BioStacks
Ingredients (5)
Selenium
100%Dose/day
201 mcg
Target
100–200 mcg
Form
Premium
N-Acetyl-L-Cysteine
100%Dose/day
600 mg
Target
600–1800 mg
Form
—
Alpha-Lipoic Acid
100%Dose/day
600 mg
Target
300–600 mg
Form
Budget
Milk Thistle Extract
100%Dose/day
600 mg
Target
150–600 mg
Form
Budget
80% Silymarin
Amount not found
Other Ingredients (4)
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
Ascorbyl PalmitateAntioxidant
Fat-soluble form of vitamin C used as preservative
HypromelloseCapsule
Plant-derived capsule material from cellulose
Purified WaterSolvent
Water meeting USP specifications used as solvent/vehicle in gummies and liquids
How to Take It
Take it anytime
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.
Split into 3 doses across the day
On the label
Adults: 1 capsule, 3 times daily with food or as directed by a healthcare professional. Children 4 to 14 years: 1 capsule daily or as directed by a healthcare professional. Children less than 4 years of age: As directed by a healthcare professional.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$49.99
Pricier than 95% of 80 selenium 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.