BioStacks
Ingredients (5)
Zinc
100%Dose
30 mg
Target
15–30 mg
Form
Premium
Green Tea Leaf Extract
100%Dose
375 mg
Target
200–500 mg
Form
—
N-Acetylcysteine
100%Dose
600 mg
Target
600–1800 mg
Form
—
Vitamin C
100%Dose
200 mg
Target
50–250 mg
Form
Not listed
Quercetin
50%Dose
250 mg
Target
500–1000 mg
Form
—
Other Ingredients (3)
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
Capsule ShellCapsule
Generic capsule shell where the label does not specify the material. Common materials are hypromellose (HPMC) for vegetarian capsules and gelatin for traditional capsules — both are GRAS-listed and safe. Fish gelatin and pullulan variants also exist.
How to Take It
Best taken in the morning
Contains Green Tea Leaf Extract, which is stimulating — keep it to the morning. What's in this absorbs poorly without a fat-containing meal — take it with one.
With a meal containing fat
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.
Keep it away from iron-rich meals
Space it a couple of hours from Iron and Calcium
On the label
Directions: Take two (2) capsules daily or as directed by your healthcare practitioner.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$39.99
Pricier than 80% of 74 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.