BioStacks
Best for
Ingredients (3)
Molybdenum
100%Dose
50 mcg
Target
45–75 mcg
Form
Premium
N-Acetylcysteine
100%Dose
600 mg
Target
600–1800 mg
Form
—
Selenium
50%Dose
50 mcg
Target
100–200 mcg
Form
Premium
Other Ingredients (3)
Natural FlavorsFlavor
Broad regulatory category of flavor constituents derived from natural sources. Composition is proprietary and not disclosed — 'Natural Flavors' can include several hundred different compounds depending on the target flavor profile, including hexane-extracted constituents and proprietary carrier solvents. 'Natural' is a regulatory definition (21 CFR §101.22), not a safety guarantee.
Citric AcidAcidulant
Natural acid derived from citrus fruits
HypromelloseCapsule
Plant-derived capsule material from cellulose
How to Take It
Take it anytime
Selenium is easier on the stomach taken with food.
With food
NAC does better on an empty stomach, but something else in this bottle needs food. Taking the whole product with a meal is the better trade — an upset stomach is why most people stop.
On the label
Take 1 capsule daily, preferably with a meal. For additional detoxification support take up to 4 capsules daily, or as recommended by a nutritionally-informed physician. Store in a cool dry place.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$5.14
Cheaper than 99% of 77 NAC supplements
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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.