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.

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BioStacks

Life Extension

N-Acetyl-L-Cysteine 600 mg

Capsule · 60 servings · $0.20/serving

77 / 100Good

Supports

Score Breakdown

Formulation
77
Safety
100
Final score
77/100

Ingredients (1)

N-Acetyl-L-Cysteine600 mg

Within effective range

Label Nutrition Facts

Active Ingredients

From the label · % Daily Value

DV%

N-Acetyl-L-Cysteine600 mg

Other Ingredients

Fillers, coatings, and additives

2Safe

Silicon DioxideAnti-caking

Safe

Microcrystalline CelluloseBinder

Safe

Vegetable Stearate (magnesium stearate)

Unknown

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and 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. clinical 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.