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Cheapest N-Acetyl-L-Cysteine on iHerb

Ranked by real cost per 1,000 mg of N-Acetyl-L-Cysteine — cheapest value first.

Prices updated Jul 25, 2026 · 25 products · Prices in USD

The priciest option here costs about 4.6× more per 1,000 mg of N-Acetyl-L-Cysteine than the best-value pick Nutricost. For the same daily dose, choosing by cost per unit instead of sticker price can meaningfully cut your yearly spend.
#ProductDoseServingsPrice (USD)Cost per 1,000 mg
1
Nutricost, NAC, Unflavored, 17.9 oz (500 g)
Nutricost, NAC, Unflavored, 17.9 oz (500 g)
Nutricost
1,200 mg41739.950.080View on iHerb →
2
Nutricost, NAC, Unflavored , 8.9 oz (250 g)
Nutricost, NAC, Unflavored , 8.9 oz (250 g)
Nutricost
1,200 mg20824.950.100View on iHerb →
3
Nutricost, NAC, 1,000 mg, 240 Tablets
Nutricost, NAC, 1,000 mg, 240 Tablets
Nutricost
1,000 mg24026.950.112View on iHerb →
4
Amazing Nutrition, NAC, 250 Capsules (600 mg per Capsule)
Amazing Nutrition, NAC, 250 Capsules (600 mg per Capsule)
Amazing Nutrition
1,200 mg12521.990.147View on iHerb →
5
Nutricost, NAC, 1,000 mg, 120 Tablets
Nutricost, NAC, 1,000 mg, 120 Tablets
Nutricost
1,000 mg12017.950.150View on iHerb →
6
NutraBio, NAC, 5.3 oz (150 g)
NutraBio, NAC, 5.3 oz (150 g)
NutraBio
600 mg25023.990.160View on iHerb →
7
NOW Foods, NAC Pure Powder, 4 oz (113 g)
NOW Foods, NAC Pure Powder, 4 oz (113 g)
NOW Foods
600 mg18818.360.163View on iHerb →
8
Best Naturals, NAC, 600 mg, 250 Capsules
Best Naturals, NAC, 600 mg, 250 Capsules
Best Naturals
600 mg25024.550.164View on iHerb →
9
EVLution Nutrition, NAC, 600 mg, 60 Veggie Capsules
EVLution Nutrition, NAC, 600 mg, 60 Veggie Capsules
EVLution Nutrition
600 mg606.230.173View on iHerb →
10
Nutricost, NAC, Vegan N-Acetyl L-Cysteine, 600 mg, 180 Capsules
Nutricost, NAC, Vegan N-Acetyl L-Cysteine, 600 mg, 180 Capsules
Nutricost
600 mg18018.950.176View on iHerb →
11
Force Factor, Fundamentals, NAC, N-Acetyl-L-Cysteine, 600 mg, 200 Vegetable Capsules
Force Factor, Fundamentals, NAC, N-Acetyl-L-Cysteine, 600 mg, 200 Vegetable Capsules
Force Factor
600 mg20021.490.179View on iHerb →
12
Nutricost, NAC, 600 mg, 240 Capsules
Nutricost, NAC, 600 mg, 240 Capsules
Nutricost
600 mg24026.950.187View on iHerb →
13
Toniiq, NAC, 240 Capsules (650 mg per Capsule)
Toniiq, NAC, 240 Capsules (650 mg per Capsule)
Toniiq
1,300 mg12029.970.192View on iHerb →
14
Primaforce, NAC, 600 mg, 150 Capsules
Primaforce, NAC, 600 mg, 150 Capsules
Primaforce
600 mg15017.990.200View on iHerb →
15
Vitamatic, NAC + Milk Thistle, 120 Vegetable Capsules
Vitamatic, NAC + Milk Thistle, 120 Vegetable Capsules
Vitamatic
1,200 mg6014.990.208View on iHerb →
16
Doctor's Best, NAC Detox Regulators, 180 Veggie Caps
Doctor's Best, NAC Detox Regulators, 180 Veggie Caps
Doctor's Best
600 mg18023.990.222View on iHerb →
17
California Gold Nutrition, N-Acetyl-L-Cysteine with Molybdenum and Selenium, 120 Veggie Capsules
California Gold Nutrition, N-Acetyl-L-Cysteine with Molybdenum and Selenium, 120 Veggie Capsules
California Gold Nutrition
600 mg12016.970.236View on iHerb →
18
Metabolic Nutrition, NAC, 90 Capsules (650 mg per Capsule)
Metabolic Nutrition, NAC, 90 Capsules (650 mg per Capsule)
Metabolic Nutrition
650 mg9013.990.239View on iHerb →
19
Hi Tech Pharmaceuticals, NAC, 600 mg, 100 Capsules
Hi Tech Pharmaceuticals, NAC, 600 mg, 100 Capsules
Hi Tech Pharmaceuticals
600 mg10014.950.249View on iHerb →
20
Doctor's Best, NAC Detox Regulators, 60 Veggie Caps
Doctor's Best, NAC Detox Regulators, 60 Veggie Caps
Doctor's Best
600 mg609.990.278View on iHerb →
21
NaturesPlus, Pro NAC 1200, Sustained Release, 60 Tablets (600 mg Per tablet)
NaturesPlus, Pro NAC 1200, Sustained Release, 60 Tablets (600 mg Per tablet)
NaturesPlus
1,200 mg3011.010.306View on iHerb →
22
NaturesPlus, Pro, NAC 1200, 60 Capsules (600 mg per Capsule)
NaturesPlus, Pro, NAC 1200, 60 Capsules (600 mg per Capsule)
NaturesPlus
1,200 mg3011.010.306View on iHerb →
23
ProHealth Longevity, Pure N-Acetyl Cysteine, 600 mg, 120 Capsules
ProHealth Longevity, Pure N-Acetyl Cysteine, 600 mg, 120 Capsules
ProHealth Longevity
600 mg12022.950.319View on iHerb →
24
MaryRuth's, NAC, 120 Capsules (500 mg per Capsule)
MaryRuth's, NAC, 120 Capsules (500 mg per Capsule)
MaryRuth's
1,000 mg6019.950.333View on iHerb →
25
NutraBio, NAC, 600 mg, 90 Veggie Capsules
NutraBio, NAC, 600 mg, 90 Veggie Capsules
NutraBio
600 mg9019.990.370View on iHerb →

How we rank N-Acetyl-L-Cysteine

Two supplements can list the same dose per serving yet cost very differently once you account for how many servings are in the bottle. We calculate the total nutrient in each container (dose per serving × servings per container), divide the current price by that total, and rank by the resulting cost per unit. Lower is better. Because prices are refreshed automatically, this ranking reflects today's iHerb pricing rather than a snapshot from months ago.

Cost per unit is a starting point, not the whole story — the ideal form, third-party testing, and other ingredients matter too. Always check the label and consult a healthcare professional before starting a supplement.

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Prices update automatically and may differ from iHerb at checkout. Rankings are based on cost per unit of the listed nutrient and are for informational purposes only — not medical advice. Links to iHerb are affiliate links.