{
  "name": "Verified Supplement Data — Population × Ingredient Need Crosswalk v1",
  "description": "Which populations (life-stage, diet, post-surgical, medication-driven) are at elevated deficiency risk for which nutrients, with prevalence ranges and what the risk compounds with. Powers demographic landing pages and personalization.",
  "license": "CC BY 4.0",
  "source": "verifiedsupplementdata.com",
  "rows": [
    {
      "population": "Adults 65+",
      "population_id": "elderly",
      "ingredient_id": "calcium",
      "ingredient": "Calcium",
      "deficiency_prevalence": "30-40%",
      "mechanism": "Reduced absorption + vitamin D deficiency",
      "compounds_with": "ppi",
      "source": "matrix.population_risks",
      "source_url": ""
    },
    {
      "population": "Adults 65+",
      "population_id": "elderly",
      "ingredient_id": "vitamin-b12",
      "ingredient": "Vitamin B12",
      "deficiency_prevalence": "10-30%",
      "mechanism": "Atrophic gastritis reduces acid + intrinsic factor",
      "compounds_with": "ppi,metformin",
      "source": "matrix.population_risks",
      "source_url": ""
    },
    {
      "population": "Adults 65+",
      "population_id": "elderly",
      "ingredient_id": "vitamin-d",
      "ingredient": "Vitamin D",
      "deficiency_prevalence": "40-60%",
      "mechanism": "Reduced skin synthesis + less outdoor exposure",
      "compounds_with": "",
      "source": "matrix.population_risks",
      "source_url": ""
    },
    {
      "population": "Gastric Bypass (RNY)",
      "population_id": "bariatric-rny",
      "ingredient_id": "calcium",
      "ingredient": "Calcium",
      "deficiency_prevalence": "50-60%",
      "mechanism": "Duodenal bypass + vitamin D malabsorption",
      "compounds_with": "",
      "source": "matrix.population_risks",
      "source_url": "/protocols/bariatric/gastric-bypass/"
    },
    {
      "population": "Gastric Bypass (RNY)",
      "population_id": "bariatric-rny",
      "ingredient_id": "iron",
      "ingredient": "Iron",
      "deficiency_prevalence": "20-55%",
      "mechanism": "Duodenum bypassed — primary absorption site lost",
      "compounds_with": "",
      "source": "matrix.population_risks",
      "source_url": "/protocols/bariatric/gastric-bypass/"
    },
    {
      "population": "Gastric Bypass (RNY)",
      "population_id": "bariatric-rny",
      "ingredient_id": "vitamin-b12",
      "ingredient": "Vitamin B12",
      "deficiency_prevalence": "33-70%",
      "mechanism": "Intrinsic factor production eliminated",
      "compounds_with": "metformin",
      "source": "matrix.population_risks",
      "source_url": "/protocols/bariatric/gastric-bypass/"
    },
    {
      "population": "Gastric Bypass (RNY)",
      "population_id": "bariatric-rny",
      "ingredient_id": "vitamin-d",
      "ingredient": "Vitamin D",
      "deficiency_prevalence": "50-60%",
      "mechanism": "Fat malabsorption reduces D3 uptake",
      "compounds_with": "",
      "source": "matrix.population_risks",
      "source_url": "/protocols/bariatric/gastric-bypass/"
    },
    {
      "population": "Menstruating Women",
      "population_id": "menstruating",
      "ingredient_id": "iron",
      "ingredient": "Iron",
      "deficiency_prevalence": "10-30%",
      "mechanism": "Monthly blood loss depletes iron stores",
      "compounds_with": "",
      "source": "matrix.population_risks",
      "source_url": "/symptoms/heavy-periods/"
    },
    {
      "population": "Pregnant Women",
      "population_id": "pregnant",
      "ingredient_id": "folate",
      "ingredient": "Folate / Methylfolate",
      "deficiency_prevalence": "Critical",
      "mechanism": "Neural tube formation requires folate by day 28",
      "compounds_with": "",
      "source": "matrix.population_risks",
      "source_url": "/protocols/prenatal/"
    },
    {
      "population": "Pregnant Women",
      "population_id": "pregnant",
      "ingredient_id": "iron",
      "ingredient": "Iron",
      "deficiency_prevalence": "20-55%",
      "mechanism": "Increased demand + blood volume expansion",
      "compounds_with": "ppi",
      "source": "matrix.population_risks",
      "source_url": "/protocols/prenatal/"
    },
    {
      "population": "Pregnant Women",
      "population_id": "pregnant",
      "ingredient_id": "vitamin-b12",
      "ingredient": "Vitamin B12",
      "deficiency_prevalence": "10-30%",
      "mechanism": "Increased demand for fetal neurological development",
      "compounds_with": "metformin",
      "source": "matrix.population_risks",
      "source_url": "/protocols/prenatal/"
    },
    {
      "population": "Pregnant Women",
      "population_id": "pregnant",
      "ingredient_id": "vitamin-d",
      "ingredient": "Vitamin D",
      "deficiency_prevalence": "40-60%",
      "mechanism": "Fetal bone development + immune programming",
      "compounds_with": "",
      "source": "matrix.population_risks",
      "source_url": "/protocols/prenatal/"
    },
    {
      "population": "Vegans/Vegetarians",
      "population_id": "vegan",
      "ingredient_id": "iron",
      "ingredient": "Iron",
      "deficiency_prevalence": "20-40%",
      "mechanism": "Non-heme iron has 2-20% absorption vs 15-35% heme",
      "compounds_with": "",
      "source": "matrix.population_risks",
      "source_url": "/protocols/vegan/"
    },
    {
      "population": "Vegans/Vegetarians",
      "population_id": "vegan",
      "ingredient_id": "omega-3",
      "ingredient": "Omega-3 (EPA/DHA)",
      "deficiency_prevalence": "Common",
      "mechanism": "No EPA/DHA in plant diet; ALA conversion is 5-10%",
      "compounds_with": "",
      "source": "matrix.population_risks",
      "source_url": "/protocols/vegan/"
    },
    {
      "population": "Vegans/Vegetarians",
      "population_id": "vegan",
      "ingredient_id": "vitamin-b12",
      "ingredient": "Vitamin B12",
      "deficiency_prevalence": "40-90%",
      "mechanism": "No dietary B12 in plant foods",
      "compounds_with": "",
      "source": "matrix.population_risks",
      "source_url": "/protocols/vegan/"
    },
    {
      "population": "Vegans/Vegetarians",
      "population_id": "vegan",
      "ingredient_id": "zinc",
      "ingredient": "Zinc",
      "deficiency_prevalence": "20-30%",
      "mechanism": "Phytates in plant foods inhibit zinc absorption",
      "compounds_with": "",
      "source": "matrix.population_risks",
      "source_url": "/protocols/vegan/"
    }
  ]
}