Glutathione Index Test | Food for the Brain Foundation

because prevention is better than cure.

because prevention is better than cure.

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Glutathione Index

£69.00

Glutathione is often called the body’s master antioxidant.

It helps protect your brain and cells from oxidative stress, a key driver of cellular ageing and age-related changes in memory and thinking, while supporting detoxification, energy production and overall resilience.

This simple finger-prick blood test measures your Glutathione Index, giving you insight into one of the body’s most important protective systems and whether your levels are in the optimal range for healthy brain ageing. Understanding your glutathione status can help you make more informed decisions about your nutrition, lifestyle and long-term brain health.

Available to order in the UK, EU, USA, Canada, Australia, New Zealand, Japan, Singapore, Malaysia.

 

 

Description

Your brain’s first line of defence against ageing

Every day, your brain is exposed to oxidative stress, a natural process that can damage cells and contribute to age-related changes in memory, thinking and cognitive function. One of the body’s most important defences against this process is glutathione, often called the master antioxidant.

Glutathione helps protect brain cells from damage, supports healthy energy production, aids detoxification and helps maintain the resilience of cells as we age. Yet most people have never measured it.

This simple finger-prick blood test measures your Glutathione Index, giving you insight into whether one of your body’s most important protective systems is operating in the optimal range for healthy brain ageing and long-term cognitive health.

 

Why test your glutathione level?

Understanding your glutathione status may help you:

  • Assess your body’s ability to defend itself against oxidative stress
  • Support a more personalised approach to nutrition and supplementation
  • Monitor an important marker linked to healthy ageing and cellular resilience
  • Track changes in your antioxidant status over time
  • Gain deeper insight into your long-term brain health

How the test works

Your kit includes everything you need to collect a simple finger-prick blood sample at home and return it to our laboratory for analysis.

Please note: This test requires a fasted blood sample.

  • Perform the test first thing in the morning after a 12-hour fast
  • Avoid food and drink during the fasting period
  • Refrain from smoking for at least 2 hours before testing, ideally 12 hours

What’s included?

  • 2 lancets
  • Glutathione Index blood spot sample collection card in a sealed foil envelope
  • Prepaid return envelope
  • Alcohol swab
  • Gauze pad
  • Adhesive bandage

Contributing to independent research

When you purchase a Glutathione Index Test, you are also contributing to Food for the Brain’s ongoing research programme.

Your anonymised results will be added to the COGNITION Biobank, helping advance our understanding of the links between nutrition, lifestyle and cognitive health. As part of this citizen science project, you will also be invited to retake your Cognitive Function Test, track changes in your Dementia Risk Index and participate in our evidence-based brain health improvement programme.

All data is securely stored and managed in accordance with HIPAA and GDPR standards.

Available Countries

Available in the UK, EU, USA, Canada, Australia, New Zealand, Japan, Singapore and Malaysia.

For more information, read the FAQs here.

 

Email tests@foodforthebrain.org with any questions you have.

Additional information

Weight 50 g
Dimensions 1.0 × 1.0 × 1.0 cm
Refund Policy

Refunds and Returns Policy – Blood Test Kits
Food for the Brain Charity
This Refunds and Returns Policy (“Policy”) applies to all blood test kits purchased directly from the Food for the Brain Charity (“Charity”, “we”, “our”). By placing an order, you (“Customer”, “you”, “your”) agree to this Policy, in addition to our Terms & Conditions.

1. Eligibility for Refunds
Cooling-Off and Return Periods
Cooling-Off Period: You have 14 days from receiving the goods to notify us that you wish to cancel.
Return Period: After notifying us, you have a further 14 days to return the goods.
1.1 Conditions: You can receive a refund if:-
The kit is unused, complete with all components, packaging, and seals intact.
No blood sample has been collected, submitted, or processed.
1.2 Non-Refundable Costs: Postage and delivery charges are non-refundable unless otherwise stated.
1.3 Exclusions: We cannot refund the kit if any of the following apply : –
The kit has been opened, used, or any seal has been broken.
A sample has been submitted for testing
Laboratory analysis has commenced or results have been issued

2. Refund & Return Procedure
2.1 Initiating a Refund To request a refund, you must:
1. Email tests@foodforthebrain.org with your order number, proof of purchase, and reason for return.
2. Return the unused kit to the address provided by the Charity.
3. Ensure all packaging, components, and seals remain intact.

2.2 Inspection and Processing
We will check the returned kit to confirm it meets the refund conditions. Refunds will be issued to the original payment method, minus any applicable restocking, postage, packaging, or administrative fees. Refunds will be processed within 10–30 business days of approval.

3. Replacements
Replacement Fee
A replacement fee applies for any kit provided to replace an unused, expired, or invalid sample. This fee covers the cost of producing, packaging, and sending the new kit, as well as administration, and does not include laboratory analysis or processing costs.
If a kit is lost or misdelivered because the address details were entered incorrectly, a replacement fee will apply.
In cases of confirmed defective or damaged kits, reported within 7 calendar days of receipt, a replacement kit or full refund will be provided. No fees will be charged for verified defective items.
Expired Kits: If a kit expires unused, the Charity will offer a replacement kit. The replacement fee will apply.
Samples That Cannot Be Processed: If a sample cannot be processed due to issues with the collection steps, the Charity may provide a replacement kit. The replacement fee may apply. To avoid quality issues with your sample, please follow the blood collection instructions carefully.

4. Statutory Rights and Governing Law
Statutory Rights This refund policy is designed to comply with applicable consumer protection laws in the United Kingdom and European Union. If you are purchasing from outside the UK or EU, your local consumer protection rights may differ. Nothing in this Policy limits or excludes any rights you may have under the laws of your country of residence.
Governing Law and Jurisdiction This Policy and all sales of test kits from the Charity are governed by the laws of England and Wales, except where local law provides otherwise. To the extent permitted by applicable law, disputes arising under this Policy shall be subject to the exclusive jurisdiction of the courts of England and Wales.

Consumer-Friendly Version (Website Checkout Page)
Refunds & Returns – Blood Test Kits
Food for the Brain Charity
We want you to be happy with your purchase. Here’s what you need to know about refunds and replacements:
1. Can I get a refund?
Cooling-Off and Return Periods
Cooling-Off Period: You have 14 days from receiving your kit to notify us if you want to cancel.
Return Period: After notifying us, you have a further 14 days to return the kit.
Refunds are only available if: –
The kit is unused and all packaging and seals are intact.
No sample has been submitted for testing.
2. How to return a kit
Email tests@foodforthebrain.org with your order number, proof of purchase, and reason for return.
Send back the unused kit in its original packaging.
We’ll inspect it and, if eligible, issue a refund to your original payment method (minus any applicable fees) within 10–30 business days.
3. Replacements
Replacement Fee: A replacement fee applies for any kit provided to replace an unused, or expired kit, or invalid sample. This fee covers the cost of producing and sending the new kit, as well as administration, and does not include lab testing.
If a kit is lost, misdelivered, or returned outside the refund window, a replacement kit may be offered. The replacement fee will apply.
For defective or damaged kits reported within 7 days of delivery, we will replace the kit at no cost.
If your kit expires before use, we can provide a replacement kit. The replacement fee will apply.
If a sample cannot be processed due to issues with the collection steps we can provide a replacement kit. The replacement fee will apply. Please follow all instructions carefully.
4. Your rights
UK and EU customers: This policy follows applicable consumer protection laws.
International customers: Your local consumer rights may differ, but this policy does not limit any rights you may have in your country.