L-Glutathione · Reduced Glutathione · GSH
Glutathione (GSH) is a tripeptide (gamma-glutamyl-cysteinyl-glycine) that serves as the body's master antioxidant, present in every cell at millimolar concentrations. It plays central roles in detoxification (Phase II conjugation in the liver), antioxidant defense (neutralizing ROS and regenerating vitamins C and E), immune function (lymphocyte proliferation and NK cell activity), and cellular redox homeostasis. Glutathione exists in reduced (GSH, active) and oxidized (GSSG, inactive) forms; the GSH:GSSG ratio is a key indicator of cellular health. Injectable glutathione (IM or IV) bypasses the poor oral bioavailability of the intact tripeptide and directly replenishes cellular pools. The thiol (sulfhydryl) group on cysteine is the chemically active site responsible for both its antioxidant function and its oxidation sensitivity.
IM or IV. Any time. Often combined with NAD+ in IV protocols. Pin alone for IM.
Start here. Every protocol below is ordered lowest-first. Begin at the smallest effective dose, hold about a week to assess tolerance, and step up only if needed.
Glutathione's cysteine thiol group (-SH) donates electrons to neutralize reactive oxygen species (ROS), peroxides, and free radicals, becoming oxidized to GSSG in the process. Glutathione reductase (using NADPH) recycles GSSG back to GSH, maintaining the antioxidant pool. In hepatic detoxification, glutathione S-transferases conjugate GSH to xenobiotics, drugs, and toxins, making them water-soluble for excretion. Glutathione also regenerates oxidized vitamin C and vitamin E back to their active forms, serving as the hub of the antioxidant recycling network. In immune function, adequate GSH is required for lymphocyte proliferation, NK cell cytotoxicity, and T-cell function. GSH also inhibits melanin synthesis by switching melanogenesis from eumelanin (dark) to pheomelanin (light), producing skin brightening effects.
Days 1-14: Minimal visible changes. Cellular GSH levels begin to restore.
Weeks 2-6: Skin complexion improvements may begin. Immune function enhancement. General well-being improvement.
Weeks 6-12: Cumulative skin brightening. Detoxification capacity optimized. Best assessed through GSH:GSSG ratio testing if available.
Each reference below was re-fetched from its PubMed record, and the quoted sentence was confirmed to appear in that abstract and to support the claim it sits under. Follow any of them to read the source.
Evidence boundary from the checked abstract: Glutathione exists in two states-oxidized and reduced.
Glutathione exists in two states-oxidized and reduced.
Glutathione in Brain Disorders and Aging.
Evidence scope. This entry supports only the exact statement quoted from the live abstract; it does not independently verify OnePin's displayed dose, route, frequency, formulation, population, or broader mechanism.
Claims we could not support
No abstract we checked supports these for this molecule at this route. That is not the same as saying they are false — it marks where the evidence is missing.
Dose/route: 200-400 mg IM; IM injection (not SubQ due to potential irritation); 2-3 times weekly. No checked live PubMed abstract verified this exact displayed dose, route, and frequency for the same molecule/formulation and relevant population.
Primary safety claim: No primary safety text present in source JSON. No checked live PubMed abstract directly verified this source-JSON safety claim at the displayed formulation, route, and regimen.
Master antioxidant
Definitively established. Glutathione is the most abundant intracellular antioxidant in human biology. Central to the antioxidant recycling network.
Confirmed mechanism (eumelanin to pheomelanin shift). Multiple studies show reduction in melanin index. Popular in Asian beauty markets.
Phase II conjugation is a fundamental liver detox pathway. Glutathione conjugation is used clinically (NAC for acetaminophen overdose).
Two different questions: what is documented about running these together, and what is documented about drawing them into the same syringe. A good pharmacological partner can still have to be pinned separately.
Check any specific pair in the Stack & Interaction Checker, which answers both questions separately. Absence of a documented conflict is not evidence of safety.
IM
Enzymatic degradation (gamma-glutamyltranspeptidase and dipeptidases)
Storage. CRITICAL: Thiol group degrades to GSSG (oxidized, inactive form). Use within 14-21 days of reconstitution. Protect from light and air exposure at all times. Refrigerate 2-8C. Solution should be clear and colorless; discard if yellow or brown. Minimize air introduction during draws. Unreconstituted powder more stable (store frozen -20C).
Available through compounding pharmacies and as IV clinic formulations. Not FDA-approved as an injectable drug for any specific indication. NAC (glutathione precursor) is FDA-approved for acetaminophen overdose. No WADA prohibition.
Put it to work
Open Glutathione straight into OnePin with your vial and dose pre-filled, then let it handle the syringe math and remind you before the vial runs out.
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