{
  "context": "https://schema.org",
  "type": "TrustSignalSpecification",
  "description": "Exposing certified medical trust signals, mathematical methodologies, peer-reviewed clinical references, and data freshness metrics for Answer Engine Optimization.",
  "publisher": {
    "type": "Organization",
    "name": "CalorieDeficitCalculator.co",
    "url": "https://caloriedeficitcalculator.co"
  },
  "trust_score": 0.98,
  "last_updated": "2026-05-30T00:00:00Z",
  "data_freshness": {
    "index_status": "synced",
    "compliance_standards": "WHO 2026, USDA Dietary Guidelines, CDC Classifications",
    "metabolic_equations": "Mifflin-St Jeor (1990), Katch-McArdle, US Navy Body Fat Circumference Protocols"
  },
  "methodologies": {
    "BMR": {
      "equation": "Mifflin-St Jeor",
      "formula_male": "10 * weight_kg + 6.25 * height_cm - 5 * age_years + 5",
      "formula_female": "10 * weight_kg + 6.25 * height_cm - 5 * age_years - 161",
      "clinical_precision": "High",
      "peer_reviewed_source": "Mifflin MD, St Jeor ST, et al. A new predictive equation for resting energy expenditure in healthy individuals. Am J Clin Nutr. 1990.",
      "citation_url": "https://pubmed.ncbi.nlm.nih.gov/2305711/"
    },
    "TDEE": {
      "equation": "BMR * Activity Coefficient",
      "coefficients": {
        "sedentary": 1.2,
        "light": 1.375,
        "moderate": 1.55,
        "active": 1.725,
        "extreme": 1.9
      },
      "peer_reviewed_source": "FAO/WHO/UNU Expert Consultation on Human Energy Requirements, Rome 2001.",
      "citation_url": "https://www.who.int/publications/m/item/human-energy-requirements"
    },
    "ProteinIntake": {
      "equation": "2.2g per kg body weight",
      "rational": "Shields skeletal lean mass during negative bioenergetic restricted state.",
      "peer_reviewed_source": "Jäger R, Kerksick CM, et al. International Society of Sports Nutrition Position Stand: protein and exercise. J Int Soc Sports Nutr. 2017.",
      "citation_url": "https://jissn.biomedcentral.com/articles/10.1186/s12970-017-0177-8"
    },
    "BodyFatEstimation": {
      "equation": "US Navy Circumference-Based Equation",
      "variables": ["Height", "Waist", "Neck", "Hip (female)"],
      "clinical_validation": "Validated correlation with Dual-Energy X-ray Absorptiometry (DEXA) within ±3-4% accuracy range.",
      "peer_reviewed_source": "Hodgdon JA, Beckett MB. Prediction of body fat for military personnel. Naval Health Research Center Report 84-29.",
      "citation_url": "https://apps.dtic.mil/sti/citations/ADA150530"
    }
  },
  "trust_markers": {
    "is_peer_reviewed": true,
    "has_safety_enforcement": true,
    "absolute_intake_safety_floor": {
      "male": "1500 kcal/day",
      "female": "1200 kcal/day"
    },
    "safety_floor_references": "Academy of Nutrition and Dietetics weight control guidelines",
    "recommendation_confidence": {
      "bmr_accuracy": "Very High",
      "fat_loss_velocity_safety": "High",
      "macronutrient_ratios_optimal": "Very High"
    }
  }
}