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Amino acids & derivativesVegan

N-Acetyl-L-Cysteine (NAC), 90 capsules

£18.38 for 90 capsules at Healf. That works out at 25p per 600 mg, which ranks it 15th of the 28 N-Acetyl Cysteine NAC products we price across 5 UK retailers.

What it really costs, per 600 mg25pOne 600 mg dose is our comparison unit for N-Acetyl Cysteine. It is not a recommendation.

A day25p

A week£1.72

A month£7.35

A year£89.45

At one 600 mg dose a day, this pack lasts 2 months. A month is 30 days, so twelve of them is not quite a year.

How we worked it out

Servings: 90 ÷ 1 per serving = 90
In the pack: 90 × 500 mg = 45 g
£18.38 ÷ 45 g × 600 mg = 24.5p per 600 mg
A week 24.5p × 7 = £1.72 · a month × 30 = £7.35 · a year × 365 = £89.45
Amount per serving: stated on the label.

The standard dose is a comparison unit, not a recommendation. Always confirm the price on the retailer's site. How we compare everything.

Cheaper N-Acetyl Cysteine NAC

All 28, ranked →

Nac-Acetyl Cysteine 600mgHealf · 600 mg a serving · £3.41 a month · a pack lasts 8 months11p£28.45View at Healf

N-Acetyl-L-CysteineHealf · 600 mg a serving · £4.59 a month · a pack lasts 2 months15p£9.17View at Healf

PRO NAC 600 MGHealf · 600 mg a serving · £5.69 a month · a pack lasts 2 months19p£11.38View at Healf

NAC (N-Acetyl-L-Cysteine)Healf · 500 mg a serving · £5.78 a month · a pack lasts 2 months19p£14.45View at Healf

Designs for HealthN-Acetyl-L-CysteineHealf · 900 mg a serving · £7.00 a month · a pack lasts 6 months23p£41.99View at Healf

This productHealf · 500 mg a serving · £7.35 a month · a pack lasts 2 months25pshown above

Switching to the Healf pack saves £3.94 a month at the same 600 mg dose.

Ranked purely by price per 600 mg. 44 combination products also contain N-Acetyl Cysteine.

On the label

N-Acetyl Cysteine · NAC: 500 mg per serving (stated on the label)
Pack: 90 capsules · 90 servings · 1 capsule(s) a serving
Cost per serving: 20p (90 servings in the pack)

More label details

Claimed on the listing: vegan
Sold by: Healf
What the listing says: “90 caps” · “Each capsule typically contains:” · “N-Acetyl-L-Cysteine (NAC) ; 500 mg”

Ingredients

N-Acetyl-L-Cysteine (NAC). Encapsulated with: Hydroxypropyl methylcellulose, Cellulose, Stearic acid.

From the Healf listing. Check the pack itself if you have an allergy: labels mark allergens in bold.

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Daily dosemgFordays

One 600 mg dose is our comparison unit, not a recommendation.

Price history

2 price changes since 1 October 2026. Checked on 20 days, most recently 20 October 2026.

Lowest recorded: £18.388 Oct
Highest recorded: £25.991 Oct
First recorded: £25.991 Oct
Checked on: 20 dayssince 1 Oct

Pack price at each check.

8 Oct Down at Healf: £20.79 → £18.38 (−12%)
2 Oct Down at Healf: £25.99 → £20.79 (−20%)
1 OctFirst checked at Healf: £25.99

Questions about this product

How much does Metagenics N-Acetyl-L-Cysteine (NAC) cost per 600 mg?

25p per 600 mg, from £18.38 for 90 capsules at Healf, checked on 20 October 2026.

Is it the cheapest N-Acetyl Cysteine NAC in the UK?

No, it is 15th of 28. N Acetyl L Cysteine (NAC) at Bulk works out at 4p per 600 mg.

How long does one pack last?

2 months at one 600 mg dose. The pack holds 45 g in total.

About Metagenics

All 126 Metagenics products, priced per dose

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