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Home › Amino acids & derivatives › N-Acetyl Cysteine

NOW FoodsAmino acids & derivatives

Nac-Acetyl Cysteine 600mg, 250 capsules

£28.45 for 250 capsules at Healf. That works out at 11p per 600 mg, which ranks it 10th 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 week80p
A month£3.41
A year£41.54

At one 600 mg dose a day, this pack lasts 8 months. A month is 30 days, so twelve of them is not quite a year.

How we worked it out

N-Acetyl Cysteine

  • Servings: 250 ÷ 1 per serving = 250
  • In the pack: 250 × 600 mg = 150 g
  • £28.45 ÷ 150 g × 600 mg = 11.4p per 600 mg
  • A week 11.4p × 7 = 80p · a month × 30 = £3.41 · a year × 365 = £41.54
  • Amount per serving: stated on the label.

Selenium

  • Servings: 250 ÷ 1 per serving = 250
  • In the pack: 250 × 25 µg = 6.25 mg
  • £28.45 ÷ 6.25 mg × 100 µg = 45.5p per 100 µg selenium
  • A week 45.5p × 7 = £3.19 · a month × 30 = £13.66 · a year × 365 = £166.15
  • 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 →
VitaBrightNAC (N Acetyl Cysteine)VitaBright · 600 mg a serving · £2.67 a month · a pack lasts 1.5 years9p£47.99View at VitaBright (opens in a new tab)
WeightWorldN-Acetyl Cysteine CapsulesWeightWorld · 600 mg a serving · £2.75 a month · a pack lasts 6 months9p£16.48View at WeightWorld (opens in a new tab)
VitaBrightNAC (N Acetyl Cysteine)VitaBright · 600 mg a serving · £2.83 a month · a pack lasts 12 months9p£33.99View at VitaBright (opens in a new tab)
N-Acetyl-Cysteine (NAC) 1000 MGHealf · 1 g a serving · £3.30 a month · a pack lasts 7 months11p£21.99View at Healf (opens in a new tab)
VitaBrightNAC - N-Acetyl Cysteine 600mg 180 x Vegan Capsules - Max Strength - 1 BottleVitaBright · 600 mg a serving · £3.33 a month · a pack lasts 6 months11p£19.99View at VitaBright (opens in a new tab)
This productHealf · 600 mg a serving · £3.41 a month · a pack lasts 8 months11pshown above

Switching to the VitaBright pack saves 75p a month at the same 600 mg dose.

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

How it compares: selenium selenomethionine

All 10, ranked →
SeleniumCheapest per 100 µg seleniumHealf · 200 µg a serving · 93p a month · a pack lasts 12 months3p£11.19View at Healf (opens in a new tab)
SeleniumHealf · 200 µg a serving · 96p a month · a pack lasts 6 months3p£5.78View at Healf (opens in a new tab)
Liposomal SeleniumHealf · 200 µg a serving · £1.89 a month · a pack lasts 12 months6p£22.63View at Healf (opens in a new tab)
This productHealf · 25 µg a serving · £13.66 a month · a pack lasts 2 months46pshown above

Ranked purely by price per 100 µg selenium. 80 combination products also contain selenium.

On the label

N-Acetyl Cysteine · NAC
600 mg per serving (stated on the label)
Selenium · Selenomethionine
25 µg per serving (stated on the label)
Pack
250 capsules · 250 servings · 1 capsule(s) a serving
Cost per serving
11p (250 servings in the pack)
More label details
Sold by
Healf
What the listing says
“250 vcaps” · “Servings Per Container: 250” · “Serving Size: 1 Capsule” · “N-Acetyl Cysteine (NAC) ; 600 mg”
Ingredients

N-Acetyl Cysteine (NAC), Selenium (Elemental) (From L-Selenomethionine), Capsule Shell (Hypromellose), Anti-Caking Agent (Stearic Acid (Vegetable Source)), Acidity Regulator (Citric Acid), Bulking Agent (Microcrystalline Cellulose)

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

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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
£25.991 Oct
Highest recorded
£28.9916 Oct
First recorded
£25.991 Oct
Checked on
20 dayssince 1 Oct
Pack price at each check.
  1. Down at Healf: £28.99 → £28.45 (−1.9%)
  2. Up at Healf: £25.99 → £28.99 (+12%)
  3. First checked at Healf: £25.99

Questions about this product

How much does NOW Foods Nac-Acetyl Cysteine 600mg cost per 600 mg?

11p per 600 mg, from £28.45 for 250 capsules at Healf, checked on 20 October 2026.

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

No, it is 10th of 28. N Acetyl L Cysteine (NAC) at Bulk works out at 4p per 600 mg.

How long does one pack last?

8 months at one 600 mg dose. The pack holds 150 g in total.

How much does NOW Foods Nac-Acetyl Cysteine 600mg cost per 100 µg selenium?

46p per 100 µg selenium, from £28.45 for 250 capsules at Healf, checked on 20 October 2026.

How long does one pack last?

2 months at one 100 µg dose. The pack holds 6.25 mg in total.

About NOW Foods

All 109 NOW Foods products, priced per dose

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