{
  "name": "Liquid Collagen Label Census and Cost per Gram",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "attribution": "Verified Supplement Data, https://verifiedsupplementdata.com/collagen/liquid-vs-powder/",
  "dateModified": "2026-09-15",
  "methodology": "Labels were enumerated from the NIH Dietary Supplement Label Database by paging its ranked search for liquid-collagen terms and keeping only labels whose filed physical state is Liquid and whose Supplement Facts carry collagen; labels sold as collagen (collagen in the product name) were analysed. Collagen per serving = the collagen row for the Supplement Facts serving. Figures are reported per label and per brand line (same brand, same dose, same serving unit counted once). 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. Cost per gram = Amazon price / (grams per serving x servings per container).",
  "labelCensus": {
    "source": "NIH Dietary Supplement Label Database",
    "sourceUrl": "https://dsld.od.nih.gov/",
    "retrievedOn": "2026-09-15",
    "onMarketCollagenLabelsAnyForm": 46040,
    "labelsRetrieved": 84,
    "labelsSoldAsCollagen": 64,
    "excludedNotSoldAsCollagen": 20,
    "labelsWithServingDose": 58,
    "brands": 26,
    "brandLines": 40,
    "topBrand": "Health Direct",
    "topBrandLabels": 28,
    "perLabel": {
      "medianCollagenMgPerServing": 10000,
      "under2500MgPerServingPct": 17.2,
      "atLeast10000MgPerServingPct": 55.2,
      "under2500MgPerDayPct": 18.9,
      "atLeast10000MgPerDayPct": 50.9,
      "sugarsRowDeclaredPct": 59.4,
      "sugarFreePct": 53.1,
      "medianSugarsGramsPerDay": 0
    },
    "perBrandLine": {
      "medianCollagenMgPerServing": 5000,
      "p75MgPerServing": 10000,
      "p75DailyMg": 10000,
      "atLeast10000MgPerServingPct": 38.9,
      "under2500MgPerDayPct": 24.2,
      "hydrolyzedOrPeptidesStatedPct": 80,
      "singleServePct": 35,
      "sugarsRowDeclaredPct": 47.5
    },
    "validation": {
      "method": "split-half by DSLD label-id parity (the harvest pooled two populations - an earlier shelf read and a format search - so read order is not a random split)",
      "perLabel": {
        "checked": 16,
        "held": 9,
        "failed": [
          "median daily collagen mg",
          "p75 daily collagen mg",
          "p75 per-serving mg",
          "share at least 5 g/day",
          "vitamin C co-formulated share",
          "hydrolyzed/peptides stated share",
          "single-serve share"
        ]
      },
      "perBrandLine": {
        "checked": 16,
        "held": 10,
        "failed": [
          "share below 2.5 g per serving",
          "share at least 5 g/day",
          "share at least 10 g/day",
          "vitamin C co-formulated share",
          "median sugars g/day (declaring)",
          "sugar-free share"
        ]
      }
    },
    "notPublished": {
      "perLabel": [
        "median daily collagen mg",
        "p75 daily collagen mg",
        "p75 per-serving mg",
        "share at least 5 g/day",
        "vitamin C co-formulated share",
        "hydrolyzed/peptides stated share",
        "single-serve share"
      ],
      "perBrandLine": [
        "share below 2.5 g per serving",
        "share at least 5 g/day",
        "share at least 10 g/day",
        "vitamin C co-formulated share",
        "median sugars g/day (declaring)",
        "sugar-free share"
      ]
    }
  },
  "costPerGram": [
    {
      "name": "Sports Research Collagen Peptides (Unflavored)",
      "brand": "Sports Research",
      "form": "powder",
      "collagenGramsPerServing": 11,
      "servingSize": "1 scoop (11g)",
      "servingsPerContainer": 41,
      "priceUsd": 32.95,
      "priceVerifiedOn": "2026-09-08",
      "costPerGramUsd": 0.073,
      "nihDsldId": null,
      "availability": "ok"
    },
    {
      "name": "Youtheory Collagen Liquid 5,000 mg (12 x 1 fl oz packets)",
      "brand": "Youtheory",
      "form": "liquid",
      "collagenGramsPerServing": 5,
      "servingSize": "1 packet (30 mL)",
      "servingsPerContainer": 12,
      "priceUsd": 16.79,
      "priceVerifiedOn": "2026-09-15",
      "costPerGramUsd": 0.28,
      "nihDsldId": "272116",
      "availability": "ok"
    },
    {
      "name": "Applied Nutrition Liquid Collagen (20 x 10 mL tubes)",
      "brand": "Applied Nutrition",
      "form": "liquid",
      "collagenGramsPerServing": 4,
      "servingSize": "1 tube (10 mL)",
      "servingsPerContainer": 20,
      "priceUsd": 25.98,
      "priceVerifiedOn": "2026-09-15",
      "costPerGramUsd": 0.325,
      "nihDsldId": "67229",
      "availability": "ok"
    },
    {
      "name": "Nature's Truth Liquid Collagen (16 fl oz)",
      "brand": "Nature's Truth",
      "form": "liquid",
      "collagenGramsPerServing": 1,
      "servingSize": "1 tablespoon (15 mL)",
      "servingsPerContainer": 31,
      "priceUsd": 17.29,
      "priceVerifiedOn": "2026-09-15",
      "costPerGramUsd": 0.558,
      "nihDsldId": "306740",
      "availability": "ok"
    },
    {
      "name": "RejuviCare Liquid Collagen Complex (16 fl oz)",
      "brand": "RejuviCare",
      "form": "liquid",
      "collagenGramsPerServing": 0.5,
      "servingSize": "1 tablespoon (15 mL)",
      "servingsPerContainer": 32,
      "priceUsd": 9.44,
      "priceVerifiedOn": "2026-09-15",
      "costPerGramUsd": 0.59,
      "nihDsldId": "71191",
      "availability": "ok"
    }
  ]
}