{
  "dataset": "colostrum-igg-by-brand",
  "title": "Bovine Colostrum Compared — disclosed IgG %, colostrum per serving, cost per gram of IgG",
  "sourcePage": "https://verifiedsupplementdata.com/colostrum/best-overall/",
  "license": "CC BY 4.0",
  "licenseUrl": "https://creativecommons.org/licenses/by/4.0/",
  "attribution": "Verified Supplement Data (2026), Colostrum IgG Disclosure Comparison",
  "dateModified": "2026-07-14",
  "methodology": "IgG % is each brand's own disclosed minimum from its label/product page, or null when the brand does not disclose it (the key finding — most, including ARMRA, do not). Colostrum mg per serving is the labeled dose. Cost per serving = live Amazon price divided by pack serving count. Cost per gram of IgG = cost per serving divided by grams of IgG per serving (colostrum g x disclosed IgG %); it is null and INCOMPUTABLE for any brand that does not disclose IgG.",
  "headline": {
    "brandsCompared": 7,
    "disclosingIgG": 4,
    "notDisclosingIgG": 3
  },
  "columns": [
    "brand",
    "product",
    "form",
    "colostrumMg",
    "iggDisclosed",
    "iggPercent",
    "iggGramsPerServing",
    "costPerServing",
    "costPerGramIgG",
    "buyable"
  ],
  "units": {
    "colostrumMg": "mg",
    "iggPercent": "%",
    "iggGramsPerServing": "g",
    "costPerServing": "USD",
    "costPerGramIgG": "USD/g IgG"
  },
  "brands": [
    {
      "brand": "Vitamatic",
      "product": "Bovine Colostrum Powder",
      "slug": "vitamatic-colostrum",
      "buyable": true,
      "form": "Powder",
      "colostrumMg": 2000,
      "iggDisclosed": true,
      "iggPercent": 50,
      "costPerServing": 0.67,
      "processing": "Powder, not detailed",
      "notes": "Highest disclosed IgG here (min 50%); nearly the cheapest per gram of IgG because of that concentration. Third-party testing claimed but no lab named.",
      "iggGramsPerServing": 1,
      "costPerGramIgG": 0.67
    },
    {
      "brand": "Vital Proteins",
      "product": "Bovine Colostrum (40% IgG)",
      "slug": "vital-proteins-colostrum",
      "buyable": true,
      "form": "Capsule",
      "colostrumMg": 1350,
      "iggDisclosed": true,
      "iggPercent": 40,
      "costPerServing": 1.25,
      "processing": "Capsule, not detailed",
      "notes": "A mainstream, recognizable brand that discloses potency (40% IgG). Costs the most per gram of IgG of the disclosers — you pay for the name.",
      "iggGramsPerServing": 0.54,
      "costPerGramIgG": 2.31
    },
    {
      "brand": "Nutricost",
      "product": "Colostrum Powder (30% IgG)",
      "slug": "nutricost-colostrum-powder",
      "buyable": true,
      "form": "Powder",
      "colostrumMg": 3000,
      "iggDisclosed": true,
      "iggPercent": 30,
      "costPerServing": 0.53,
      "processing": "Powder, ISO batch-tested",
      "notes": "Guaranteed minimum 30% IgG plus per-batch ISO-accredited lab testing = the cheapest per gram of verified IgG in the set.",
      "iggGramsPerServing": 0.9,
      "costPerGramIgG": 0.59
    },
    {
      "brand": "Nutricost",
      "product": "Colostrum 1000 mg Capsules (15% IgG)",
      "slug": "nutricost-colostrum-caps",
      "buyable": true,
      "form": "Capsule",
      "colostrumMg": 1000,
      "iggDisclosed": true,
      "iggPercent": 15,
      "costPerServing": 0.27,
      "processing": "Capsule, ISO batch-tested",
      "notes": "The convenient capsule that still discloses IgG (min 15%) and is batch-tested. Lower concentration, honestly labeled.",
      "iggGramsPerServing": 0.15,
      "costPerGramIgG": 1.8
    },
    {
      "brand": "Cowboy",
      "product": "Colostrum (1st Milking, Vanilla)",
      "slug": "cowboy-colostrum",
      "buyable": true,
      "form": "Powder",
      "colostrumMg": 3000,
      "iggDisclosed": false,
      "iggPercent": null,
      "costPerServing": 1.73,
      "processing": "Spray-dried, 161°F/15s",
      "notes": "First-milking, full-fat, grass-fed — a strong sourcing story, but discloses no IgG %, so potency is unverifiable. Priciest per serving here.",
      "iggGramsPerServing": null,
      "costPerGramIgG": null
    },
    {
      "brand": "ARMRA",
      "product": "Colostrum (Unflavored)",
      "slug": "armra-colostrum",
      "buyable": true,
      "form": "Powder",
      "colostrumMg": 1000,
      "iggDisclosed": false,
      "iggPercent": null,
      "costPerServing": 1.33,
      "processing": "Proprietary \"cold-chain,\" temp not disclosed",
      "notes": "The TikTok-viral leader. Contaminant-tested, but discloses no IgG figure anywhere — so cost per gram of IgG cannot be calculated at all.",
      "iggGramsPerServing": null,
      "costPerGramIgG": null
    },
    {
      "brand": "NOW Foods",
      "product": "Colostrum 500 mg Capsules",
      "slug": "now-colostrum",
      "buyable": true,
      "form": "Capsule",
      "colostrumMg": 500,
      "iggDisclosed": false,
      "iggPercent": null,
      "costPerServing": 0.25,
      "processing": "Capsule, not detailed",
      "notes": "Cheapest sticker price and a long Amazon track record — but no disclosed IgG, so the low price buys unknown potency.",
      "iggGramsPerServing": null,
      "costPerGramIgG": null
    }
  ]
}