Glutathione

Glutathione is a tripeptide antioxidant composed of glutamate, cysteine, and glycine that neutralizes free radicals, supports detoxification, and protects cells from oxidative stress.

Brief glance

The primary outcome is Immune Support, but it's also used for Anti-Aging, Recovery & Repair. This compound is considered a Small Molecule. It may be compounded in 503A pharmacies where allowed. It is not listed under a DEA schedule.

Overview

Glutathione is a powerful antioxidant that reduces oxidative stress by neutralizing free radicals and supports detoxification by binding to toxins and heavy metals. It promotes benefits like brighter skin tone, stronger immune function, improved energy, and liver health, with IV therapy offering higher absorption than oral forms. Research links low glutathione levels to chronic diseases such as diabetes, Parkinson's, and autoimmune disorders.

Glutathione (GSH) is a tripeptide composed of the amino acids glutamate, cysteine, and glycine, synthesized in cells and present at high concentrations such as 5 millimolar in most mammalian tissues. It serves as a primary antioxidant, neutralizing reactive oxygen species, free radicals, peroxides, and heavy metals to protect cellular components from oxidative damage. Glutathione acts as a cofactor for enzymes like glutathione peroxidase and S-transferase, facilitating detoxification of xenobiotics, endogenous toxins, and metabolic byproducts through conjugation and reduction reactions. It also participates in leukotriene and prostaglandin biosynthesis, protein redox regulation, amino acid transport, and maintenance of disulfide bonds.

Benefits

Glutathione serves as an antioxidant in clinical settings, primarily administered intravenously to mitigate oxidative stress and support detoxification in conditions like liver disease, including nonalcoholic fatty liver disease and chronic liver abnormalities.¹,²,³,⁴ It demonstrates possibly effective protection against nerve damage and toxicities induced by cisplatin chemotherapy, reducing peripheral neuropathy when given IV by healthcare providers.⁵ Additional evidence supports its role in improving insulin sensitivity, aiding cystic fibrosis management by enhancing lung function and nutritional status, and potentially benefiting peripheral arterial disease through better circulation.¹,²,³,⁴ Research also indicates applications in reducing cell damage from ulcerative colitis and supporting immune modulation in autoimmune disorders, though larger studies are needed for confirmation.³,⁴

Side effects

Glutathione is generally well-tolerated when taken orally at doses up to 500 mg daily for short periods, with most side effects being mild and transient, such as gastrointestinal discomfort including bloating, cramping, diarrhea, and flatulence.⁵,⁶,⁷,⁸ Allergic reactions can occur, manifesting as rash, hives, itching, swelling, or difficulty breathing, and are more common with injectable forms, which also carry risks like asthma exacerbation, zinc deficiency with long-term use, injection site reactions, nausea, headache, and rare severe issues such as anaphylaxis or liver dysfunction.⁶,⁸,⁹,¹⁰,¹¹,¹² Key safety considerations include consulting a doctor before use, especially for those with asthma or allergies, avoiding unregulated IV products due to higher risks, and monitoring zinc levels during prolonged supplementation.⁶,⁸,⁹,¹⁰

Mechanisms of action

Glutathione (GSH), a tripeptide composed of glutamate, cysteine, and glycine, primarily acts as an antioxidant by neutralizing free radicals and reactive oxygen species through its thiol group, which donates electrons and becomes oxidized to glutathione disulfide (GSSG).¹³,¹⁴ The enzyme glutathione reductase then regenerates GSH from GSSG using NADPH, maintaining the cellular redox balance critical for processes like signaling and protein function.¹³,¹⁴,¹⁵ Additionally, GSH facilitates detoxification by conjugating with toxins and xenobiotics via glutathione S-transferases, rendering them water-soluble for excretion.¹³,¹⁵ It also serves as a cofactor for glutathione peroxidase in reducing peroxides and participates in protein S-glutathionylation to protect thiols under oxidative stress.¹⁴,¹⁵