**Vitamin D3** at 5,000 IU per softgel puts you at the top of the clinically studied range (1,000–5,000 IU/day) for supporting bone health, immune function, and mood. The form is cholecalciferol — the D3 form your body produces from sunlight and absorbs far more efficiently than D2. With extra virgin olive oil as the carrier, you're getting a built-in fat source that helps your body absorb this fat-soluble vitamin without needing to time it with a meal.

At this dose, you're well-covered across vitamin D's broad range of roles — from calcium absorption and bone density to immune regulation and muscle function. Deficiency is extremely common, especially if you have limited sun exposure, darker skin, or live at higher latitudes, and 5,000 IU is the dose many practitioners recommend for people with low baseline levels.

This dose sits above the 4,000 IU tolerable upper limit set by health authorities, so it's worth checking your blood levels periodically to confirm you're in the optimal range and not overshooting. A 180-softgel bottle gives you a six-month supply at one per day.

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BioStacks

Doctor's Best

Vitamin D3 5000 IU

Capsule · 180 servings · $0.06/serving

85 / 100Excellent

Score Breakdown

Formulation
100
Safety
85
Final score
85/100

Ingredients (1)

Vitamin D35000 IU

Exceeds UL · Premium form

Label Nutrition Facts

Active Ingredients

From the label · % Daily Value

DV%

Vitamin D3125 mcg

833%

Other Ingredients

Fillers, coatings, and additives

1Safe

Extra Virgin Olive OilCarrier

Safe

Softgel capsule (capsule)

Unknown

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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.