NAC (N-acetylcysteine): role and supplements

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N-acetylcysteine (NAC, or N-acetyl-L-cysteine) is the acetylated form of cysteine, a sulphur-containing amino acid supplied by protein-rich foods. Cysteine is one of the three amino acids that make up glutathione, of which NAC is therefore a precursor. It is available in capsules, alone or in combination.

Discover its definition, its forms and our selection.

NAC (N-acetylcysteine): role and supplements | NATURAMedicatrix

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NATURAMedicatrix

NAC 300

120 vegetable capsules

€21.70 €22.90

-58% Short BBD

NATURAMedicatrix

Endocriway AI

60 vegetable capsules

€18.00 €43.00

NATURAMedicatrix

DETOX

90 capsules

€29.50

Immuno-Muqueuse: immunity & mucous membranes, 320 g | Dr. Jacob’s®

Out of stock

Dr. Jacob's® Medical

Immuno-muqueuse

320 g (20 servings)

€43.95 €69.90

Active ingredients guide

N-acetylcysteine (NAC): definition, role and supplements

N-acetylcysteine, better known by its abbreviation NAC, is the acetylated form of cysteine: a small acetyl group is attached to the nitrogen atom of this amino acid. It is also written n-acetyl-cysteine, N-acetyl-L-cysteine or, as two words, N-acetyl cysteine.

Cysteine is a sulphur-containing amino acid found in dietary proteins. It is one of the three amino acids that make up glutathione, a small molecule made by our cells. This is why NAC is described as a precursor of glutathione.

An acetylated cysteine

A stable form of this sulphur-containing amino acid.

A glutathione precursor

It supplies cysteine, one of the building blocks of glutathione.

A sulphurous smell

A slight characteristic odour, linked to its sulphur atom.

Composition

Cysteine, NAC and glutathione: how are they linked?

These three names often come up together. Here is what sets them apart:

Cysteine

A sulphur-containing amino acid, supplied by the diet and made by the body.

NAC

Its more stable acetylated form, used in food supplements.

Glutathione

A tripeptide made up of cysteine, glycine and glutamic acid.

Sources and forms

Where can cysteine and NAC be found?

NAC is not present as such in the diet. Cysteine, on the other hand, is supplied by protein-rich foods: eggs, meat, poultry, fish, dairy products, pulses and oilseeds.

As a food supplement, NAC comes mainly in capsules, alone or combined with plants, vitamins or minerals. It is also included in powders to be diluted. N-acetylcysteine also exists as a medicine, which falls under different regulations from food supplements.

What research says

N-acetyl-cysteine: what does science say?

NAC is a widely studied molecule. Researchers are particularly interested in how it is absorbed, converted into cysteine and used by cells to make glutathione.

To date, no health claim relating to N-acetylcysteine is authorised in the European Union. This research therefore does not allow any particular effect to be attributed to a food supplement containing it. During pregnancy and breastfeeding, or if you are taking any medication, ask your doctor for advice.

Buying guide

How to choose a NAC supplement?

The NAC dose

It should be stated in milligrams, per capsule and per day.

Alone or combined

Pure NAC, or a formula combined with plants and vitamins.

A vegetable capsule

A plant-based shell suits people who avoid gelatine.

Storage

Away from moisture, with the bottle tightly closed after use.

Our selection

Our NAC supplements

NAC alone or in combination: here are three formulas. Find all our products containing N-acetylcysteine in the list above.

NAC 300 — 120 vegetable capsules

299 mg of N-acetylcysteine per capsule, with 20 mg of milk thistle. Vegan.

Discover NAC 300 →

DETOX — 90 capsules

180 mg of NAC per 4 capsules, with chlorella, coriander and Sulfodyne® broccoli extract.

Discover DETOX →

Immuno-muqueuse — 320 g

A powder to be diluted, combining plant proteins, L-glutamine, vitamins, minerals and 280 mg of acetylcysteine per serving.

Discover Immuno-muqueuse →

Frequently asked questions

N-acetylcysteine FAQ

What is NAC?

N-acetylcysteine, an acetylated form of cysteine, a sulphur-containing amino acid. It is used in food supplements, alone or in combination.

What is the difference between NAC and glutathione?

Glutathione is a tripeptide made by cells. NAC is a precursor: it supplies cysteine, one of its three amino acids.

Is organic N-acetylcysteine available?

NAC is a purified molecule, not an agricultural ingredient: it does not usually carry an organic label. It is better to look at the dose and the composition.

Where can I buy NAC?

In pharmacies, specialist shops or online. At NATURAMedicatrix, NAC is offered in vegetable capsules and in several combined formulas.

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NATURAMedicatrix is an Elsee partner. Order your supplements on naturamedicatrix.fr, send your invoice to Elsee and benefit from the reimbursement provided by your coverage.

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Call us: +33977423704
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N-acetylcysteine (NAC)

NAC 300

Endocriway AI

DETOX

Immuno-muqueuse

N-acetylcysteine (NAC): definition, role and supplements

Cysteine, NAC and glutathione: how are they linked?

Cysteine

NAC

Glutathione

Where can cysteine and NAC be found?

N-acetyl-cysteine: what does science say?

How to choose a NAC supplement?

The NAC dose

Alone or combined

A vegetable capsule

Storage

Our NAC supplements

NAC 300 — 120 vegetable capsules

DETOX — 90 capsules

Immuno-muqueuse — 320 g

N-acetylcysteine FAQ

What is NAC?

What is the difference between NAC and glutathione?

Is organic N-acetylcysteine available?

Where can I buy NAC?

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