Glutathione — Peptide Dosing Protocols reference
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Glutathione Protocol Guide | Peptide Dosing Protocols Shop Protocols Stacks A–Z Index Email Updates Home Protocols Glutathione Protocol Guide - Dosing Context, Routes & Safety Protocol / Research Dosing Guide Glutathione Protocol Guide - Dosing Context, Routes & Safety A plain-English research reference on glutathione: what it is, how it has been dosed by route in human studies, reconstitution and supplies for injectable use, side effects, and where the evidence stops. By Garret Grant · Founder & Lead Researcher · Last reviewed June 2026 · Share Supplier Pick Copy code PEPPAL Copy code PEPPAL Product-Specific Link Verified Supplier Ion Peptide Glutathione View Ion Peptide Table of Contents View Supplies Quick Start Dosing Context Supplies Needed Reconstitution Guide How It Works Who Should Avoid Side Effects & Safety Timeline & Monitoring Clinical Evidence Storage & Handling Troubleshooting Regulatory Status Comparisons Related Protocols FAQ References Glutathione Quick Start Glutathione (often written GSH) is the most abundant antioxidant your body makes on its own. It is a small protein-like molecule called a tripeptide, built from three amino acids: cysteine, glycine, and glutamate.
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Linked assets (8) · phenotypes (0)
evidence_reference, dosing_reference, safety_reference, monitoring_reference, mechanism
Findings (98) · awaiting review (78)
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A 2017 pilot study gave 300 mg/day oral glutathione to NAFLD patients for four months and saw liver enzyme (ALT) levels fall, and a 2025 review of three small trials found similar improvements.
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Skin-lightening RCTs frequently used 500 mg/day for 4-12 weeks.
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The 2015 body-store RCT used 250 mg/day and 1,000 mg/day for six months.
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In Mischley and colleagues' trials, participants used 100-200 mg three times daily (300-600 mg/day total) as a nasal spray for three months.
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Glutathione Protocol Guide | Peptide Dosing Protocols Shop Protocols Stacks A–Z Index Email Updates Home Protocols Glutathione Protocol Guide - Dosing Context, Routes & Safety Protocol / Research Dosing Guide Glutathione Protocol Guide - Dosing Context, Routes & Safety A plain-English research reference on glutathione: what it is, how it has been dosed by route in human studies, reconstitution and supplies for injectable use, side effects, and where the evidence stops.
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By Garret Grant · Founder & Lead Researcher · Last reviewed June 2026 · Share Supplier Pick Copy code PEPPAL Copy code PEPPAL Product-Specific Link Verified Supplier Ion Peptide Glutathione View Ion Peptide Table of Contents View Supplies Quick Start Dosing Context Supplies Needed Reconstitution Guide How It Works Who Should Avoid Side Effects & Safety Timeline & Monitoring Clinical Evidence Storage & Handling Troubleshooting Regulatory Status Comparisons Related Protocols FAQ References Glutathione Quick Start Glutathione (often written GSH) is the most abundant antioxidant your body makes on its own.
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Oral dosing context Human trials have used 250-1,000 mg/day orally.
safety · pending
IV is different IV is not FDA-approved for skin lightening and carries real safety risks.
regulatory · pending
Not an FDA-approved drug for these uses.
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Educational research reference This page summarizes how glutathione has been studied and dosed in research and clinical settings.
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Glutathione Dosing Protocol & Context There is no single official glutathione dose, because it is not an FDA-approved drug for the uses people search for.
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What follows is dosing context from published human studies , not a recommendation.
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The single most important thing to understand before any dose talk: studies disagree on whether standard oral glutathione even reaches your bloodstream in a u
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In a 2015 six-month RCT, Richie and colleagues reported that 250 mg/day and 1,000 mg/day raised glutathione in blood, red cells, and other tissues.
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But a 2011 RCT by Allen and Bradley gave 500 mg twice daily for four weeks and found no change in glutathione status or oxidative-stress markers.
