What Is Glutathione? A Simple UK Guide

Oct 15

3 min read

Glutathione has become one of the most searched supplement ingredients in the UK. If you have seen it on social media or in the beauty aisle and wondered what it actually is, this guide explains it in plain English, with no hype.

Glutathione in one sentence

Glutathione is a small molecule made of three amino acids, glutamate, cysteine and glycine, that your body makes naturally in every cell.

Because it is built from three amino acids, scientists call it a tripeptide. You will often see it shortened to GSH.

What does glutathione do in the body?

Glutathione is one of the body's own antioxidant molecules. It is part of the system cells use to manage oxidative stress, the everyday wear that comes from normal metabolism, pollution and UV light.

Your body makes glutathione itself. Production depends on having enough of its building blocks, and levels naturally vary between people.

Can you get glutathione from food?

Some foods contain glutathione, including asparagus, avocado and spinach. Cooking and storage reduce the amount. Foods rich in the building blocks, such as protein foods that supply cysteine, also matter.

A varied, balanced diet always comes first. Supplements are an addition, not a replacement.

Reduced glutathione vs other forms

There are a few forms on the UK market. Here is how they differ.

Form	What it is	Common in
Reduced L-glutathione (GSH)	The active form the body makes and uses	Capsules and tablets
Oxidised glutathione (GSSG)	Two glutathione molecules joined together	Less common in supplements
Liposomal glutathione	Glutathione wrapped in fat-based spheres	Liquids and softgels
S-acetyl glutathione	A modified form with an added acetyl group	Specialist capsules

Most UK capsules, including Gluta Fair Plus, use reduced L-glutathione.

What does the research say about glutathione supplements?

Honest answer: research on oral glutathione is still developing. Studies have been small, short and mostly in limited groups of people, and researchers continue to study how much is absorbed.

That's why, under UK rules, no health claims are authorised for glutathione itself. Be wary of any UK brand promising specific results from glutathione alone.

What you can rely on are the nutrients with authorised claims that are often paired with it. Vitamin C, for example, contributes to normal collagen formation for the normal function of skin, and contributes to the protection of cells from oxidative stress.

What to look for in a glutathione supplement in the UK

Use this checklist before you buy.

The form. Look for "reduced L-glutathione" on the label.
The dose per serving. Check whether the amount is per capsule or per daily serving. Many products list it per serving of two capsules.
Added nutrients with authorised claims. Vitamin C and biotin have claims you can rely on for skin and hair.
Where it's made. UK manufacture to GMP (Good Manufacturing Practice) standards means a controlled process.
Independent testing. Third-party testing checks that what's on the label is in the capsule.
Diet suitability. Check whether the capsule shell is vegan (HPMC) or gelatine.
A UK address on the pack. Supplements sold in the UK should list a UK-based business responsible for the product.

Gluta Fair Plus: what's inside

Gluta Fair Plus is made in the UK for Nompharma Ltd, a pharmaceutical wholesaler based at BioCity, Nottingham. Each daily serving of 2 capsules contains:

500mg reduced L-glutathione
150mg vitamin C (187.5% NRV), which contributes to normal collagen formation for the normal function of skin
60µg biotin (120% NRV), which contributes to the maintenance of normal hair and normal skin

It's made to GMP standards, third-party tested, and suitable for vegetarians and vegans. One bottle of 60 capsules lasts 30 days.

Frequently asked questions

Is glutathione the same as glutamine? No. Glutamine is a single amino acid. Glutathione is a tripeptide made from three amino acids.

Is glutathione vegan? Glutathione itself is usually made by fermentation. Whether the product is vegan depends on the capsule and other ingredients, so check the label. Gluta Fair Plus is suitable for vegetarians and vegans.

Who should not take glutathione supplements? Supplements are for adults. If you are pregnant, breastfeeding, taking medication, have a medical condition or are under medical supervision, speak to your GP or pharmacist first.

Looking for a UK-made glutathione supplement? Gluta Fair Plus combines 500mg reduced L-glutathione with vitamin C and biotin in vegan capsules. Shop Gluta Fair Plus →

Food supplements should not be used as a substitute for a varied, balanced diet and a healthy lifestyle. Do not exceed the recommended daily intake.