What dose of N-Acetyl-L-Cysteine (NAC) is effective for Liver function?

N-Acetyl-L-Cysteine (NAC) at 1000 mg lands inside the studied 600-1200 mg window. DoseRank scores this product's dose fit at 82 out of 100.

Does DoseRank get paid to rank a product first?

No. Retailer links may be affiliate links, but rankings and placement are never paid. Every product is scored by the same public model, and the ranking is recomputed from the underlying product data rather than edited by hand.

The short answer · Liver function

Take n-acetyl-l-cysteine (nac) for liver function. This is the one to buy.

Q: How much does the best Liver function supplement cost?

NOW Foods, NAC, 1,000 mg, 120 Tablets works out at $0.15 per serving. $0.15 per serving — mid price tier for this outcome. The cheapest ranked pick here is $0.09 per serving.

NOW Foods, NAC, 1,000 mg, 120 Tablets

4.8· 21,148 ratings· $0.15/serving

DoseRank score86

N-Acetyl-L-Cysteine (NAC) 1000 mg — inside the studied 600-1200 mg window

Of 2,139 products scored for Liver function, NOW Foods, NAC, 1,000 mg, 120 Tablets ranks #1 with a DoseRank score of 86. N-Acetyl-L-Cysteine (NAC) is the strongest evidence signal for this outcome.

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Cheaper alternative$0.09 per servingNOW Foods, NAC, 600 mg, 250 Capsules

Retailer links may be affiliate links. Rankings and placement are never paid.

The form“Why N-Acetyl-L-Cysteine (NAC) — not Silymarin or Dandelion Root?”

N-Acetyl-L-Cysteine (NAC) is the strongest evidence signal for this outcome.

N-Acetyl-L-Cysteine (NAC)The pick
Strong evidence · 1000 mg
Sulfur-containing amino acid derivative that replenishes glutathione, the body's primary antioxidant; widely used for liver support, respiratory health, and as a mucolytic agent.
Silymarin
Strong evidence · 240 mg
The active flavonoid complex from milk thistle (Silybum marianum) and its main bioactive; supports liver cells by stabilizing membranes and acting as an antioxidant.
Dandelion Root
Limited evidence · 100 mg
Bitter root herb traditionally used as a gentle diuretic and liver tonic; a common ingredient in detox, kidney, and digestive support blends.

Buy the #1 pick

The dose“Is the dose actually effective?”

N-Acetyl-L-Cysteine (NAC) at 1000 mg lands inside the studied 600-1200 mg window.

N-Acetyl-L-Cysteine (NAC)

Studied window 600-1200 mg · this pick 1000 mg

The ranking“Why should I trust this pick?”

Strong trust signals — consistently high marks from verified buyer ratings. Each product gets a DoseRank score blending clinical strength, evidence, dose fit, trust and value. Retailer links may be affiliate links — the scoring model decides placement, never payment from a brand.

2,139 products scored
Never paid placement
Evidence level: Strong · 92
271 brands
18 ingredients

See the full analysis — every score, every product How the ranking works

The price“Can I do better than $0.15 a serving?”

$0.15 per serving — mid price tier for this outcome. The cheapest ranked pick here is $0.09 per serving.

10
Best Naturals, NAC, 600 mg, 250 CapsulesScore 84 · $0.09/serving
iHerb
2
NOW Foods, NAC, 600 mg, 250 CapsulesScore 85 · $0.09/serving
iHerb

Why not the absolute cheapest? The DoseRank score also weighs clinical strength, evidence, dose fit and trust — the very cheapest listings rarely hold up everywhere else.

Ready?

The #1 pick is $0.15 a serving.

NOW Foods, NAC, 1,000 mg, 120 Tablets — in stock at a tracked retailer.

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NOW Foods, NAC, 1,000 mg, 120 Tablets ranks #1 for Liver function with a DoseRank score of 86. The score blends clinical strength, evidence, dose fit, trust signals and value across 2,139 products scored for this outcome.

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