BioStacks
Best for
Ingredients (5)
Ester-C
100%Dose
540 mg
Target
250–2000 mg
Form
Budget
Ester-C
24%Dose
60 mg
Target
250–2000 mg
Form
Budget
Rutin
30%Dose
75 mg
Target
250–500 mg
Form
—
Citrus Bioflavonoids
20%Dose
50 mg
Target
250–1000 mg
Form
—
Pycnogenol
6%Dose
3 mg
Target
50–200 mg
Form
—
Other Ingredients (4)
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
Stearic AcidLubricant
Saturated fatty acid used as tablet lubricant
Capsule ShellCapsule
Generic capsule shell where the label does not specify the material. Common materials are hypromellose (HPMC) for vegetarian capsules and gelatin for traditional capsules — both are GRAS-listed and safe. Fish gelatin and pullulan variants also exist.
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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.