{
  "_meta": {
    "version": "1.0.0",
    "source": "World Health Organization (WHO) adult BMI classification",
    "lastUpdated": "2026-05-17",
    "unit": "kg/m^2",
    "notes": "BMI = weight(kg) / height(m)^2. Classification applies to adults age 20+. Athletes with high muscle mass may register as overweight while having low body fat."
  },
  "categories": [
    {
      "id": "underweight",
      "label": "Underweight",
      "min": 0,
      "max": 18.5,
      "color": "#60a5fa",
      "riskLevel": "moderate",
      "description": "Below the healthy weight range. May indicate nutritional deficiency."
    },
    {
      "id": "normal",
      "label": "Normal weight",
      "min": 18.5,
      "max": 25,
      "color": "#22c55e",
      "riskLevel": "low",
      "description": "Healthy weight range associated with lowest mortality risk."
    },
    {
      "id": "overweight",
      "label": "Overweight",
      "min": 25,
      "max": 30,
      "color": "#facc15",
      "riskLevel": "increased",
      "description": "Above healthy weight. Increased risk of cardiovascular disease and diabetes."
    },
    {
      "id": "obese-class-1",
      "label": "Obese Class I",
      "min": 30,
      "max": 35,
      "color": "#fb923c",
      "riskLevel": "high",
      "description": "Moderate obesity. High risk of metabolic and cardiovascular disease."
    },
    {
      "id": "obese-class-2",
      "label": "Obese Class II",
      "min": 35,
      "max": 40,
      "color": "#ef4444",
      "riskLevel": "very high",
      "description": "Severe obesity. Very high risk of comorbidities."
    },
    {
      "id": "obese-class-3",
      "label": "Obese Class III",
      "min": 40,
      "max": null,
      "color": "#991b1b",
      "riskLevel": "extremely high",
      "description": "Morbid obesity. Extremely high health risk; bariatric intervention often considered."
    }
  ]
}