Reduced L-Glutathione delivers the body's main intracellular antioxidant in a bioavailable form, supporting cellular protection and detox pathways for everyday resilience. Each vegetarian capsule contains reduced L-glutathione and magnesium, supporting antioxidant protection and cellular detoxification. Klaire Labs has stood for hypoallergenic, physician-backed supplements since 1969, with GMP manufacturing and careful sourcing.

Available Sizes & Variants:

100 capsules - Daily wellness support in a convenient vegetarian capsule.

Benefits & Features:

• Supports daily antioxidant protection.
• Delivers reduced L-glutathione, the key intracellular antioxidant, helping cells resist oxidative stress.
• Magnesium supports absorption and helps maintain balanced minerals essential for energy and function.
• Vegetarian capsule base keeps allergy-friendly formula accessible to a wide range of dietary needs.
• Klaire Labs manufacturing follows good manufacturing practices with strict allergen controls, offering a hypoallergenic option trusted by healthcare professionals since 1969 for purity, safety, and ongoing quality assurance.

Born from Klaire Labs longstanding commitment to purity, this formula uses reduced L-glutathione in a bioavailable form to support your antioxidant status from the inside out. The magnesium included comes as a branded chelate, helping absorption, while the vegetarian capsule keeps the formula allergy friendly. The brand's heritage, trusted by healthcare professionals since 1969 and built on hypoallergenic principles, ensures you are choosing a product backed by real world clinical confidence.

(other) Vegetarian capsule (hydroxypropyl methylcellulose, water), microcrystalline cellulose, and ascorbyl palmitate.

• GTIN: 709616799109
• Manufacturer: Klaire Labs
• Categories: Best SellersGlutathione SupplementsKlaire LabsNew ArrivalsPopular Supplement BrandsSubscribe & Save Products
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

Take one capsule daily with 8 ounces of water, or follow your healthcare professional's advice.

Please consult the product packaging for accurate instructions on how to use the product.

The Active Ingredient Is: Reduced L-Glutathione

Reduced L-Glutathione is the body’s main intracellular antioxidant in its active form, helping protect cells. This nutrient comes in a bioavailable reduced form inside a vegetarian capsule for easy use and absorption. The ingredient is supplied as a standalone antioxidant compound, with the formula designed to support normal oxidative balance and detox pathways in the body.

What Does Reduced L-Glutathione Do?

Reduced L-Glutathione helps keep normal antioxidant status and takes part in cellular detox processes, aligning with EFSA and NHS guidance on antioxidant function and liver support mechanisms.

As part of healthy metabolism, it contributes to normal immune and cellular functions, helping support everyday resilience without implying disease outcomes.

We picked Klaire Labs as our partner for Reduced L-Glutathione because this brand is famed for its long-standing commitment to purity, safety and clinician collaboration. Since 1969, Klaire Labs has been relied on by healthcare practitioners for hypoallergenic supplements and rigorous industry standing, a heritage that strengthens its trustworthiness in high-trust wellness spaces. The manufacturer is recognised for GMP‑aligned production and sourcing transparency, with dedicated allergen controls that prioritise sensitive consumers. This is complemented by Klaire Labs’ history of tight collaboration with medical professionals, supporting a science-led approach that aligns with Welzo’s standards.

Our vetting criteria stressed brand integrity, manufacturing rigour and third-party assurances, all of which Klaire Labs demonstrates through its quality ecosystem. This product is a vegetarian capsule of Reduced L‑Glutathione with magnesium, intended to support antioxidant protection and cellular detoxification as indicated in the research into the product. Klaire Labs’ emphasis on purity and reliable sourcing of ingredients makes them a standout choice against peers in this category.

Welzo’s partnership rationale reflects our team’s evaluation by our expert team of doctors, nurses and nutritionists and our commitment to our quality certification process, ensuring product integrity from purchase to patient use.