Each softgel packs 10,000 IU of **Vitamin D3** — double the top of the studied maintenance range (1,000–5,000 IU/day). But the label tells you to take one every three days, which works out to roughly 3,333 IU daily. That lands right in the clinical sweet spot for supporting bone density, immune function, and mood. The D3 form (cholecalciferol) is the same type your body makes from sunlight, and the olive oil in the softgel helps absorption since vitamin D is fat-soluble.

This is built for people correcting a deficiency or maintaining levels in low-sun environments — your doctor can confirm with a simple blood test. The health dimension coverage is broad: bone, immune, mood, muscle, hormones, and metabolism all benefit from adequate vitamin D status.

The critical detail: do not take this daily. At 10,000 IU per day you'd be at 2.5x the tolerable upper limit (4,000 IU), which can cause calcium buildup over time. Follow the every-three-days schedule unless your practitioner says otherwise based on your bloodwork.

BioStacks
NOW

High Potency Vitamin D-3 10,000 IU

Capsule · 1 Softgel · 120 servings

iHerbAmazon
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What it does

Vitamin D

vitamin d3Premium

Cholecalciferol (vitamin d3): Supports normal bones; D3 generally raises vitamin D blood levels more than comparable D2 doses.

ImmuneDentalBone & Joint
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Ingredients (1)

Other ingredients

GelatinCapsule

Protein derived from collagen, used in traditional capsule shells

Extra Virgin Olive OilCarrier

Cold-pressed olive oil used as a carrier and filler in softgel capsules for fat-soluble nutrients

GlycerinHumectant

Sweet-tasting liquid used in soft capsules and liquids

Safflower Seed OilCarrier

Light, neutral oil from safflower seeds used as a carrier in softgels for fat-soluble nutrients

Purified WaterSolvent

Water meeting USP specifications used as solvent/vehicle in gummies and liquids

Lab testing

How to take it

With a meal containing fat

On the label

Suggested Usage: Take 1 softgel every 3 days with a fat-containing meal, or as directed by your healthcare practitioner.

Price check

$8.91

$10$20

Cheaper than 86% of 552 vitamin D supplements

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from the NIH Office of Dietary Supplements and the 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. studied 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.

Not medical advice. Consult your healthcare professional.

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