BioStacks
Best for
Ingredients (11)
Grapefruit Seed Extract
100%Dose
250 mg
Target
100–500 mg
Form
—
Vitamin C
50%Dose
125 mg
Target
250–2000 mg
Form
Not listed
Zinc
33%Dose
5 mg
Target
15–30 mg
Form
Standard
Astragalus
50%Dose
100 mg
Target
200–500 mg
Form
—
Yarrow extract
50%Dose
50 mg
Target
100–1000 mg
Form
—
Other Ingredients (7)
Coating (unspecified)Coating
Generic tablet coating declaration where the label does not itemize the coating's components; modern aqueous film coatings are typically cellulose-based (HPMC) with a plasticizer
DextroseSweetener
A simple glucose sugar used as a bulking agent, sweetener, and tablet diluent
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
Dicalcium PhosphateBinder
Calcium and phosphorus compound used as binder
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
Stearic AcidLubricant
Saturated fatty acid used as tablet lubricant
How to Take It
Take it anytime
No evidence a formula this broad works better at any particular hour. Take it with food — the zinc in it is what makes this kind of product feel nauseating on an empty stomach.
With food
Space it a couple of hours from Iron and Calcium
On the label
At first signs of imbalance or depressed resistance, take one tablet daily with or without meals for two weeks.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$22.49
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. 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.