BioStacks
Best for
Ingredients (4)
N-Acetyl L-Cysteine
100%Dose
900 mg
Target
600–1800 mg
Form
—
Selenium
30%Dose
30 mcg
Target
100–200 mcg
Form
Premium
Vitamin C
30%Dose
75 mg
Target
250–2000 mg
Form
Budget
Alpha Lipoic Acid
15%Dose
45 mg
Target
300–600 mg
Form
Budget
Other Ingredients (5)
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
PhospholipidsCarrier
Naturally occurring phospholipids (primarily phosphatidylcholine) used to form liposomal encapsulation for nutrient delivery
PhospholipidsCarrier
Naturally occurring phospholipids (primarily phosphatidylcholine) used to form liposomal encapsulation for nutrient delivery
Sunflower LecithinEmulsifier
Non-GMO, non-allergenic emulsifier derived from sunflower seeds
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 2 capsules daily.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$39.99
Pricier than 91% of 79 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.