Free UK delivery for orders over £50
365 Day Returns
£20 off orders over £100 – code APR20
Free UK delivery for orders over £50
365 Day Returns
£20 off orders over £100 – code APR20
Free UK delivery for orders over £50
365 Day Returns
£20 off orders over £100 – code APR20
Free UK delivery for orders over £50
365 Day Returns
£20 off orders over £100 – code APR20
Free UK delivery for orders over £50
365 Day Returns
£20 off orders over £100 – code APR20
Free UK delivery for orders over £50
365 Day Returns
£20 off orders over £100 – code APR20
Free UK delivery for orders over £50
365 Day Returns
£20 off orders over £100 – code APR20

N-Acetyl-L-Cysteine

A powerful 600 mg NAC supplement that supports liver function, immunity, and long health while boosting glutathione, the body's master antioxidant.

size:

60 caps

£9.89
Free sample each month
Pause or cancel anytime
365 day free returns
Back in stock: 14/04/2025

Buy now, pay later from £2.75/mo with

Free UK shipping over £50, free returns.
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Key Benefits

  • Supports liver detoxification and function.

  • Promotes lung and respiratory health.

  • Protects against oxidative stress and boosts immunity.

N-Acetyl-L-Cysteine (NAC) is a highly absorbable form of cysteine, an amino acid essential for producing glutathione—one of the body's most powerful antioxidants. Glutathione helps neutralise free radicals, reducing oxidative stress and supporting overall health. NAC also promotes healthy liver function by aiding detoxification and supports lung health by thinning mucus in the airways, making breathing easier. Additionally, it plays a key role in immune defence, helping to protect cells from damage and maintain a balanced inflammatory response.

Life Extension’s NAC supplement delivers 600 mg of this essential nutrient in each capsule. Sourced for high bioavailability, it ensures optimal absorption and effectiveness. This formula is designed to replenish glutathione levels, helping to combat daily environmental stressors while supporting long-term wellness.

For over 40 years, Life Extension has been advancing nutritional science, driven by the belief that a healthier and longer life is within everyone's reach. Its diverse team of acclaimed doctors and practitioners specialising in preventative medicine, cutting-edge scientists, researchers, lab technicians, naturopaths, nutritionists, nurses, and wellness specialists are dedicated to helping individuals navigate their journey toward lifelong health, wellness, and vitality. Offering more than 400 vitamins and supplements across 40+ health categories, Life Extension empowers people to achieve their health goals with the best that science has to offer.

With our Healf Curation Process, we do the work for you. Shop with confidence knowing that every item has been tried, tested, and curated for you.

Learn more about each step—Brand Discovery, Expert Validation, and Community Testing—here.

N-acetyl-L-cysteine.

Other ingredients: vegetable cellulose (capsule), vegetable stearate, silica.

Non-GMO.

Shipping

At Healf, we prioritize safe and fast delivery for all our customers. Our carefully selected couriers are Royal Mail and DPD.

UK standard delivery

Enjoy free standard delivery on orders above £50, this option usually requires 2-3 working days. If your order is under £50, this delivery option is available for £3.99.

Next working day

For when you need our products urgently, we offer next working day shipping for £5.99. For orders placed before 12.00, we will ship it the same day to ensure you receive your order the next working day.

International

International deliveries can take 7 working days, and up to 4 weeks. The cost is £22.99 for orders below £50, £49.95 for orders above.

Returns

If for any reason you are not satisfied with your order, we provide free 365-day UK returns for all our customers. To initiate your return, simply contact us at team@healf.com, and we'll send you a return slip and help arrange a collection. The item you return must be sent in the same condition as received and inside the original packaging. Once received, we will notify you via email.

For international returns, we unfortunately do not cover the cost. However, we work with an array of carriers and can offer self-posting returns for customers shopping from outside the UK.

Take one (1) capsule one to three times daily, or as recommended by a healthcare practitioner.

Warnings
KEEP OUT OF REACH OF CHILDREN
DO NOT EXCEED RECOMMENDED DOSE
Do not purchase if outer seal is broken or damaged.
When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.

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Frequently asked questions

Our main focus here at Healf is to make sure you are getting access to the best global wellbeing brands that align with our core values, where we believe wellbeing is characterized by The Four Pillars - EAT, MOVE, MIND, SLEEP. We hand select products all over the world and put them through our strict three step curation process which entails discovery, expert validation, and our community testing. In order to protect our community we always quality check all ingredients of the products we select, and do not feature products with any ingredients we mention on our Healf Banned Ingredient List.

Our team of in-house experts stay up to date with the latest research on wellbeing. They constantly evaluate health trends and make sure to filter real vs. faux and deeply understand that there truly is no ‘one size fits all’ approach to your wellbeing. You can check the Healf journal here and make sure to subscribe to our mailing list for more content.

We love people who check ingredients. You’ll find detailed information about the ingredients in every product page and if you find something you’d like to flag with us or have more questions, drop us a message.

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Healf Curation
Process™

Every product undergoes our rigorous Healf Curation Process, ensuring you are always getting the best when it comes to your wellbeing.

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The Discovery

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Our approach keeps us at the forefront of wellbeing. With our global network of health professionals and AI-powered trend analysis, we curate the leading supplements, tools, and tech that pioneer the industry.

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Expert Validation

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Each product at Healf is carefully examined by a panel of industry specialists—including dieticians, personal trainers, psychologists, and sleep experts—to ensure it meets our high standards for quality, efficacy, and ingredient formulations.

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Community Testing

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By collaborating with a dedicated group of customers who test and review each product, we ensure that only those truly beneficial to your wellbeing are offered here at Healf.