Glutathione-SR is a sustained-release supplement that provides steady antioxidant protection, helping you feel tougher through the day, even on busy days.

The main active ingredient is reduced L-glutathione, picked for its part in supporting your body's antioxidant defences and helping shield cells from daily stress, with Thorne's manufacturing standards, including NSF certification, setting this apart.

Produced in NSF International-certified facilities in the United States, with GMP compliance and batch to batch consistency.

The Time-Sorb delivery system shields reduced L-glutathione from stomach acids, delivering a steady supply across the day. This premium approach sits beside other antioxidant options, including liposomal glutathione and digestive enzymes, giving shoppers a clear choice for daily antioxidant support and detox pathways.

Available Sizes & Variants:

60 Veggie Caps - Daily dose for ongoing support.

Benefits & Features:

• Sustained-release delivery helps steady glutathione levels all day.
• Supports oxidative balance with a dedicated sustained release that shields the glutathione from stomach acids.
• Made by Thorne Research in NSF-certified facilities, ensuring purity and quality.
• Contains a Time-Sorb delivery system and veggie capsule for simple daily use.
• Regular supplementation can raise glutathione levels and support detoxification, with ongoing use recommended for meaningful benefits; steady daily use helps sustain antioxidant protection and resilience against everyday stress.

Thorne Research has earned a reputation for rigorous quality and transparency. Glutathione-SR is made in NSF International-certified facilities in the United States, with GMP compliance and strong batch-to-batch consistency. The Time-Sorb delivery system helps protect reduced L-glutathione from stomach acids, delivering a steady supply across the day. This premium approach stands alongside other antioxidant options, including liposomal glutathione and digestive enzymes, giving shoppers clear choices for daily antioxidant support and detox pathways.

Glutathione (Reduced), High and low viscosity hydroxypropyl methylcellulose, Magnesium Citrate, and Calcium Laurate (Time-Sorb®), Hypromellose (derived from cellulose) capsule, Leucine, Silicon Dioxide.*Glutathione complexed with Time-Sorb®, a time-release matrix.

• GTIN: 693749540038
• Manufacturer: Thorne
• Categories: Best SellersGlutathione SupplementsNew ArrivalsPopular Supplement BrandsSubscribe & Save ProductsThorne Supplements
• 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 1 capsule two to three times daily, or follow your health professional's advice. Take 1 tablet daily or as directed

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

The Active Ingredient Is: Glutathione (Reduced)

Glutathione, particularly in its reduced form, is a tripeptide that functions as a key antioxidant in cells. This sustained-release formulation delivers reduced L-glutathione in a way that supports continuous availability in the bloodstream throughout the day.

This product uses a Time-Sorb sustained-release system within a veggie capsule to protect glutathione from stomach acid, supporting steadier exposure and bioavailability.

What Does Glutathione Do?

Glutathione is involved in neutralising free radicals and supporting cellular antioxidant defences. It also contributes to liver detoxification processes and may support immune function, aligning with EFSA and NHS‑informed understanding of antioxidant roles.

The sustained-release design helps provide a steady supply to tissues over several hours, supporting ongoing cellular protection.

Dr. Richie of the University of Nebraska found that regular supplementation can influence antioxidant status in the body, which underpins the rationale for sustained-release delivery.

This supplement is not intended to diagnose, treat, cure, or prevent any disease.

Welzo’s partnership criteria prioritise manufacturers with a proven track record of quality, openness and scientific rigour. Thorne Research meets this standard, with a long-standing track record in the US for manufacturing excellence and a reputation for dependable, evidence-based formulations. Their focus on purity and potency is shown by NSF International-certified production sites and the NSF-Certified for Sport® distinction, which signals regular third‑party verification for safety and label accuracy. This combination of regulatory compliance and sport‑ready trust sets Thorne apart from peers and aligns with our emphasis on trusted, well‑documented supply chains. Welzo's healthcare professionals have evaluated Thorne for conformity with the standards we enforce, ensuring ethical sourcing, traceability and rigorous quality controls.

Product quality shows in Glutathione‑SR’s sustained‑release design and Time-Sorb® delivery system, built to protect the active ingredient and maintain steady levels. This brand strength makes Thorne especially well‑suited for this liposomal glutathione supplement. Based on our expert vetting, we confidently recommend Thorne for this product category.