{
  "@context": "https://schema.org",
  "@graph": [
    {
      "@type": "Organization",
      "@id": "https://protein-fact.com/#organization",
      "name": "Protein Fact",
      "url": "https://protein-fact.com",
      "description": "プロテインに関する科学的事実を、論文・数値・製品スペックに基づいて解説する独立メディア。",
      "publishingPrinciples": "https://protein-fact.com/editorial-policy"
    },
    {
      "@type": "WebSite",
      "@id": "https://protein-fact.com/#website",
      "name": "Protein Fact",
      "url": "https://protein-fact.com",
      "publisher": {
        "@id": "https://protein-fact.com/#organization"
      },
      "inLanguage": "ja"
    },
    {
      "@type": "Article",
      "@id": "https://protein-fact.com/guides/protein-diarrhea-causes#article",
      "headline": "プロテインを飲むと下痢になるのはなぜか — 乳糖・人工甘味料・過剰摂取の3原因と対策",
      "description": "プロテインで下痢や腹痛が起きる3つの主要原因（乳糖不耐症・人工甘味料・1回あたりの過剰摂取）を論文データで解説。WPC・WPI・WPHの乳糖含有量比較と、消化器症状を減らすための具体的な選び方を整理する。",
      "datePublished": "2026-03-17T00:00:00.000Z",
      "dateModified": "2026-03-17T00:00:00.000Z",
      "keywords": "プロテイン, 下痢, 乳糖不耐症, 人工甘味料, 消化, WPH, WPI",
      "publisher": {
        "@id": "https://protein-fact.com/#organization"
      },
      "mainEntityOfPage": {
        "@id": "https://protein-fact.com/guides/protein-diarrhea-causes"
      },
      "isPartOf": {
        "@id": "https://protein-fact.com/#website"
      }
    },
    {
      "@type": "BreadcrumbList",
      "@id": "https://protein-fact.com/guides/protein-diarrhea-causes#breadcrumb",
      "itemListElement": [
        {
          "@type": "ListItem",
          "position": 1,
          "name": "Protein Fact",
          "item": "https://protein-fact.com"
        },
        {
          "@type": "ListItem",
          "position": 2,
          "name": "ガイド・比較",
          "item": "https://protein-fact.com/guides"
        },
        {
          "@type": "ListItem",
          "position": 3,
          "name": "プロテインを飲むと下痢になるのはなぜか — 乳糖・人工甘味料・過剰摂取の3原因と対策"
        }
      ]
    }
  ]
}