BioStacks
Natural Factors

Vitamin D3 125 mcg (5000 IU)

1 Softgel · 120 servings · $0.18/serving

82 / 100Excellent

Score Breakdown

Formulation
97
Safety
85
Final score
82/100

Ingredients (2)

Vitamin D3

100%

Dose

5000 IU

Target

1000–5000 IU

Form

Premium

organic Flaxseed Oil

20%

Dose

200 mg

Target

1000–3000 mg

Form

Budget

Other Ingredients (1)

SoftgelCapsule

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

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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.