Bespoke glutathione and NAC supplement manufacturing
British VitaTech is a glutathione manufacturer that develops and makes custom glutathione and NAC supplements for brands worldwide, from formulation to finished product, and the brand owns the formula.
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Glutathione or NAC, the two routes we build supplements on
Our UK facility serves brands as a glutathione manufacturer, taking custom glutathione and NAC (N-acetylcysteine) supplements from formulation to finished product: capsules, film-coated tablets, liposomal liquids and shots, powders, sachets and stick packs, and gummies. We work with reduced glutathione, S-acetyl glutathione, liposomal glutathione and NAC, choose the form each target market allows, set glutathione doses to the human studies behind your positioning and the NAC dose for each market, and prepare each product for UK, EU and US launch. You receive a certificate of analysis for every batch, reporting reduced and oxidised glutathione or NAC. Your formula is yours.
Glutathione is a tripeptide of glutamate, cysteine and glycine that cells make in two enzyme steps, and the supply of cysteine is one of the key determinants of how much they make (Lu, 2013). That gives brands two routes: supply glutathione itself, or supply NAC, which the body metabolises to cysteine (RIVM, 2024), often with glycine. Glutathione sells in healthy ageing stacks and in beauty supplements, and it is one of the actives we carry in liposomes, as set out on our liposomal supplement manufacturing page. Both routes sit within our healthy ageing and longevity supplement manufacturing.
| Form | What it is | Markets, as of October 2026 |
|---|---|---|
| Reduced glutathione (GSH) | The tripeptide in its active thiol form | UK, EU and US supplements |
| S-acetyl glutathione | Glutathione with an acetyl group on its sulphur, which protects the thiol | US dietary supplements; not authorised in the UK or EU |
| Liposomal glutathione | Reduced glutathione carried in phospholipid vesicles | UK, EU and US, as liquids, shots and powders |
| NAC | The acetylated form of the amino acid cysteine | UK and EU food supplements, alongside licensed NAC medicines; US dietary supplements |
| Glycine with NAC | The two precursors studied together as GlyNAC | Wherever NAC is sold |
Reduced glutathione has long been sold in European food supplements as a non-novel ingredient, as NutraIngredients reported (NutraIngredients, 2026), so it carries no novel food conditions in the UK or EU. We specify reduced glutathione by its purity and by a limit for oxidised glutathione (GSSG), the form it turns into as it degrades, and NAC by its assay and a limit for its disulfide. Both arrive as white crystalline powders, and each lot is checked for identity before it reaches a blend.
Keeping NAC on the food side and glutathione in its reduced form
Study doses, and NAC's status as a medicine
The liposomal glutathione pilot below used 500 mg and 1,000 mg a day (Sinha and colleagues, 2018), and we set glutathione doses to the human studies behind your positioning. For NAC, the food supplements in a risk assessment by the Dutch institute RIVM carried recommended doses of 200 to 2,000 mg of NAC, cysteine or cystine a day, and RIVM concluded that adults can take up to 1,200 mg of NAC a day without harmful effects (RIVM, 2024). NAC is also a medicine: it has a dual status in many EU countries, and the UK has licensed acetylcysteine medicines, including 600 mg effervescent tablets and 200 mg oral powders. The MHRA weighs dose, form, presentation and similar licensed medicines when it classifies a product, so we set the NAC dose for each market and keep every product on the food side in dose, format and wording.
Glutathione, S-acetyl or NAC as the route
The form decides the route. In a randomised controlled trial, daily oral glutathione raised glutathione in blood and cheek cells (Richie and colleagues, 2015). A one-month pilot of liposomal glutathione at 500 or 1,000 mg a day in 12 healthy adults reported increases of up to 40% in whole blood and 28% in plasma, results its authors called preliminary (Sinha and colleagues, 2018). S-acetyl glutathione protects the thiol with an acetyl group. NAC supplies cysteine for the body's own synthesis, and GlyNAC adds glycine, the third building block. We match the form to your markets and evidence base, and a claim of better absorption needs data on your own formula.
Oxidised dimers and sulphurous notes
Thiols oxidise: reduced glutathione forms its oxidised dimer, GSSG, and NAC forms its own disulfide. We keep both dry, cool and away from oxygen, weigh and blend at controlled humidity, pack with desiccants or nitrogen flushing in moisture-barrier packs, and set limits for the oxidised forms at release and across shelf life. Both carry sulphurous notes, which matter most in powders, liquids and gummies, and our flavour and taste masking work starts at the first bench sample.
