BioStacks
Best for
Ingredients (5)
Zinc
100%Dose
15 mg
Target
15–30 mg
Form
Premium
Vitamin D3
100%Dose
1000 IU
Target
1000–5000 IU
Form
Premium
Black Elderberry Fruit Extract
100%Dose
429 mg
Target
300–600 mg
Form
—
Vitamin C
100%Dose
1000 mg
Target
250–2000 mg
Form
Budget
Anthocyanins
38%Dose
30 mg
Target
80–500 mg
Form
—
Other Ingredients
No other ingredients listed
How to Take It
Take it anytime
Take it with a meal containing fat — the vitamin D in it absorbs poorly without one.
With a meal containing fat
Space it a couple of hours from Iron and Calcium
On the label
Three soft gels daily, with food, or as directed by your healthcare professional or pharmacist.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$34.95
Near the median of 292 immune 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.