You're getting 1,000 IU of **Vitamin D3** as cholecalciferol — the form your body produces from sunlight and the most effective at raising blood levels. At 1,000 IU, you're right at the floor of the clinical range (1,000–5,000 IU/day), which is enough to maintain adequate levels if you're not deficient. The softgel uses olive oil as a carrier, which helps since D3 is fat-soluble and absorbs better with dietary fat.

This dose supports bone density, immune function, and mood regulation — the areas where vitamin D has the strongest clinical backing. If you're already getting some sun exposure and eating vitamin D-rich foods, 1,000 IU may be a reasonable maintenance dose.

If you're correcting a deficiency, live in a northern climate, or have darker skin, 1,000 IU is likely too low. Many practitioners recommend 2,000–5,000 IU daily in those situations, so you'd need to double or triple your intake to reach the upper clinical range.

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Doctor's Best

Vitamin D3 1000 IU

Capsule · 1 Softgel · 180 servings

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What it does

Vitamin D

Mixed formsGrade —

Supports calcium absorption and the maintenance of normal bones.

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Ingredients (1)

Other ingredients

Extra Virgin Olive OilCarrier

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

SoftgelCapsule

One-piece gelatin capsule shell with a plasticizer (typically glycerin), used to encapsulate liquid or oil-based supplements

Lab testing

How to take it

With a meal containing fat

On the label

Suggested Adult Use: Take 1 softgel daily with food, or as recommended by a nutritionally informed physician.

Price check

$8.99

$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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