GlyNAC, vitamin B6 and oxidative stress nutrients
Vitamin C and selenium suit glutathione formulas, because each carries an authorised claim on oxidative stress. NAC pairs with glycine in GlyNAC-style formulas, and vitamin B6 adds the authorised claim "Vitamin B6 contributes to normal cysteine synthesis". Healthy ageing stacks combine either route with NAD+ precursors or urolithin A where each market allows them, as covered on our NAD+ and NMN supplement manufacturing and urolithin A supplement manufacturing pages. Brands also ask us for GlyNAC in muscle health formulas. RIVM does not recommend taking NAC food supplements alongside medicines containing NAC (RIVM, 2024), so we recommend a label statement for people taking medication.
S-acetyl glutathione for the US, and NAC by market
As of October 2026, reduced glutathione can be sold in supplements in the UK, EU and US, while S-acetyl glutathione and NAC depend on the market. No authorised health claim names glutathione or NAC in the UK or EU, so claims come from nutrients in the formula, each at least at a source level and in exact register wording.
| Market | What sells | Claims you can use |
|---|---|---|
| United Kingdom | Reduced and liposomal glutathione; S-acetyl glutathione is not an authorised novel food. Licensed acetylcysteine medicines exist, so NAC supplements stay on the food side in dose, format and wording. | "Vitamin C contributes to the protection of cells from oxidative stress" or "Selenium contributes to the protection of cells from oxidative stress"; for NAC formulas, "Vitamin B6 contributes to normal cysteine synthesis". |
| European Union | Reduced and liposomal glutathione; S-acetyl glutathione is not an authorised novel food. NAC is sold as a medicine and in food supplements in many member states, under national rules. | The same nutrient claims. |
| United States | Reduced and S-acetyl glutathione, with the S-acetyl form's new dietary ingredient position confirmed before launch. NAC is sold under FDA's enforcement discretion policy, which covers NAC products labelled as dietary supplements that are otherwise lawful. | Structure and function claims backed by competent and reliable scientific evidence, notified to FDA and carrying FDA's standard disclaimer. |
FDA's NAC guidance and the GB and EU registers set these positions, and our regulation watch tracks every change that affects your product.
Reduced and oxidised results for buyers
For each market we prepare the label text and claims wording, the product specification, certificates of analysis that report reduced and oxidised glutathione or NAC for every batch, a stability summary and allergen statements. Liposomal products add the vesicle size and encapsulation results, so retailers, marketplaces and importers get the evidence they ask for.
Liposomal shots, GlyNAC sticks and capsules with desiccant
We make every format at our UK facility, which is ISO 9001, HACCP and GMP certified by BSI, and FDA registered.
- Capsules: the simplest format for reduced glutathione, S-acetyl glutathione and NAC, GMP certified, packed with desiccants. See capsule and tablet manufacturing.
- Tablets: film-coated to hold back sulphur notes, with NAC strengths kept distinct from licensed medicines.
- Liposomal liquids and shots: reduced glutathione in phospholipid vesicles, GMP certified, with vesicle size and encapsulation measured on every batch.
- Powders, sachets and stick packs: GlyNAC-style drink mixes, flavoured and masked, sealed in moisture-barrier film.
- Gummies: glutathione at modest doses per piece, GMP certified, with an active assay on every batch as standard.
Glutathione blended at controlled humidity, liposomes under nitrogen
- Specify. We set the form, dose, format, markets and claims with you, and record the status of every active in each target market.
- Approve and receive. Glutathione and NAC come from suppliers that have passed our supplier approval, reviewed annually. Each lot's certificate of analysis for purity, oxidised form and contaminants is checked on receipt, and its identity is confirmed before use.
- Weigh and blend. Materials are weighed and blended at controlled humidity, with odour and dust control, under our allergen management plan with yellow colour coding.
- Fill, compress or form. Capsules are filled and checked by weight, tablets are compressed and film-coated, powders are sealed into sachets and stick packs, and liposomal liquids are made and filled under nitrogen.
- Pack, label and release. Packs carry desiccants or a nitrogen flush where the product needs them. Label verification on every batch is the critical control point in our HACCP plan, CCP-01; three retained samples are kept for shelf life plus one year; and quality control releases each batch against its specification.
Glutathione manufacturer checks: reduced form, NAC and vesicle size
Ask how the reduced form on the label is proved. Every batch is tested by accredited partner laboratories (ISO/IEC 17025), and batch testing is part of every order.
| Test | Typical method | Why it matters |
|---|---|---|
| Reduced and oxidised glutathione | HPLC, at release and at every stability point | Proves the active form and tracks oxidation |
| NAC and its disulfide | HPLC, at release and at every stability point | Proves the dose and tracks oxidation |
| Identity of each ingredient lot | FT-IR against a reference standard | Confirms the ingredient before use |
| Liposome quality | Vesicle size by dynamic light scattering; encapsulation by separation and HPLC | Shows the product is genuinely liposomal |
| Heavy metals | ICP-MS | Lead, cadmium, mercury and arsenic within limits |
| Water and microbiology | Karl Fischer titration; total viable count, yeasts and moulds | Dry products stay stable and within specification |
Our quality system adds a HACCP study per product type, reviewed annually, and a full mock recall, forward and backward with mass balance, in seconds. Nothing is dispatched without quality control sign-off, and our testing and batch release page explains each method.
