NAC N-Acetyl-L-Cysteine is a nutritional supplement that helps your body's antioxidant defences by replenishing glutathione in cells, keeping you steadier through everyday stress. Nutricology / Allergy Research Group is known for allergen free, single ingredient formulas and strict quality controls. This bottle reflects their care, clear labeling and strong testing, so you get reliable purity.

Available Sizes & Variants:

120 tablets NAC N-Acetyl-L-Cysteine - Single-ingredient formula designed for daily use.

Benefits & Features:

• Supports antioxidant defences with the key ingredient NAC.
• Replenishes glutathione to aid cellular detoxification and defend against oxidative stress.
• Designed for daily use as a straightforward nutritional supplement.
• Easy to take daily, quickly fitting into busy routines.
• NAC acts as a glutathione precursor, helping tissues stay resilient during daily stress while supporting liver detoxification and protection, mucous thinning, and overall cellular resilience.

Nutricology's NAC is a clean, single ingredient choice from the Allergy Research Group, designed for straightforward daily use. The key active ingredient, n acetylcysteine, is recognised as a glutathione precursor, supporting your body's antioxidant capacity. The brand's commitment to high standards shines through in cGMP manufacturing and batch testing, ensuring consistency and purity in every bottle. It’s a trusted name in nutritional supplements with a long history of quality.

Dicalcium phosphate, microcrystalline cellulose, magnesium stearate, silicon dioxide, stearic acid, croscarmellose sodium.

• GTIN: 713947713703
• Manufacturer: Nutricology
• Categories: Allergy Research GroupLung & Respiratory SupplementsN-Acetyl Cysteine (NAC) SupplementsNew ArrivalsNutricologyPopular Supplement Brands
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

The supplement may be taken as a dietary supplement, with one tablet to be consumed one to three times a day, or as advised by a healthcare professional. Adults: Take one capsule twice daily\, or as directed by your Health Care Practitioner. Best taken at least 15 minutes before or 2 hours after food.

Please consult the product packaging for accurate instructions on how to use the product.

1. Supports respiratory health: NAC is known to support respiratory health by helping to thin mucus and improve lung function, making it beneficial for individuals with chronic respiratory conditions such as asthma, bronchitis, and cystic fibrosis.
2. Boosts glutathione levels: NAC is a precursor to the antioxidant glutathione, which plays a crucial role in the body's detoxification processes. By increasing glutathione levels, NAC can help protect against oxidative stress and promote overall cellular health.

The Active Ingredient Is: N-Acetyl-L-Cysteine (NAC)

N-Acetyl-L-Cysteine is a supplement form of the amino acid L-cysteine and acts as a precursor to glutathione, a major cellular antioxidant. This product is a single-ingredient formula in line with allergen-free purity standards from reputable brands.

This form is provided as an NAC supplement and supports the body's antioxidant capacity through its role in glutathione synthesis. It is commonly used to support overall antioxidant defences and cellular detox pathways as outlined in quality and regulatory literature.

What Does N-Acetyl-L-Cysteine Do?

NAC helps replenish intracellular glutathione, supporting normal redox balance and detoxification processes as described in research and EFSA-style summaries. Dr. Millea of Johns Hopkins University found that NAC replenishes glutathione and supports antioxidant defences in cells.

Additionally, NAC is recognised as a mucolytic agent, breaking down mucus in respiratory contexts and aiding liver cell protection during toxin exposure, aligning with its documented mechanisms.

This product is not intended to diagnose, treat, cure, or prevent any disease.

Nutricology / Allergy Research Group stands out in our evaluation for its unwavering commitment to clean, single‑ingredient formulations crafted under rigorous manufacturing controls. This brand’s approach to quality is grounded in current Good Manufacturing Practices (cGMP) and meticulous batch testing, with clear emphasis on identity, purity and contamination controls that support consistent, safe products. This ensures a high level of reliability which our team recognises as essential for NAC products.

In the UK market, Nutricology / Allergy Research Group’s heritage as a trusted provider of allergen‑free, well‑defined ingredients aligns with Welzo’s standards for transparency and traceability. Their emphasis on compliant labelling and robust quality practices resonates with our own expectations, and we assess these factors through our medical team while also referencing the standards we enforce.

This brand is particularly well suited for NAC given its dedication to purity and consistent manufacturing practices, making Nutricology / Allergy Research Group a natural partner for this supplement. Our vetting process confirms the alignment between their quality standards and Welzo’s supplier criteria, reinforcing a strong, trusted collaboration.