{
  "dataset": "rhodiola-cost-by-brand",
  "title": "Rhodiola rosea Supplements Compared — cost per day, rosavin standardization, and species-authenticity verdict",
  "sourcePage": "https://verifiedsupplementdata.com/rhodiola/is-it-real/",
  "license": "CC-BY-4.0",
  "licenseUrl": "https://creativecommons.org/licenses/by/4.0/",
  "attribution": "Verified Supplement Data (2026), Rhodiola Cost & Standardization Comparison",
  "dateModified": "2026-07-15",
  "methodology": "Rosavins are the Rhodiola rosea species fingerprint (nearly unique to it); salidroside is not species-specific and also occurs in the cheaper adulterant R. crenulata, so a salidroside spec alone does not prove the right species. The genuine authenticity profile is ~3% rosavins AND ~1% salidroside (≈3:1); a rosavin-absent or salidroside-forward label is a red flag. \"verdict\" classifies each label: rosavin-standard (discloses ~3% rosavins + ~1% salidroside), rosavin-forward-mg (rosavins in mg only, no %), salidroside-forward (salidroside disclosed, no rosavin — the R. crenulata substitution signature), ratio-only (e.g. \"10:1\", no % at all), sub-potency (rosavin disclosed but well below ~3%), and contradictory (label contradicts itself). costPerDay = live Amazon price / servings (1 serving = 1 day at the labeled dose). costPerMgRosavin = costPerDay / disclosed mg of rosavins; it is null where rosavins are not disclosed, because that product cannot be verified against any studied extract. A published certificate of analysis (COA) does NOT by itself equal honest standardization: two flagged products publish a COA while several clean rosavin-standard disclosers make no third-party claim.",
  "headline": {
    "productsCompared": 11,
    "rosavinStandardDisclosers": 6,
    "flagged": 4,
    "cheapestPerMgRosavin": 0.028,
    "cheapestPerMgRosavinBrand": "NOW Foods",
    "note": "Independent surveys have found 20-40% of R. rosea products mislabeled or the wrong species (Booker 2016, PMID 26626192; Xin 2015, PMID 25661009). Disclosed rosavin content — not lowest price — is the real buying signal."
  },
  "columns": [
    "brand",
    "product",
    "slug",
    "extractMg",
    "servings",
    "price",
    "costPerDay",
    "standardization",
    "verdict",
    "rosavinDisclosed",
    "rosavinMgPerServing",
    "costPerMgRosavin",
    "thirdParty"
  ],
  "units": {
    "extractMg": "mg rhodiola extract",
    "price": "USD",
    "costPerDay": "USD/day",
    "rosavinMgPerServing": "mg rosavins",
    "costPerMgRosavin": "USD per mg rosavins"
  },
  "citations": [
    {
      "claim": "~20% of R. rosea products had no rosavin, and most of the remainder were lower in rosavin or adulterated with other Rhodiola species.",
      "source": "Booker A, et al. 2016",
      "pmid": "26626192"
    },
    {
      "claim": "DNA-barcoded ~100 R. crenulata products; roughly 60% were the wrong species.",
      "source": "Xin T, et al. 2015",
      "pmid": "25661009"
    },
    {
      "claim": "Independent lab testing found one product with ~1/10 the expected rosavins and another with ~1/2.",
      "source": "ConsumerLab.com (independent HPLC testing; not peer-reviewed)"
    }
  ],
  "products": [
    {
      "brand": "Double Wood",
      "product": "Rhodiola Rosea 500 mg",
      "slug": "double-wood-rhodiola-500",
      "extractMg": 500,
      "servings": 120,
      "price": 17.95,
      "costPerDay": 0.15,
      "standardization": "Self-contradictory label: listing says 3% salidroside / 1% rosavins; the COA implies 3% rosavins / 1% salidroside",
      "verdict": "contradictory",
      "rosavinDisclosed": false,
      "rosavinMgPerServing": null,
      "costPerMgRosavin": null,
      "thirdParty": true
    },
    {
      "brand": "Bronson",
      "product": "Rhodiola Rosea 1000 mg",
      "slug": "bronson-rhodiola",
      "extractMg": 1000,
      "servings": 60,
      "price": 9.99,
      "costPerDay": 0.17,
      "standardization": "0.5% rosavins (well below the ~3% benchmark); salidroside not disclosed",
      "verdict": "sub-potency",
      "rosavinDisclosed": true,
      "rosavinMgPerServing": 5,
      "costPerMgRosavin": 0.034,
      "thirdParty": false
    },
    {
      "brand": "Zazzee",
