For liver support and glutathione replenishment, this delivers 600mg of **N-Acetyl-L-Cysteine** per capsule — the minimum clinically studied dose. The label suggests one to three capsules daily, which puts your intake at 600–1,800mg — covering the full range used in research on liver health, respiratory support, and glutathione replenishment.

At the recommended two-capsule dose, you're at 1,200mg — the sweet spot used in the majority of clinical trials. NAC is your body's most direct route to restoring glutathione, the antioxidant that drives liver detoxification and protects cells from oxidative damage.

NAC is best absorbed on an empty stomach, and if you're taking two or three capsules daily, splitting your doses (morning and evening) may improve tolerability. The label also recommends drinking plenty of water alongside supplementation.

BioStacks
Life Extension

N-Acetyl-L-Cysteine 600 mg

1 Capsule · 60 servings · $0.20/serving

iHerbAmazon

Best for

Liver

Ingredients (1)

N-Acetyl-L-Cysteine

100%

Dose

600 mg

Target

600–1800 mg

Form

—

Other Ingredients (3)

Silicon DioxideAnti-caking

Fine silica powder used to prevent clumping

Vegetable StearateLubricant

A plant-derived salt of stearic acid (typically magnesium or calcium) used as a tablet lubricant

Microcrystalline CelluloseBinder

Plant-derived cellulose used as a binder and filler in supplements

How to Take It

Take it anytime

Best absorbed between meals, away from food.

On an empty stomach

On the label

Read the entire label and follow the directions carefully prior to use. Directions: Take one (1) capsule one to three times daily, or as recommended by a healthcare practitioner.

General guidance based on the ingredients, not a substitute for the label or your doctor.

Price Check

$12.00

$10$20$50

Cheaper than 92% of 77 NAC supplements

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from the NIH Office of Dietary Supplements and the National Academies Dietary Reference Intakes (DRI).

This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.

The score analyzes what's on the label: ingredient doses vs. studied ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.

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