BioStacks
Best for
Ingredients (5)
Vitamin C
100%Dose
1000 mg
Target
250–2000 mg
Form
Not listed
Blackcurrant extract
63%Dose
50 mg
Target
80–500 mg
Form
—
Zinc
33%Dose
5 mg
Target
15–30 mg
Form
Not listed
Black Elderberry extract
27%Dose
80 mg
Target
300–600 mg
Form
—
Bilberry extract
3%Dose
2 mg
Target
80–500 mg
Form
—
Other Ingredients (10)
Fruit Juice (unspecified)Colorant
Juice or juice concentrate used primarily for natural color and flavor in gummies
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
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
Lithothamnion CalcareaFiller
Calcified red seaweed used as a whole-food tablet base and natural calcium/magnesium source (common in food-based multivitamin lines)
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
Ascorbic AcidAntioxidant
Vitamin C used as an antioxidant preservative in supplements to prevent oxidation
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
Bilberry (Vaccinium ulginosum) extract
Not reviewed yet
How to Take It
Take it anytime
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
Adults take 2 tablets 1-3 times a day (children 8 and over 1-2 tablets a day) with meals. Do not exceed recommended daily intake. Food supplements should not be used as a substitute for a varied and balanced diet and healthy lifestyle.
General guidance based on the ingredients, not a substitute for the label or your doctor.
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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.