This **Vitamin D3** delivers 4,000 IU per soft gel — a correction-level dose aimed at raising low blood levels, not everyday maintenance. That puts it right at the 4,000 IU safe upper limit, so it's well-suited if you're deficient or get little sun, but more than most people need for routine upkeep, where 1,000–2,000 IU is plenty.
It's the cholecalciferol (D3) form, which raises and holds blood levels better than D2, and since vitamin D is fat-soluble, taking it with a meal — as the label directs — helps absorption. D3 supports bone strength, immune function, and dental health. At 4,000 IU, it's worth getting your blood levels checked periodically rather than dosing high indefinitely.
BioStacks
Other Ingredients (2)
SoftgelCapsule
One-piece gelatin capsule shell with a plasticizer (typically glycerin), used to encapsulate liquid or oil-based supplements
Sunflower Seed OilCarrier
Common vegetable oil from sunflower seeds used as a carrier in softgels for fat-soluble nutrients
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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.