We earn commission on purchases made through our links. It never affects ranking: tables are ordered purely by price per dose, and no retailer or brand can pay for position.We earn commission when you buy through our links. It never affects the ranking. Full disclosure.

Amino acids & derivatives

N-Acetyl-Cysteine (NAC) 1000 MG, 120 tablets

£21.99 for 120 tablets at Healf. That works out at 11p per 600 mg, which ranks it 8th of the 28 N-Acetyl Cysteine NAC products we price across 5 UK retailers.

What it really costs, per 600 mg11pOne 600 mg dose is our comparison unit for N-Acetyl Cysteine. It is not a recommendation.

A day11p

A week77p

A month£3.30

A year£40.13

At one 600 mg dose a day, this pack lasts 7 months. A month is 30 days, so twelve of them is not quite a year.

How we worked it out

Servings: 120 ÷ 1 per serving = 120
In the pack: 120 × 1 g = 120 g
£21.99 ÷ 120 g × 600 mg = 11p per 600 mg
A week 11p × 7 = 77p · a month × 30 = £3.30 · a year × 365 = £40.13
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 →

N Acetyl L Cysteine (NAC)Bulk · 700 mg a serving · £1.80 a month · a pack lasts 5 months6p£9.99View at Bulk

VitaBrightNAC (N Acetyl Cysteine)VitaBright · 600 mg a serving · £2.50 a month · a pack lasts 2 years8p£59.97View at VitaBright

VitaBrightNAC (N Acetyl Cysteine)VitaBright · 600 mg a serving · £2.67 a month · a pack lasts 1.5 years9p£47.99View at VitaBright

WeightWorldN-Acetyl Cysteine CapsulesWeightWorld · 600 mg a serving · £2.75 a month · a pack lasts 6 months9p£16.48View at WeightWorld

VitaBrightNAC (N Acetyl Cysteine)VitaBright · 600 mg a serving · £2.83 a month · a pack lasts 12 months9p£33.99View at VitaBright

This productHealf · 1 g a serving · £3.30 a month · a pack lasts 7 months11pshown above

Switching to the Bulk pack saves £1.50 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: 1 g per serving (stated on the label)
Pack: 120 tablets · 120 servings · 1 tablet(s) a serving
Cost per serving: 18p (120 servings in the pack)

More label details

Claimed on the listing: vegetarian
Sold by: Healf
What the listing says: “120 tabs” · “Servings Per Container: 120” · “Serving Size: 1 Tablet” · “N-Acetyl Cysteine (NAC) (1 g) ; 1000 mg”

Is something wrong? Tell us

Add to your basket

View basket

Your basket prices everything you take together: whole packs, delivery included, from as few websites as you like.

Daily dosemgFordays

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

Price history

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

Lowest recorded: £19.991 Oct
Highest recorded: £21.9917 Oct
First recorded: £19.991 Oct
Checked on: 20 dayssince 1 Oct

Pack price at each check.

17 Oct Up at Healf: £19.99 → £21.99 (+10%)
1 OctFirst checked at Healf: £19.99

Questions about this product

How much does NOW Foods N-Acetyl-Cysteine (NAC) 1000 MG cost per 600 mg?

11p per 600 mg, from £21.99 for 120 tablets at Healf, checked on 20 October 2026.

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

No, it is 8th of 28. N Acetyl L Cysteine (NAC) at Bulk works out at 4p per 600 mg.

How long does one pack last?

7 months at one 600 mg dose. The pack holds 120 g in total.

About NOW Foods

All 109 NOW Foods products, priced per dose

Keep comparing

All N-Acetyl CysteineEvery form, cheapest per 600 mg first N-Acetyl Cysteine guideWhat it is, why people take it, how the forms differ NOW FoodsAll 109 products from this brand, per dose Amino acids & derivativesEverything else we price in this category N-Acetyl Cysteine price historyEvery N-Acetyl Cysteine product's price per dose and price history Build a basketThe cheapest way to buy several at once How we compareWhere every number on this page comes from