{"topic_id":"usda_fdc_data_source_assessment","category":"us-2026","context":"---\ntopic_id: usda_fdc_data_source_assessment\ncategory: USDA-FDC-ASSESSMENT\ntitle: USDA FoodData Central Data Source Assessment for Pet Food\nlang: en\nsource: USDA FDC API v1 (api.nal.usda.gov/fdc/v1/)\ndate_parsed: 2026-07-18\ntokens_estimated: 600\n---\n\n# USDA FoodData Central Data Source Assessment for Pet Food\n\n## Source Value Assessment\n- ⭐ **Not recommended as primary pet food data source**\n- USDA FDC 是美国农业部主要食品成分数据库\n- 但 pet food 相关数据极少\n\n## Research Findings (2026-07-18)\n\n### API Strategy Tested\n1. ✅ `query=dog food` → 115563 hits (mostly Corn dog/Hot dog)\n2. ⚠️ `query=pet food` → 114748 hits (mostly human food)\n3. ❌ `query=kibble` → 17 hits (only bread/rye crispbread)\n4. ❌ `query=complete dog/cat` → only pancake mix, no pet food\n\n### Why Low Yield?\n1. **USDA FDC 主要为人类食品**（FNDDS Survey + Foundation Foods + SR Legacy + Branded）\n2. **Pet food 召回率 < 0.1%** of total database\n3. **关键词歧义**：\"dog\"/\"cat\" 匹配人类食品（Corn dog/Hot dog/Catfish）\n\n### API Access\n- ✅ USDA FDC API v1 公开可访问（无 key 限速 1000/h per IP）\n- ❌ Full dataset ZIP 下载链接全部 404（3 URLs tested）\n\n## Conclusion\n- **USDA FDC 不适合作为 pet food 主数据源**\n- **推荐替代**：\n  - AAFCO Official Publication (已覆盖)\n  - FEDIAF Nutritional Guidelines (已覆盖)\n  - 厂商官方营养数据 (PFI 行业)\n  - NASC 零食数据 (已覆盖)\n","sources":[],"tokens_estimated":600,"generated_at":null,"tip":"Use /api/v1/topics to discover more topics. /api/v1/nutrient for precise single-point queries. /api/v1/cross_compare for 2-3 standard comparisons."}