BioStacks
Best for
Ingredients (3)
Selenium
100%Dose
300 mcg
Target
100–200 mcg
Form
Budget
Magnesium
20 mgTrace amount — not scored
Chloride
60 mgTrace amount — not scored
Other Ingredients (3)
Citric AcidAcidulant
Natural acid derived from citrus fruits
PotassiumMineral
Essential mineral naturally present in many plant-based supplement ingredients
Purified WaterSolvent
Water meeting USP specifications used as solvent/vehicle in gummies and liquids
How to Take It
Take it anytime
Take with food. The gap between an effective dose and too much is narrow — don't stack several selenium sources.
With food
On the label
Shake well. Using the metered dropper, take 1.25 mL daily with juice or food to mask the concentrated mineral flavor. Do not refrigerate. Keep out of reach of children.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$15.99
Pricier than 75% of 62 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.