BioStacks
Best for
Ingredients (7)
Vitamin D
100%Dose
1000 IU
Target
1000–5000 IU
Form
Premium
Vitamin B6
10%Dose
2.5 mg
Target
25–100 mg
Form
Premium
Vitamin A
100%Dose
750 mcg RAE
Target
700–1500 mcg
Form
Standard
Zinc
67%Dose
10 mg
Target
15–30 mg
Form
Premium
Selenium
50%Dose
50 mcg
Target
100–200 mcg
Form
Premium
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
Best taken in the morning
The Vitamin B6 in it is what pulls this toward the morning. Take it with a meal containing fat — the vitamins A and D in it absorb poorly without one.
With a meal containing fat
Space it a couple of hours from Iron and Calcium
On the label
Take 1 capsule daily, with or without 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
$21.56
Near the median 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.