BioStacks
Best for
Ingredients (7)
Vitamin E
40%Dose
20 mg
Target
50–268 mg
Form
Premium
Hyaluronic Acid
100%Dose
100 mg
Target
50–200 mg
Form
Standard
Vitamin A
86%Dose
600 mcg RAE
Target
700–1500 mcg
Form
Standard
Vitamin D
40%Dose
400 IU
Target
1000–5000 IU
Form
Budget
L-Proline
20%Dose
100 mg
Target
500–2000 mg
Form
—
Other Ingredients (6)
XylitolSweetener
A FODMAP sugar alcohol that can cause GI distress (bloating, gas, diarrhea) at moderate doses (>10-20g/day), though supplement amounts are typically small. Extremely toxic to dogs — households with pets should store securely.
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.
Potassium SorbatePreservative
Natural preservative derived from sorbic acid
Citric AcidAcidulant
Natural acid derived from citrus fruits
Purified WaterSolvent
Water meeting USP specifications used as solvent/vehicle in gummies and liquids
GlycerinHumectant
Sweet-tasting liquid used in soft capsules and liquids
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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.