The Glutathione Index Test is a unique at-home blood test that measures one of the most important markers of your cellular health: your glutathione status. Glutathione is often called the master antioxidant, produced by your body to neutralize free radicals, detoxify cells, and maintain mitochondrial function. Unlike standard antioxidant tests that only assess total levels, this test evaluates both reduced glutathione (GSH) and oxidised glutathione (GSSG) to calculate your GSH:GSSG ratio, a gold-standard biomarker of oxidative stress and redox balance.

If you’re serious about longevity, immune function, or cellular health, measuring your glutathione status is one of the most powerful ways to assess how well your body is coping with internal and external stressors. A low GSH:GSSG ratio suggests your antioxidant defenses are overwhelmed, increasing the risk of inflammation, tissue damage, and accelerated aging.

With just a few drops of blood collected at home using a simple dried blood spot (DBS) card, this lab-based test gives you clinical-grade insights—no clinic visit required.

Whether you’re managing chronic conditions, supporting detox pathways, tracking recovery, or optimising performance and healthy aging, this test reveals what your blood isn’t saying in standard panels.

Glutathione is your body’s first line of defense against oxidative damage. It plays a central role in:

• Detoxifying toxins and heavy metals
• Supporting immune health and inflammation balance
• Regenerating other antioxidants (like vitamins C and E)
• Maintaining mitochondrial energy production
• Slowing the cellular aging process

A low Glutathione Index may reflect oxidative stress or a depletion of antioxidant capacity. This can result from chronic inflammation, poor diet, lack of sleep, overtraining, illness, or environmental toxin exposure.

You can naturally support your glutathione levels and redox balance through targeted diet, lifestyle changes, and supplementation strategies:

• Exercise regularly: Moderate-intensity physical activity has been shown to increase glutathione production and improve antioxidant enzyme activity.
• Eat glutathione-boosting foods: Include sulfur-rich foods like broccoli, cauliflower, garlic, onions, and Brussels sprouts. These help your body produce more glutathione naturally.
• Support with antioxidant nutrients: Vitamins C and E, selenium, and zinc help regenerate and stabilise glutathione. Alpha-lipoic acid and CoQ10 also enhance redox cycling.
• Avoid alcohol and processed foods: These increase oxidative stress and may deplete your natural glutathione reserves over time.
• Supplement precursors when needed: N-acetylcysteine (NAC), liposomal glutathione, milk thistle (silymarin), and whey protein are all proven to support glutathione synthesis and recycling.
• Prioritise sleep and manage stress: Oxidative stress increases with poor sleep and chronic stress. Aim for quality rest and include stress-reducing practices like breathwork, meditation, or yoga.
• Monitor and retest: Recheck your Glutathione Index every 6–12 weeks, especially when making changes to your diet or supplement routine. This helps track how your body responds over time.

• GSH (Reduced Glutathione): 400–900 μmol/L
• GSSG (Oxidized Glutathione): 10–30 μmol/L
• GSH:GSSG Ratio (Glutathione Index): Optimal: ≥700, Suboptimal: 400–700 & Low: <400 (suggests elevated oxidative stress)

A high Glutathione Index (GSH:GSSG ratio) indicates strong antioxidant capacity and low oxidative stress. A low ratio may reflect inflammation, cellular aging, or toxin exposure. This balance is one of the best markers of redox status and biological resilience.

• Wu et al. (2004): Demonstrated that a lower GSH:GSSG ratio is a sensitive marker of oxidative stress and cellular dysfunction, often preceding signs of chronic disease.
• Jones et al. (2002): Identified the redox potential of the GSH/GSSG couple as a key determinant of cellular signaling, immune modulation, and apoptosis.
• Pizzorno (2014): Reviewed glutathione as the most important antioxidant in human physiology—critical for detoxification, mitochondrial health, and immune resilience.
• Sekhar et al. (2011): Found that glutathione deficiency is common in aging and metabolic syndrome, and supplementation with NAC can restore redox balance.

These studies support the clinical value of measuring both reduced and oxidized glutathione, and using the GSH:GSSG ratio as a sensitive biomarker of oxidative stress, detox capacity, and biological aging.

The Glutathione Index Test empowers you to track these changes and personalize your health strategy with confidence.

• Measure oxidative stress at the source – Evaluate your body’s antioxidant capacity and redox balance with the gold-standard GSH:GSSG ratio
• Track supplement effectiveness – See whether NAC, alpha-lipoic acid, or glutathione supplementation is actually improving your antioxidant status
• Support detox and immune function – Understand how well your body is neutralizing free radicals and eliminating toxins
• Guide anti-aging and longevity strategies – Use objective data to assess cellular resilience and inform lifestyle changes
• Easy at-home collection – Just a few drops of blood via finger-prick, no venous draw or clinic visit required

• Reduced Glutathione (GSH) – the active, protective form
• Oxidised Glutathione (GSSG) – the “used” form after neutralizing free radicals
• GSH:GSSG Ratio – a gold-standard marker of oxidative stress and redox balance

This test is ideal for people who:

• Want to monitor oxidative stress and recovery
• Are focused on healthy aging or detoxification
• Take antioxidants (like NAC, alpha lipoic acid, CoQ10) and want to track their impact
• Are managing chronic inflammation or metabolic stress
• Are athletes or biohackers monitoring redox balance

• Dried blood spot (DBS) collection card
• Lancets, alcohol swab, gauze, bandage
• Prepaid return envelope and instructions
• Accredited lab analysis + secure online results