This is a once-weekly **Vitamin D3** softgel delivering 50,000 IU in a single dose — a protocol typically used to correct deficiency under clinical supervision. Spread over seven days, that averages roughly 7,100 IU/day, which lands above the standard 1,000–5,000 IU/day range studied for maintenance but is consistent with the loading doses used in deficiency-correction trials. The form is cholecalciferol (D3), which raises and maintains your blood levels far more effectively than D2.

The softgel is packed in olive oil, giving you a built-in fat source that supports absorption since D3 is fat-soluble. Adequate vitamin D underpins bone density, immune function, mood regulation, and muscle health — all areas where deficiency has measurable consequences, especially if you get limited sun or live in a higher latitude.

This is not a daily maintenance product. At 50,000 IU per dose, you're well above the 4,000 IU/day tolerable upper limit, and the label explicitly warns against combining it with other high-dose vitamin D supplements. You should have your blood levels monitored while using it, and it's best treated as a short-term correction tool rather than a long-term daily habit.

BioStacks
California Gold Nutrition

Simply One, Vitamin D3 1,250 mcg (50,000 IU) High Potency

Capsule · 1 Softgel · 50 servings · $0.11/serving

iHerbAmazon
70 / 100Good

Best for

ImmuneDentalBone & Joint

Score Breakdown

Formulation
100
Safety
70
Final score
70/100

Ingredients (1)

Vitamin D

100%

Dose

50000 IU

Target

1000–5000 IU

Form

Premium

Other Ingredients (5)

GelatinCapsule

Protein derived from collagen, used in traditional capsule shells

GlycerinHumectant

Sweet-tasting liquid used in soft capsules and liquids

Extra Virgin Olive OilCarrier

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

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

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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.

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