Product guide · Food supplement

Genetic Nutrition Laboratories N-Acetyl L-Cystein · 120 capsules (NAC)

N-acetyl L-cysteine (NAC) capsules from GN Laboratories, 120 capsules. This guide sets out what the manufacturer states about the composition of Genetic Nutrition Laboratories N-Acetyl L-Cystein · 120 capsules (NAC), what independent research says about its main ingredient, and the safety and regulatory points that apply.

Educational guide · Sources checked 4 November 2026 · 4 references

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Named ingredients: 1
Amounts stated: None
Status: Food supplement
Evidence summaries: 1

Overview

Manufacturer information

This is N-acetyl L-cysteine (NAC), an amino acid derivative, in vegan capsules, 120 per bottle.

Ingredients & composition

Manufacturer information

Ingredient	Amount
N-acetyl L-cysteine (NAC)	Not stated

The manufacturer does not state the amount of any ingredient. Without amounts, the research summarised in this guide cannot be related to this product's dose.

Scientific background

Independent research

N-acetylcysteine (NAC)

N-acetylcysteine (NAC) is a form of the amino acid cysteine and a precursor of glutathione, the body's main antioxidant. It is also used as a licensed medicine, for example as a mucolytic.

Research evidence

Independent research

N-acetylcysteine (NAC)

A meta-analysis found that NAC can raise glutathione levels after physical exertion, with mixed effects on other markers of oxidative stress and muscle damage¹.

Evidence limitations

Independent research

This product does not state all ingredient amounts, so the doses used in research cannot be compared with what one serving provides.

No published study has tested this specific product; the research summarised here concerns the ingredient itself.

N-acetylcysteine (NAC)

Effects on performance in healthy people are not established¹.

Safety & potential risks

Manufacturer label

Do not exceed the recommended daily dose.
Food supplements should not be used as a substitute for a varied and balanced diet and a healthy lifestyle.
Keep out of the reach of young children.

Independent research

N-acetylcysteine (NAC)

NAC can cause nausea and digestive upset; people with asthma or taking nitroglycerin should ask a doctor first.

Regulatory status

GIGACULT product information

Sold as a food supplement. No health claims are made for this product.

Regulation and sport

N-acetylcysteine (NAC)

NAC is a medicinal substance in several EU Member States; its use in food supplements depends on national rules². No health claim for this ingredient is authorised in the EU³; botanical ingredients are sold under national food-supplement rules⁴.

Scientific references

Sadowski M, Zawieja E, Chmurzynska A. The impact of N-acetylcysteine on lactate, biomarkers of oxidative stress, immune response, and muscle damage: a systematic review and meta-analysis. J Cell Mol Med. 2024;28:e70198. PubMed 39632267
Directive 2001/83/EC on the Community code relating to medicinal products for human use. Official Journal of the European Union. Source
Commission Regulation (EU) No 432/2012 establishing a list of permitted health claims made on foods. Official Journal of the European Union. Source
Directive 2002/46/EC on the approximation of the laws of the Member States relating to food supplements. Official Journal of the European Union. Source

Sources checked against PubMed, Crossref or the official publisher on 2026-11-04. Manufacturer information is taken from the product's own data and has not been independently tested.

The product