Default Title30-day supply
£5.00 · £5.00/bottle
Up to50%off
- One active ingredient
- Full label published
- Delivered monthly, cancel any time
- 30-day money-back guarantee
Sale · up to 50% off
Delivery protection
600 mg of N-acetyl L-cysteine in every capsule, 1,200 mg per daily serving. One active ingredient, nothing to hide.
- 600 mg N-acetyl L-cysteine per capsule, 1,200 mg per daily serving
- One active ingredient, full label published
- 60 vegetarian capsules per bottle, a 30-day supply
- Save up to 60% with Subscribe & save
- 30-day money-back guarantee on your first order, even if opened
Packaging note: we're rebranding, so your bottle may arrive in our older packaging rather than the design pictured. The capsules inside are exactly the same, and using up existing bottles keeps them out of landfill.
Pause, skip or cancel your subscription online at any time
- Secure checkout
- Free UK delivery over £50
- 30-day money-back guarantee
What is NAC?
NAC stands for N-acetyl L-cysteine, an acetylated form of the amino acid L-cysteine. It is the only active ingredient in our capsules.
Ingredients & allergens
N-acetyl L-cysteine (NAC), vegetable capsule (hydroxypropyl methylcellulose), microcrystalline cellulose, vegetable magnesium stearate, silicon dioxide.
Directions
Take 2 capsules a day on an empty stomach, with water. Do not exceed the recommended daily intake.
Subscription details
Subscribe and pay less: £25 for 1 bottle a month, £46 for 2 bottles a month (£23 a bottle), or £57 for 3 bottles a month (£19 a bottle). That's on top of our sale prices. Pause, skip or cancel online before your next order date.
Storage
Keep the lid closed and store in a cool, dry place out of direct sunlight. Keep out of reach of young children.
Food supplement. Do not exceed the recommended daily intake. Food supplements should not be used as a substitute for a varied and balanced diet and a healthy lifestyle. Keep out of reach of young children.
Delivery protection£5.00
Crimson Petal NAC
Up to 50% off, sitewide. Subscribe from £19 a bottle.
Every bottle is half price in our sale, and Subscribe & save takes up to a further 21% off, delivered every month. Skip, pause or cancel online whenever you like.
Shop nowProduct highlights
- One active ingredient
- Label published in full
- Subscribe from £19 a bottle
- 30-day money-back guarantee
- Cancel any time
One active ingredient. Nothing to hide.
Most labels are long. Ours isn't. Crimson Petal is N-acetyl L-cysteine in a vegetarian capsule, with the full label published for you to read.
- 1 active ingredient
- 1,200 mg NAC per daily serving
- £19 a bottle on Subscribe & save
Ingredient transparency
Everything in the capsule. Nothing left out.
This is the same information printed on the pack. If it’s in the capsule, it’s listed here.
- Full ingredients
N-acetyl L-cysteine (NAC), vegetable capsule (hydroxypropyl methylcellulose), microcrystalline cellulose, vegetable magnesium stearate, silicon dioxide.
- Allergen information
- None of the 14 major allergens appear in the ingredients list.
Nutrition information
Per daily serving (2 capsules)| Ingredient | Amount |
|---|---|
| N-acetyl L-cysteine (NAC)600 mg per capsule | 1,200 mg |
Serving size: 2 vegetarian capsules. 60 capsules per bottle.
Subscribe vs. one-time
Same capsules either way. Subscribing just costs less and turns up on time.
| Feature | Subscribe & save | One-time |
|---|---|---|
| Price per bottle | From £19 | From £24 |
| Arrives as you run low | Yes | No |
| Skip or pause a delivery | Yes | No |
| Cancel online, any time | Yes | Nothing to cancel |
| Same capsules, same label | Yes | Yes |
Directions
How to take it
-
Take 2 capsules a day
One daily serving is 2 vegetarian capsules (1,200 mg NAC). Do not exceed the recommended daily intake.
-
On an empty stomach
Swallow with water on an empty stomach, as suggested on the label.
-
Store it well
Keep the lid closed and store in a cool, dry place out of direct sunlight.
Before you take it
- Do not exceed the recommended daily intake of 2 capsules.
- Food supplements should not be used as a substitute for a varied and balanced diet and a healthy lifestyle.
- Keep out of reach of young children.
- If you are pregnant, breastfeeding, taking medication or under medical supervision, speak to your doctor before use.
Find your supply
Same capsules, three sizes. Bigger packs cost less per day.
Delivery & returns
Tracked to your door. Simple if it isn’t right.
Delivery
| Service | Arrives | Cost |
|---|---|---|
| UK tracked | 9–14 days (estimated) | £2.99 · free over £50 |
| International tracked: Australia, New Zealand, USA, Canada | 10–17 days (estimated) | Shown at checkout |
| Delivery protection (optional) | Lost, stolen or damaged parcels replaced or refunded | £5, add it in your bag |
We deliver to the UK, Australia, New Zealand, the USA and Canada. Estimated delivery is 9–14 days in the UK and 10–17 days to Australia, New Zealand, the USA and Canada, from when your order is placed. Add delivery protection in your bag for £5 to have lost, stolen or damaged parcels replaced or refunded.
Returns
30-day money-back guarantee. Not happy with your first order? Email us within 30 days of delivery and we’ll refund the price you paid for the product, even if you’ve opened it. You don’t need to send it back. The guarantee covers your first order, including the first order of a subscription, with one guarantee refund per customer.
You can also cancel any order within 14 days of receiving it and return unopened products with the seal intact for a refund.
If your order arrives damaged or faulty, contact us as soon as possible and we’ll replace or refund it, including delivery costs.
To start a return, email customerservice@crimsonpetallabs.com with your order number.
What is NAC?
NAC stands for N-acetyl L-cysteine, an acetylated form of the amino acid L-cysteine. It is the only active ingredient in our capsules.
What’s in each capsule?
Each vegetarian capsule contains 600 mg of N-acetyl L-cysteine (NAC). A daily serving is 2 capsules, which provides 1,200 mg. Full ingredients: N-acetyl L-cysteine (NAC), vegetable capsule (hydroxypropyl methylcellulose), microcrystalline cellulose, vegetable magnesium stearate, silicon dioxide. The full label is on our ingredients page.
Do I have to subscribe?
No, it's your choice. Buy once (sale prices: £30 for 1 bottle, £56 for 2 or £72 for 3) or subscribe and pay even less: £25 for 1 bottle a month, £46 for 2 bottles a month (£23 a bottle), or £57 for 3 bottles a month (£19 a bottle). Pause, skip or cancel any time from your account before your next order date.
Why does my bottle look different from the pictures?
We're rebranding. While we do, some orders will arrive in our older packaging rather than the design pictured on the website. The capsules inside are exactly the same. Using up our existing bottles keeps them out of landfill instead of throwing them away.
Can NAC treat or prevent a health condition?
We don’t make health or medical claims. There are currently no authorised health claims for NAC in Great Britain, so we only tell you what is in the product and how to take it. If you have questions about your health, please speak to your GP or pharmacist.
Who shouldn’t take it?
Speak to your doctor or pharmacist before taking any food supplement if you are pregnant, breastfeeding, taking medication or under medical supervision. Keep out of reach of young children.
Can I return it?
Yes. Your first order comes with a 30-day money-back guarantee: if you’re not happy, email us within 30 days of delivery and we’ll refund the price you paid for the product, even if the bottle is opened. You don’t need to send it back. You can also cancel any order within 14 days of receiving it and return unopened products with the seal intact. Damaged or faulty items are always replaced or refunded.