BioStacks
Ingredients (5)
Zinc
100%Dose
30 mg
Target
15–30 mg
Form
Premium
Lutein from Marigold Flower Extract (FloraGLO)
100%Dose
10 mg
Target
10–20 mg
Form
Premium
Vitamin A
100%Dose
1500 mcg RAE
Target
700–1500 mcg
Form
Standard
French Grape Seed Extract (VX1)
67%Dose
100 mg
Target
150–600 mg
Form
—
Zeaxanthin from Marigold Flower Extract (OPTISHARP Natural and FloraGLO)
5%Dose
0.5 mg
Target
10–20 mg
Form
Premium
Other Ingredients (10)
Glucose SyrupSweetener
High glycemic load; source typically corn (generally gluten-free)
MaltodextrinBinder
Spikes blood sugar faster than table sugar (glycemic index 85–105). Research links it to gut bacteria changes that may promote intestinal inflammation (Nickerson et al. 2015). Used as a cheap filler — adds nothing beneficial.
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
Citric AcidAcidulant
Natural acid derived from citrus fruits
HypromelloseCapsule
Plant-derived capsule material from cellulose
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
Ascorbic AcidAntioxidant
Vitamin C used as an antioxidant preservative in supplements to prevent oxidation
How to Take It
Take it anytime
Take it with a meal containing fat — the vitamin A in it absorbs poorly without one.
With a meal containing fat
Space it a couple of hours from Iron and Calcium
On the label
Take 1 capsule daily, or as directed by your healthcare practitioner.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$44.76
Pricier than 95% of 210 zinc 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.