N-Acetyl-L-Cysteine 500mg x 90 capsules
Suggested use
Daily dose
Take 1 to 2 capsules daily, or as directed by a healthcare professional
Do not exceed the recommended daily intake
Commonly taken with
Frequently asked questions
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NAC is a stable, supplemental form of the amino acid L-cysteine. It is a precursor to glutathione, one of the body's primary antioxidants, which plays a key role in cellular defence against oxidative stress.
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NAC contains a sulphur group, which gives it a naturally distinctive odour. This is completely normal and is not an indication of poor quality or spoilage. The smell is inherent to the compound itself.
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Each bottle contains 90 capsules. At the suggested use of 1 capsule per day, this provides a 90-day supply.
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Each capsule contains NAC and a small amount of rice flour, which is used to aid filling. The capsule shell is HPMC, a plant-derived vegetarian cellulose. No binders, bulking agents, or flow agents are added.
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If you are taking any prescription medication, including nitroglycerin, activated charcoal, or immunosuppressants, consult your doctor or pharmacist before use. NAC may interact with certain medications.
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Yes. The capsule shell is made from HPMC (hydroxypropyl methylcellulose), a plant-derived material. There are no animal-derived ingredients anywhere in the formula.
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This product does not contain any of the 14 major allergens listed under UK food labelling regulations. It is manufactured in a facility that handles a range of ingredients, so if you have a severe allergy, please contact us before purchasing.
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We recommend consulting your GP or midwife before taking any food supplement during pregnancy or breastfeeding. This applies to all supplements, not just this product.
Description
Health Leads N-Acetyl-L-Cysteine 500mg provides NAC in a simple, one-a-day vegetable capsule.
N-Acetyl-L-Cysteine, commonly known as NAC, is a stable supplemental form of the amino acid L-cysteine. L-cysteine is a sulphur-containing amino acid and is involved in the body’s natural production of glutathione, a naturally occurring compound found within cells.
NAC has become a widely used food supplement for those looking to include a supplemental source of N-Acetyl-L-Cysteine as part of a varied, balanced diet and healthy lifestyle.
Each capsule provides:
• N-Acetyl-L-Cysteine (NAC) — 500mg
Other ingredients: Rice flour and HPMC vegetable capsule shell.
Rice flour is used in a small amount as a functional filler to support consistent capsule filling and accurate dosing. It is not included as an active ingredient and no nutritional benefit is claimed from its presence.
At Health Leads, we focus on straightforward formulations and avoid unnecessary processing aids and additives wherever possible. This product contains no magnesium stearate, no artificial colours, no artificial sweeteners and no hydrogenated oils.
Why Does NAC Have a Sulphur Smell?
NAC is a sulphur-containing compound and naturally has a distinctive sulphur-like odour. This is completely normal and is not an indication of poor quality or spoilage. The smell may become more noticeable when the bottle is opened or after the product has been stored for a period of time.
Suitable for vegetarians and vegans.
Each pack contains 90 capsules, providing a 90-day supply when taken at the suggested intake of one capsule daily.
Safety Information
If you are taking prescription medication, including nitroglycerin, activated charcoal or immunosuppressant medication, consult a doctor, pharmacist or qualified healthcare professional before using this product.
If you have a medical condition, are pregnant or breastfeeding, or are under medical supervision, seek professional advice before use.
Do not exceed the recommended daily intake. Discontinue use if you experience an adverse reaction.
Food supplements should not be used as a substitute for a varied, balanced diet and healthy lifestyle.
Store in a cool, dry place away from direct sunlight. Keep out of reach of children.
Made in Wales by Health Leads, a family business pioneering additive-free supplements since 1998.
More Information
- SKU
- 0601
- GTIN (EAN)
- 5060332051038
- Strength
- 500mg
- Capsule amount
- 90
- High Strength
- No
- Featured
- No
Reviews
Delivery & Returns
DELIVERY
Most orders are sent by either 1st class Royal Mail or if requested by Couier.
We aim to dispatch orders received before 1.00pm (UK time) on the same day, excluding weekends and national holidays.
RETURNS
If you have changed your mind about keeping an item we understand and we happily accept returns within 30 days, as long as the item is unopened and returned in original condition we are happy to provide a full refund for the item or exchanged for goods of the same value. Please note that due to the hygienic nature of some oral and body care products we are unable to accept items back where the packaging seal has been breached. If you have received a faulty item or an item in error, we will see to it that you receive the correct item at no extra cost. Please use the "contact us" page and we will be happy to help.

