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NAG Supplement
NAG Supplement
0038NAG SupplementSize
Sans nano-particulesSans gluten
Care of joints, bones and muscles
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42.00 €(44.11 US$) in stock
Advanced form of natural-source glucosamine
  • Naturally extracted from chitin from marine invertebrates.
  • Rapidly absorbed in the gut.
  • Combined action with chondroitin.
  • Supports optimal mobility and flexibility.
38.64 €  
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42.00 €
90 Veg. Caps
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Man sitting down, holding knee with two hands due to joint pain

NAG Dietary Supplement, 90 Caps: Evolved Form of N-Acetyl Glucosamine

What is glucosamine?

Glucosamine is an amino-monosaccharide produced endogenously in humans and animals from glucose and glutamine which is then converted into N-acetylglucosamine.

First used clinically by German doctors in 1969, it is very popular in Europe, and has in recent years also attracted considerable interest in the Americas and Asia. Unfortunately, its growing popularity has meant that the quality of supplements has fallen significantly over the last 10 years.

Where is glucosamine found in the diet? There are actually no foods that contain glucosamine.

Where does N-acetyl-glucosamine come from? How is it produced?

The ingredient in our supplement is naturally extracted from the chitin of marine invertebrates (the shells of shrimps, lobsters, crabs, etc). It’s an organic material with amazing physical and chemical properties.

Enzymes are then used to hydrolyse (break down) the molecule into several pieces. Many organisms contain these chitinase enzymes (1) which are involved in a range of physiological and pathological functions (2). Once these enzymes have completely digested the chitin molecule, we get N-acetyl-glucosamine (3).

What are glucosamine’s mechanisms of action?

Its mechanisms of action are being investigated: hundreds of scientific studies are published every year but because of current European regulations, we cannot cite any of them.

Almost 90% of glucosamine taken orally is absorbed in the gastrointestinal tract. Glucosamine is well-known for easily crossing the body’s biological barriers, except in the stomach where its polar form prevents it from passing through cell membranes.

Following first-pass metabolism in the liver, it is distributed to various biological structures in the body. The metabolised portion is thus found in carbon dioxide in exhaled air.

Frequently-asked questions

Which supplements can be combined with N-acetyl-glucosamine ?

Glucosamine combines perfectly with chondroitin .

Does the production of N-acetyl-glucosamine harm the environment?

Glucosamine production from crustacean chitin enables the use of fishery co-products with highly-nutritious molecules. Such use is consistent with the Common Fisheries Policy which aims to reduce the amount of fish thrown back into the sea and ensure responsible and sustainable fishing..

What’s more, NAG produced by chemical methods produces chemical waste which is not at all environmentally-friendly.

What dose should you take?

N-acetyl-glucosamine has been used as a nutritional supplement for many decades and remains very popular.

The majority of studies confirm the efficacy or safety of a 500mg dose taken three times a day. This can either be taken as a single dose or spread across three doses, one 500mg capsule with each meal).

At these doses, it is completely safe. Above 3000mg of glucosamine, saturation of the absorption process has been observed.

More information:

Five common misconceptions about arthritis

Updated: 30/04/2018


This product should not be used to replace a varied, balanced diet or healthy lifestyle. Follow the advice on use, the recommended daily dose and the use-by date. Not recommended for women who are pregnant or breastfeeding, or for children under 15. Keep out of young children’s reach. Store in a cool, dry place.

Daily serving: 3 capsules
Number of servings per bottle: 30
Quantity per serving
N-acetyl glucosamine 1 500 mg
Other ingredients: Acacia gum, rice bran.
Directions for use
Take from 1 to 3 tablets per day with meals.
Each vegetarian capsule contains 500 mg of N-acetyl glucosamine.
Warning: Do not take if you have an allergy to shellfish.
4.6 /5 5 reviews
4.3 / 5
4.3 / 5
Value for money
3.3 / 5

Reviews 5
80 %

En 3 mois beaucoup moins de douleurs ostéo-articulaire! Je poursuis ce traitement anti-arthrose!!!
Mr Nesztler
Dirk Kemps
Onvoldoende informatie welk type n acrtyl glucosamine er exact in de pot zit
dominique villiers
bcp mieux je suis en association avec chondroïtine
recommandé pour l arthrose et efficace sans effet secondaire
  1. Gooday GW. The Ecology of Chitin Degradation. Adv. Microb. Ecol. 1990;11:387–430.
  2. Gooday BW. Biosynthesis of the Fungal Wall—Mechanisms and Implications. The First Fleming Lecture. J. Gen. Microbiol. 1977;99:1–11.
  3. Lee EA, Pan CH, Son JM, Kim SI. Isolation and Characterization of Basic Exochitinase from Leaf Extract of Rehmannia glutinosa. Biosci. Biotechnol. Biochem. 1999;63:1781–1783.

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