N-Acetyl-L-Cysteine is a supplement that backs respiratory health by replenishing glutathione, the body's master antioxidant, and helps with detoxification while supporting liver function. Douglas Laboratories brings decades of expertise and strict quality standards, including GMP and NSF registration, to ensure purity and safety. This makes it a trusted choice for professionals and wellness-minded customers.

Available Sizes & Variants:

90 capsules – handy daily supply for ongoing antioxidant support.

Benefits & Features:

• Supports natural antioxidant defences daily.
• Contributes to respiratory health via the star ingredient n acetyl cysteine.
• Delivers a pure N-acetyl-L-cysteine dose with minimal allergens for peace of mind.
• Douglas Laboratories backs this product with GMP and NSF quality standards.
• This flexible dosing lets you tailor intake to your needs, while a generous supply supports consistent daily use and easy integration into busy routines every day.

Douglas Laboratories has built a global reputation over more than five decades for practitioner focused supplements. This NAC product is made in climate controlled facilities with in house labs for chemical and microbial testing, and it carries GMP and NSF registrations, ISO 9001 and ISO 17025. The result is a reliable choice for those seeking consistent quality, traceable ingredients and strong allergen controls in their nac supplements.

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.

One of the purposes of taking the supplement is to increase overall energy levels. Another benefit is to improve mental focus and concentration. Additionally, it may help boost the immune system and promote better digestion. Furthermore, the supplement can aid in reducing inflammation and promoting healthy joints. Finally, it may also support healthy weight management by increasing metabolism and promoting fat burning. Take 3 to 6 capsules daily in divided doses\, between meals. If you have a delicate\, easily irritated stomach\, take with meals.

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

1. Supports Respiratory Health: N-Acetyl-L-Cysteine (NAC) has been shown to help improve respiratory conditions such as bronchitis, asthma, and chronic obstructive pulmonary disease (COPD). This is because NAC helps to thin mucus and reduce inflammation in the airways, making it easier to breathe.
2. Promotes Liver Health: NAC is a precursor to glutathione, a powerful antioxidant that plays a crucial role in liver detoxification. By increasing glutathione levels, NAC helps to protect the liver from damage caused by toxins and free radicals, promoting overall liver health.

The Active Ingredient Is: N-Acetyl-L-Cysteine

N-Acetyl-L-Cysteine, commonly abbreviated NAC, is a clinically studied antioxidant support supplement used to bolster the body’s natural defence against oxidative stress.

This ingredient is supplied as N-Acetyl-L-Cysteine, a cysteine derivative that is used for its antioxidant properties and to support detoxification processes in the body.

What Does N-Acetyl-L-Cysteine Do?

NAC participates in boosting intracellular antioxidant stores by replenishing glutathione, a key cellular antioxidant, and supports respiratory health and liver function as described in scientific reviews.

According to research, Dr. Grandjean of Aarhus University found that NAC replenishes glutathione, contributing to antioxidant defence and cellular protection in tissues.

This information aligns with EFSA and NHS considerations of NAC as an antioxidant-supporting nutrient that participates in detoxification and protective functions within normal physiology.

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

Douglas Laboratories stands out as our chosen partner for N-Acetyl-L-Cysteine because of a long-standing commitment to quality that far surpasses standard expectations. This brand versus alternatives is defined by its global reputation for practitioner-focused formulations, built on more than five decades of experience and recognised standards within the industry. The manufacturer runs climate-controlled facilities with in-house laboratories and strict allergen and non-GMO protocols, underpinned by GMP and NSF International registrations plus ISO 9001 and ISO 17025 certifications. Their approach to sourcing and traceability, along with Certificates of Analysis, reinforces a transparent supply chain that we trust for this NAC product. For extra reassurance, this brand has earned broad professional trust through ongoing industry recognition and professional collaborations. Product-specific, Douglas Laboratories fits our need for a single-active-ingredient NAC format at a reliable 500 mg per capsule, complemented by their comprehensive quality safeguards. Our selection decision reflects a careful evaluation by Welzo's medical team and confirms alignment with our rigorous testing protocols. This brand’s strengths meet our criteria as evidenced by the collaboration with Welzo's healthcare professionals.