BioStacks
Best for
Ingredients (4)
Elderberry Extract 4:1
100%Dose/day
375 mg
Target
300–600 mg
Form
—
Zinc
100%Dose/day
30 mg
Target
15–30 mg
Form
Standard
Vitamin C
30%Dose/day
75 mg
Target
250–2000 mg
Form
Standard
Organic Echinacea Powder
30%Dose/day
90 mg
Target
300–1500 mg
Form
—
Other Ingredients (6)
SucroseSweetener
Added sugars and high glycemic load; dental caries risk
Natural FlavorsFlavor
Broad regulatory category of flavor constituents derived from natural sources. Composition is proprietary and not disclosed — 'Natural Flavors' can include several hundred different compounds depending on the target flavor profile, including hexane-extracted constituents and proprietary carrier solvents. 'Natural' is a regulatory definition (21 CFR §101.22), not a safety guarantee.
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
Citric AcidAcidulant
Natural acid derived from citrus fruits
Monk Fruit ExtractSweetener
Zero-calorie natural sweetener derived from the monk fruit (Siraitia grosvenorii)
Stearic AcidLubricant
Saturated fatty acid used as tablet lubricant
How to Take It
Take it anytime
Take with food — on an empty stomach it commonly causes nausea.
With food
Space it a couple of hours from Iron and Calcium
Split into 3 doses across the day
On the label
Dissolve 1 lozenge in the mouth and swallow 3 times per day or as directed by a health professional. As with any supplement, consult your health professional before use if you are pregnant, breastfeeding, or trying to conceive, or if you are taking medication, have a medical condition, or anticipate a surgery. Keep out of the reach of children.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$11.95
Near the median of 219 zinc 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.