously in clinical antioxidant-support protocols; cycling is more common in non-clinical wellness use)
- Storage: Store lyophilized or liquid glutathione refrigerated and protected from light; use reconstituted solution promptly due to oxidation sensitivity

## Mechanism of action

Glutathione neutralizes reactive oxygen species and free radicals directly and serves as a cofactor for glutathione peroxidase, an enzyme central to cellular antioxidant defense. It also participates in phase II liver detoxification by conjugating with and helping eliminate certain toxins and xenobiotics. Additionally, glutathione supports immune cell function, including lymphocyte proliferation, though direct causal human immune-outcome data are limited.

## Reported benefits

- May support antioxidant defense against oxidative stress
- Studied for a role in liver detoxification pathways
- Explored for potential immune function support
- Sometimes used for skin-brightening effects in cosmetic contexts
- May support recovery from oxidative stress associated with illness or exertion

## Reported side effects

- Nausea or abdominal cramping, particularly with IV administration
- Injection site discomfort
- Rare allergic reactions
- Theoretical risk of unmonitored heavy metal redistribution during high-dose detox protocols

## Common protocols

- Weekly or twice-weekly IV push
- Subcutaneous injection as a lower-intensity alternative
- Combined with vitamin C infusion in some clinical settings

## Stacking notes

Frequently paired with vitamin C, which may help regenerate oxidized glutathione; also discussed alongside NAD+ protocols

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Educational information only, not medical advice. Full disclaimer: https://www.lifeconverted.com/disclaimer