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A 1992 study gave a single 3 g dose to seven people and saw no rise in blood levels.
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Glutathione Dosing Context by Route Choose the route to see the dosing context reported in human studies.
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None of this is a personal dosing recommendation.
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Oral human trials have most often used 250 mg to 1,000 mg per day , sometimes split into two doses.
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Important honesty point: in the 2017 Phase IIb trial, the high-dose group improved on the Parkinson's rating scale versus their own baseline, but neither dose beat placebo — the placebo group also improved.
safety · pending
So intranasal glutathione looked safe and tolerable, but it did not clearly outperform a saline spray over three months.
regulatory · pending
Not FDA-approved cosmetically.
safety · pending
IV glutathione is given in clinics, not at home, and is the route tied to the most safety problems.
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Cosmetic skin-lightening clinics have used roughly 600-1,200 mg per session, once or twice weekly , sometimes with vitamin C.
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In one IV skin-lightening RCT (Zubair), 1,200 mg twice weekly for six weeks produced modest short-term lightening that faded within six months.
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This is not a how-to IV and injectable glutathione for skin lightening is not FDA-approved.
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The US FDA issued a June 2019 alert after seven patients had adverse reactions from a compounded glutathione injection contaminated with e
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The FDA Philippines warned of liver, kidney, and nervous-system toxicity and Stevens-Johnson Syndrome risk.
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Glutathione dosing context by route (from human studies, not a recommendation) Route Oral capsule Studied range 250-1,000 mg/day Typical study length 4 weeks - 6 months Evidence note RCTs conflict on whether it raises body stores Route Liposomal / sublingual Studied range ~300-500 mg/day Typical study length 1-4 weeks (PK studies) Evidence note Small studies suggest better absorption Route Intranasal Studied range 300-600 mg/day split x3 Typical study length 3 months Evidence note Safe in PD trials; did not beat placebo Route IV (clinic) Studied range 600-1,200 mg/session Typical study length Weekly x6 weeks Evidence note Not FDA-approved cosmetically; safety concerns Route Studied range Typical study length Evidence note Oral capsule 250-1,000 mg/day 4 weeks - 6 months RCTs conflict on whether it raises body stores Liposomal / sublingual ~300-500 mg/day 1-4 weeks (PK studies) Small studies suggest better absorption Intranasal 300-600 mg/day split x3 3 months Safe in PD trials; did not beat placebo IV (clinic) 600-1,200 mg/session Weekly x6 weeks Not FDA-approved cosmetically; safety concerns Ranges describe what researchers used.
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They are not dosing instructions.
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This is not a dosing recommendation.
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ione dosing in the wild is community-derived or clinic-marketing-derived, not standardized by regulators.
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Whether oral glutathione meaningfully changes health outcomes (beyond pigmentation in some trials) remains unproven in large studies.
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mg/day research-context plan from a 1,200 mg vial.
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Cycle length Planning note 4 weeks 14 vials ~28 x 600 mg doses; 2 doses per 1,200 mg vial 6 weeks 21 vials ~42 doses needed 4 weeks 14 vials ~28 x 600 mg doses; 2 doses per 1,200 mg vial 6 weeks 21 vials ~42 doses needed Bacteriostatic Water Only if reconstituting a lyophilized research vial.
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A 2025 review pooled three small trials (109 people total) and found consistent ALT and oxidative-stress improvements.
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Cycle length Planning note 4 weeks 1 x 30 mL bottle Volume depends on vial size and target concentration 4 weeks 1 x 30 mL bottle Volume depends on vial size and target concentration Round up for priming losses and handling.
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Example: a 1,200 mg vial reconstituted with 3.0 mL of bacteriostatic water gives 400 mg/mL.
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A 0.10 mL draw (10 units on a U-100 syringe) would then deliver 40 mg.
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In doing so it becomes oxidized (GSSG), then an enzyme called glutathione reductase recycles it back to the active reduced form (GSH).
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