Research and development is a paid stage that can be included with an order of the right size. Start your project with your markets and positioning, and we will propose the form, the dose and the format for each.
References: Lu, Biochimica et Biophysica Acta (2013); Richie and colleagues, European Journal of Nutrition (2015); Sinha and colleagues, European Journal of Clinical Nutrition (2018); Kumar and colleagues, Journals of Gerontology Series A (2023); RIVM, risk assessment of food supplements containing N-acetylcysteine (2024); US FDA, Policy regarding N-acetyl-L-cysteine, guidance for industry (2022); MHRA, Guidance Note 8, a guide to what is a medicinal product (2025); Commission Regulation (EU) No 432/2012 (2012).
Where it can be sold
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S-acetyl glutathione: UK and EU
Not permittedAs of October 2026, S-acetyl glutathione is not an authorised novel food in the UK or EU, so formulas there use reduced glutathione.
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NAC: UK
Permitted with conditionsAs of October 2026, licensed acetylcysteine medicines exist in the UK, so NAC food supplements stay on the food side in dose, format and wording.
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NAC: EU
Permitted with conditionsAs of October 2026, NAC is sold both as a medicine and in food supplements in many member states, under national rules.
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NAC and S-acetyl glutathione: US
Permitted with conditionsAs of October 2026, NAC is sold in dietary supplements under FDA's enforcement discretion policy, and S-acetyl glutathione under the new dietary ingredient rules.
Where this is going
To 2030
Flat to up: an EU authorisation of S-acetyl glutathione would open a new route
To 2036
Flat: a niche antioxidant with limited new evidence
What to watch
A thin trial pipeline (GlyNAC rests on small studies)
Questions brands ask
Can you make glutathione supplements for the UK and EU?
Yes, with reduced glutathione, including liposomal reduced glutathione. As of October 2026, reduced glutathione is sold in food supplements in the UK and EU, while S-acetyl glutathione is not authorised as a novel food in either. In the US, both forms are sold in dietary supplements, and we confirm the S-acetyl form's new dietary ingredient position before launch. We make capsules, tablets, liposomal liquids, powders and gummies in the UK.
What is the difference between reduced, S-acetyl and liposomal glutathione?
They differ in how the glutathione is protected. Reduced glutathione is the active thiol form and the standard grade. S-acetyl glutathione carries an acetyl group on its sulphur, which protects the thiol from oxidation. Liposomal glutathione wraps reduced glutathione in phospholipid vesicles, and a one-month pilot in 12 healthy adults reported increases of up to 40% in whole-blood glutathione. We choose the form by market, format and evidence.
Can NAC be sold as a food supplement?
It depends on the market, as of October 2026. In the US, NAC products labelled as dietary supplements that are otherwise lawful are sold under FDA's enforcement discretion policy. In many EU countries NAC has a dual status, sold both as a medicine and in food supplements. The UK has licensed acetylcysteine medicines, such as 600 mg effervescent tablets, so we keep NAC supplements on the food side in dose, format and wording.
What doses do glutathione and NAC products use?
A one-month pilot of liposomal glutathione used 500 mg and 1,000 mg a day. For NAC, the food supplements in a risk assessment by the Dutch institute RIVM carried recommended doses of 200 to 2,000 mg a day, and RIVM concluded that adults can take up to 1,200 mg a day without harmful effects. National rules differ, so we set the dose for each market you sell in and keep NAC clear of licensed medicine strengths.
What claims can a glutathione or NAC product make?
In the UK and EU, claims come from nutrients in the formula, because no authorised health claim names glutathione or NAC as of October 2026. Selenium at a source level carries "Selenium contributes to the protection of cells from oxidative stress", and vitamin C carries the same claim. In the US, structure and function claims need competent and reliable scientific evidence, a notification to FDA and the standard disclaimer. Absorption claims need data on your own formula.
How do you keep glutathione and NAC stable?
By keeping them dry, cool and away from oxygen. Both are thiols: reduced glutathione oxidises to GSSG and NAC to its disulfide. We weigh and blend at controlled humidity, pack with desiccants or a nitrogen flush in moisture-barrier packs, and set limits for the oxidised forms at release and across shelf life. Film coatings and flavour work handle the sulphur notes, and stability studies in the final pack set the shelf life.
How do you test glutathione and NAC supplements?
Every batch is tested by accredited partner laboratories (ISO/IEC 17025) as part of every order. HPLC measures reduced and oxidised glutathione, or NAC and its disulfide, at release and through shelf life; FT-IR confirms the identity of each ingredient lot; and heavy metals, water and microbiology complete the panel. Liposomal products add vesicle size and encapsulation, and quality control releases every batch against its specification.