Boost cellular glutathione—your body's master antioxidant for liver and respiratory defence

NAC 600mg per capsule serves as a precursor to glutathione synthesis, your body's primary intracellular antioxidant. This compound reduces oxidative stress in the liver, lungs, and nervous system while supporting detoxification pathways and healthy inflammatory responses at the cellular level.

Why This Formula

✔ 600mg NAC per capsule—substantial dose supporting measurable glutathione elevation
✔ Taken between meals on empty stomach for maximum bioavailability
✔ Precursor to glutathione rather than exogenous glutathione (which doesn't survive digestion)
✔ Supports multiple detoxification pathways and gene expression related to oxidative stress
✔ Free from lactose, gluten, wheat, soya, yeast, dairy, and GMOs

Who It's For

Essential for those exposed to environmental stressors, air pollution, or industrial settings. Valuable for heavy smokers, those with compromised respiratory function, or anyone concerned with liver support and detoxification. Athletes appreciate NAC's recovery and antioxidant benefits.

The xSpan Labs Standard

Small-batch manufactured in the UK to GMP and ISO 9001 standards. No unnecessary fillers, no artificial colours, no inflated marketing—just premium-grade ingredients in their most effective forms. Every batch is tested for purity and potency.

N-Acetyl Cysteine ( NAC ) 600 mg 120 Capsules

Name: N-Acetyl Cysteine ( NAC ) 600 mg 120 Capsules
Brand: xSpan Labs
SKU: XS-435-NAC
Rating: 4.8 (12 reviews)

Rating is 4.8 out of five stars based on 12 reviews

SKU: XS-435-NAC

£18.99

£15.97

Quantity

Directions

Take one capsule 1-2 times per day or as instructed by your health care practitioner. Best taken between meals with water.

Ingredients

NAC (N-Acetyl-Cysteine) 600mg,

Other Ingredients: HPMC Capsule Shell, Magnesium Stearate, Maltodextrin, Silicon Dioxide.

Cautions

NAC should not be taken by people who have peptic ulcers. Not suitable for anyone wishing to remove corn from their diet.

Always consult your health practitioner before taking nutritional supplements if you are taking medication or are under medical supervision. Pregnant or lactating mothers should consult a health practitioner before using health supplements. You should not take supplements as a substitute for a varied balanced diet. Store in a cool dry place, out of reach of children. Do not exceed stated dose unless under instruction from your health practitioner. Allergies/Intolerances:This product is manufactured in a facility that also handles allergy based materials such as nuts, seeds, milk, egg, cereals, soya, mustard, celery, fish, crustaceans and sulphites.

Suitable for both Vegetarians or Vegans.
xSpan Labs NAC N-Acetyl Cysteine 600 mg 120 Capsules - Powerful Liver & Lung Function Support from this Cellular Glutathione Enhancing Antioxidant:

N-acetylcysteine (NAC), a precursor for glutathione biosynthesis, is an incredibly useful supplement. Many of its benefits stem from the fact that it helps boost production of glutathione, an important antioxidant your body produces naturally that helps reduce free radical damage and plays a role in the detoxification of heavy metals and other harmful substances

NAC supports treatment of Chronic Obstructive Pulmonary Disease (COPD)

NAC regulates expression of a number of genes in the pathways that link oxidative stress to inflammation

xSpan Labs Guarantees High Quality N-Acetyl-Cysteine (NAC) capsules manufactured exclusively in the UK to GMP code of practice and ISO 9001, using only the finest quality raw materials in their highest grade and purest form so you receive a consistently high-quality product.

Our formulation is free from: ✘lactose, ✘gluten, ✘wheat, ✘soya, ✘yeast, ✘dairy, ✘GMOs.

Suitable for Vegetarians and Vegans.

Reviews

Rated 4.8 out of 5 stars.

4.8 | 12 reviews

12 reviews

Jane WhApr 14, 2021
Rated 4 out of 5 stars.
Promising
I've only been taking these for a few weeks but I'm feeling energetic and well despite having had a stressful period. So I'm hoping it's the NAC working. I'll know better in a few more weeks. But so far so good.
ElaineSep 08, 2021
Rated 5 out of 5 stars.
Make sure you swollen whole
I doc feel much better and I notice my chest is so much better, Make sure the capsules dont spilt in your mouth, OMG you wouldn't like the taste,
FreyaJan 24, 2023
Rated 5 out of 5 stars.
Good stuff
These are brilliant. I have been taking NAC for a while and these are the best ones I've tried. Well-priced, seem to be high quality and work well.
MMMJul 16, 2025
Rated 5 out of 5 stars.
Excellence supplement
I purchased this product on the recommendation of my gastroenterologist because I suffer from reflux.
David WilsonJun 26, 2021
Rated 5 out of 5 stars.
Good for removing chest mucus rapidly
This is an excellent product to rapidly remove mucus from the lungs during a very heavy cold.

N-Acetyl Cysteine ( NAC ) 600 mg 120 Capsules

Supplement Facts

Background

Reviews