At 200 mcg per tablet, you're getting **Selenium** right at the top of the clinically studied range (100–200 mcg/day) used in research on immune function, thyroid support, and antioxidant defense. That's a full effective dose in a single tablet with no need to double up.
The form here is L-selenomethionine, which is the most bioavailable version of supplemental selenium — your body absorbs and retains it more efficiently than alternatives like sodium selenite or selenate.
One thing to keep in mind: 200 mcg is already well above the 55 mcg RDA, and the tolerable upper limit is 400 mcg/day. If you're also getting selenium from a multivitamin or Brazil nuts, you could overshoot that ceiling quickly. Stick to one source at a time.
BioStacks
Other Ingredients (5)
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
Dicalcium PhosphateBinder
Calcium and phosphorus compound used as binder
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
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
Suggested Use: As a dietary supplement for adults, take one (1) tablet daily, preferably with a meal or as directed by a healthcare practitioner.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$10.64
Near the median of 62 selenium supplements
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from the NIH Office of Dietary Supplements and the 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. studied 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.