{
  "name": "Vitamin D 2,000 IU Label Census and Cost per Dose",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "attribution": "Verified Supplement Data, https://verifiedsupplementdata.com/vitamin-d/2000-iu/",
  "dateModified": "2026-09-21",
  "methodology": "labels sold as vitamin D (isPrimary) with a vitamin-D row; IU = row quantity, mcg x 40; era = DSLD entry date. Every figure was recomputed in two halves split by label-id parity; figures that did not agree within 8 points (shares) or 25% (medians) are not published.",
  "labelCensus": {
    "source": "NIH Dietary Supplement Label Database",
    "sourceUrl": "https://dsld.od.nih.gov/",
    "retrievedOn": "2026-08-27",
    "labelsRetrieved": 948,
    "labelsSoldAsVitaminD": 583,
    "labelsWithDose": 573,
    "brands": 191,
    "medianIuPerServing": 1000,
    "exactly2000IuPct": 16.4,
    "exactly1000IuPct": 19.7,
    "exactly5000IuPct": 16.6,
    "exactly10000IuPct": 3.5,
    "above4000IuUlPct": 22.9,
    "validation": {
      "method": "split-half by DSLD label-id parity; shares within 8 points, medians within 25%",
      "checked": 21,
      "held": 17,
      "failed": [
        "5,000 IU labels that are softgels",
        "5,000 IU labels that are capsules",
        "5,000 IU labels with an oil carrier",
        "5,000 IU labels directing \"with a meal\""
      ]
    },
    "notPublished": [
      "5,000 IU labels that are softgels",
      "5,000 IU labels that are capsules",
      "5,000 IU labels with an oil carrier",
      "5,000 IU labels directing \"with a meal\""
    ]
  },
  "unitDeclaration": {
    "basis": "Supplement Facts panel declaration unit",
    "source": "NIH Dietary Supplement Label Database",
    "labelsRead": 948,
    "labelsWithDeclaredUnit": 944,
    "declaredInMcgPct": 48.5,
    "splitHalfSpreadPoints": 6.8,
    "held": true,
    "iuPerMcg": 40,
    "note": "2,000 IU = 50 mcg cholecalciferol"
  },
  "physiology": {
    "expectedRise": {
      "slopeNmolPerMcgPerDay": 0.7,
      "mcgPerDay": 50,
      "riseNmolPerL": 35,
      "riseNgPerMl": 14,
      "source": "Heaney 2003, PMID 12499343 (equilibrium 25(OH)D over ~20 weeks)"
    },
    "limits": {
      "rdaAdultIu": 600,
      "rdaOver70Iu": 800,
      "iomUpperLimitIu": 4000,
      "source": "Ross 2011, PMID 21118827"
    }
  },
  "costPerDose": [
    {
      "name": "Kirkland Signature Extra Strength Vitamin D3 2000 IU (600 softgels, 5-pack)",
      "brand": "Kirkland Signature",
      "iuPerServing": 2000,
      "mcgPerServing": 50,
      "servingSize": "1 softgel",
      "servingsPerContainer": 3000,
      "priceUsd": 61.84,
      "priceVerifiedOn": "2026-09-20",
      "costPerDoseUsd": 0.021,
      "format": "softgel",
      "multiBottlePack": true,
      "certification": "USP Verified",
      "nihDsldId": "279473",
      "availability": "ok"
    },
    {
      "name": "Carlyle Vitamin D3 2000 IU (400 softgels)",
      "brand": "Carlyle",
      "iuPerServing": 2000,
      "mcgPerServing": 50,
      "servingSize": "1 softgel",
      "servingsPerContainer": 400,
      "priceUsd": 12.99,
      "priceVerifiedOn": "2026-09-21",
      "costPerDoseUsd": 0.032,
      "format": "softgel",
      "multiBottlePack": false,
      "certification": "None stated (laboratory tested claim)",
      "nihDsldId": null,
      "availability": "ok"
    },
    {
      "name": "NatureWise Vitamin D3 2000 IU in Olive Oil (360 mini softgels)",
      "brand": "NatureWise",
      "iuPerServing": 2000,
      "mcgPerServing": 50,
      "servingSize": "1 mini softgel",
      "servingsPerContainer": 360,
      "priceUsd": 12.32,
      "priceVerifiedOn": "2026-09-21",
      "costPerDoseUsd": 0.034,
      "format": "softgel",
      "multiBottlePack": false,
      "certification": "NSF Contents Certified",
      "nihDsldId": null,
      "availability": "ok"
    },
    {
      "name": "NOW Vitamin D-3 2,000 IU (240 softgels)",
      "brand": "NOW Foods",
      "iuPerServing": 2000,
      "mcgPerServing": 50,
      "servingSize": "1 softgel",
      "servingsPerContainer": 240,
      "priceUsd": 8.83,
      "priceVerifiedOn": "2026-09-21",
      "costPerDoseUsd": 0.037,
      "format": "softgel",
      "multiBottlePack": false,
      "certification": "NPA GMP Certified",
      "nihDsldId": null,
      "availability": "ok"
    },
    {
      "name": "Nature's Bounty Vitamin D3 2000 IU (350 softgels)",
      "brand": "Nature's Bounty",
      "iuPerServing": 2000,
      "mcgPerServing": 50,
      "servingSize": "1 softgel",
      "servingsPerContainer": 350,
      "priceUsd": 13.76,
      "priceVerifiedOn": "2026-09-21",
      "costPerDoseUsd": 0.039,
      "format": "softgel",
      "multiBottlePack": false,
      "certification": "None",
      "nihDsldId": null,
      "availability": "ok"
    },
    {
      "name": "Nature Made Vitamin D3 2000 IU Tablets (220 tablets)",
      "brand": "Nature Made",
      "iuPerServing": 2000,
      "mcgPerServing": 50,
      "servingSize": "1 tablet",
      "servingsPerContainer": 220,
      "priceUsd": 9.99,
      "priceVerifiedOn": "2026-09-21",
      "costPerDoseUsd": 0.045,
      "format": "tablet",
      "multiBottlePack": false,
      "certification": "USP Verified",
      "nihDsldId": null,
      "availability": "ok"
    },
    {
      "name": "Nature Made Vitamin D3 2000 IU",
      "brand": "Nature Made",
      "iuPerServing": 2000,
      "mcgPerServing": 50,
      "servingSize": "1 softgel",
      "servingsPerContainer": 250,
      "priceUsd": 15.99,
      "priceVerifiedOn": "2026-09-20",
      "costPerDoseUsd": 0.064,
      "format": "softgel",
      "multiBottlePack": false,
      "certification": "USP Verified",
      "nihDsldId": null,
      "availability": "ok"
    }
  ]
}