BioStacks
Ingredients (10)
Vitamin D3
100%Dose
3000 IU
Target
1000–5000 IU
Form
Premium
Zinc
100%Dose
15 mg
Target
15–30 mg
Form
Premium
Elderberry Fruit Extract
100%Dose
300 mg
Target
300–600 mg
Form
—
Selenium
100%Dose
150 mcg
Target
100–200 mcg
Form
Standard
Vitamin A
100%Dose
750 mcg RAE
Target
700–1500 mcg
Form
Standard
Other Ingredients (7)
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
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
Citric AcidAcidulant
Natural acid derived from citrus fruits
Croscarmellose SodiumDisintegrant
Cross-linked cellulose derivative used as a superdisintegrant
EthylcelluloseCoating
A cellulose-derived polymer used for film coating and binding.
Stearic AcidLubricant
Saturated fatty acid used as tablet lubricant
How to Take It
Take it anytime
Fat-soluble — take with your largest fat-containing meal. Time of day doesn't matter.
With a meal containing fat
Space it a couple of hours from Iron and Calcium
On the label
1 tablet daily.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$52.95
Pricier than 93% of 544 vitamin C 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.