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Nature Made Vitamin D3 1000 IU 100 Tablets 25 Mcg

Nature Made Vitamin D3 1000 IU 100 Tablets 25 Mcg

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Brand ownership disclosure
Otsuka Pharmaceutical (via Pharmavite)
Otsuka Holdings (TSE: 4578, Japan)
Pharmavite has been Otsuka-owned since 1989. Same parent as Abilify + Pocari Sweat.
$6.09 USD
$6.09 USD
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The full picture

Score, six-dimension breakdown, evidence, and FAQ. Every vendor is scored on the same published rubric — no brand can pay for placement. Read the rubric →

76/100
verified

Six-dimension breakdown

Evidence
78
Formulation
72
Manufacturing
85
Safety
85
Transparency
82
Sustainability
60
Last scored: Full rubric →

Evidence & sources

The Vyvata score's Evidence dimension measures the quality of published RCT support for a product's active ingredients at the label dose. Our source hierarchy: double-blind RCTs in MEDLINE-indexed journals > single-blind RCTs > open-label trials > observational studies > mechanism papers > N=1 case studies (anecdotes). Predatory journals and manufacturer-authored studies without independent replication are weighted down.

Product-specific evidence citations for this item are in How we scored this, above. For the full framework and evidence hierarchy, see the methodology page.

How to read the Evidence dimension

  • 80–100: Multiple double-blind RCTs in indexed journals directly testing this product OR the exact ingredients at the exact dose.
  • 60–79: Single double-blind RCT + supporting ingredient literature at the studied dose.
  • 40–59: Open-label trials + ingredient literature; no product-specific double-blind evidence.
  • 20–39: Ingredient literature only; no product-specific trials or trials in predatory venues.
  • 0–19: No credible evidence base or unverifiable claims.

FAQ data has not been generated for this product yet. See the site FAQ for general questions.

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