      "product": "Organic Rhodiola 10:1 Extract",
      "slug": "zazzee-rhodiola-10x",
      "extractMg": 300,
      "servings": 120,
      "price": 26.97,
      "costPerDay": 0.22,
      "standardization": "10:1 extract ratio only; rosavin/salidroside % NOT disclosed",
      "verdict": "ratio-only",
      "rosavinDisclosed": false,
      "rosavinMgPerServing": null,
      "costPerMgRosavin": null,
      "thirdParty": false
    },
    {
      "brand": "Life Extension",
      "product": "Rhodiola Extract 250 mg",
      "slug": "life-extension-rhodiola-250",
      "extractMg": 250,
      "servings": 60,
      "price": 13.5,
      "costPerDay": 0.23,
      "standardization": "3% rosavins / NLT 1% salidroside (3:1, disclosed)",
      "verdict": "rosavin-standard",
      "rosavinDisclosed": true,
      "rosavinMgPerServing": 7.5,
      "costPerMgRosavin": 0.031,
      "thirdParty": false
    },
    {
      "brand": "Pure Encapsulations",
      "product": "Rhodiola Rosea 100 mg",
      "slug": "pure-encapsulations-rhodiola-100",
      "extractMg": 100,
      "servings": 90,
      "price": 23.5,
      "costPerDay": 0.26,
      "standardization": "3% rosavins / 1% salidroside (3:1, disclosed)",
      "verdict": "rosavin-standard",
      "rosavinDisclosed": true,
      "rosavinMgPerServing": 3,
      "costPerMgRosavin": 0.087,
      "thirdParty": false
    },
    {
      "brand": "Momentous",
      "product": "Rhodiola Rosea 100 mg",
      "slug": "momentous-rhodiola-100",
      "extractMg": 100,
      "servings": 60,
      "price": 19.95,
      "costPerDay": 0.33,
      "standardization": "3% rosavins / 2% salidroside (disclosed) + NSF Certified for Sport",
      "verdict": "rosavin-standard",
      "rosavinDisclosed": true,
      "rosavinMgPerServing": 3,
      "costPerMgRosavin": 0.11,
      "thirdParty": true
    },
    {
      "brand": "Thorne",
      "product": "Rhodiola 100 mg",
      "slug": "thorne-rhodiola-100",
      "extractMg": 100,
      "servings": 60,
      "price": 24,
      "costPerDay": 0.4,
      "standardization": "3% rosavins / 1% salidroside (3:1, disclosed)",
      "verdict": "rosavin-standard",
      "rosavinDisclosed": true,
      "rosavinMgPerServing": 3,
      "costPerMgRosavin": 0.133,
      "thirdParty": false
    },
    {
      "brand": "Gaia Herbs",
      "product": "Rhodiola Rosea",
      "slug": "gaia-rhodiola",
      "extractMg": 120,
      "servings": 120,
      "price": 49.49,
      "costPerDay": 0.41,
      "standardization": "6 mg rosavins per serving (mg-only, no %); salidroside not disclosed",
      "verdict": "rosavin-forward-mg",
      "rosavinDisclosed": true,
      "rosavinMgPerServing": 6,
      "costPerMgRosavin": 0.068,
      "thirdParty": false
    },
    {
      "brand": "NOW Foods",
      "product": "NOW Rhodiola 500 mg",
      "slug": "now-rhodiola-500",
      "extractMg": 500,
      "servings": 60,
      "price": 24.99,
      "costPerDay": 0.42,
      "standardization": "3% rosavins / 1% salidroside min (3:1, disclosed)",
      "verdict": "rosavin-standard",
      "rosavinDisclosed": true,
      "rosavinMgPerServing": 15,
      "costPerMgRosavin": 0.028,
      "thirdParty": false
    },
    {
      "brand": "Toniiq",
      "product": "Triple-Strength Rhodiola 600 mg",
      "slug": "toniiq-rhodiola-600",
      "extractMg": 600,
      "servings": 60,
      "price": 24.97,
      "costPerDay": 0.42,
      "standardization": "5% salidroside; rosavins NOT disclosed (salidroside-forward — substitution red flag)",
      "verdict": "salidroside-forward",
      "rosavinDisclosed": false,
      "rosavinMgPerServing": null,
      "costPerMgRosavin": null,
      "thirdParty": true
    },
    {
      "brand": "Nootropics Depot",
      "product": "Rhodiola Rosea 500 mg (3% Rosavins)",
      "slug": "nootropics-depot-rhodiola-500",
      "extractMg": 500,
      "servings": 60,
      "price": 30.99,
      "costPerDay": 0.52,
      "standardization": "3% rosavins / 1% salidroside (3:1, disclosed) + published per-lot COA",
      "verdict": "rosavin-standard",
      "rosavinDisclosed": true,
      "rosavinMgPerServing": 15,
      "costPerMgRosavin": 0.035,
      "thirdParty": true
    }
  ]
}