BioStacks
Best for
Ingredients (4)
Vitamin D
100%Dose
1000 IU
Target
1000–5000 IU
Form
Premium
Zinc
67%Dose
10 mg
Target
15–30 mg
Form
Premium
Selenium
50%Dose
50 mcg
Target
100–200 mcg
Form
Premium
Vitamin C
100%Dose
500 mg
Target
250–2000 mg
Form
Budget
Other Ingredients (4)
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
HypromelloseCapsule
Plant-derived capsule material from cellulose
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
How to Take It
Take it anytime
Fat-soluble — take with your largest fat-containing meal. Time of day doesn't matter.
With a meal containing fat
Space it a couple of hours from Iron and Calcium
On the label
Take 1 capsule daily, with food. Best when taken as directed by a qualified healthcare professional.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$13.89
Cheaper than 86% of 292 immune 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.