{"name":"nutrition-label-api","version":"1.0.0","description":"Nutrition & food-label engine: Atwater calorie math, FDA %Daily Value, full Nutrition Facts panels, macro splits, recipe aggregation, keto net carbs and serving/energy conversions. Deterministic, no DB, no external calls. %DV uses FDA 2,000 kcal reference Daily Values.","usage":"POST JSON or query params. Grams in, kcal/%DV out.","endpoints":{"POST /calories":"Atwater energy (kcal/kJ) from macros + % energy breakdown","POST /daily-value":"FDA %Daily Value from nutrient amounts (35-nutrient DV table)","POST /label":"Full Nutrition Facts panel: calories + macros + %DV per serving","POST /macro-split":"Target calories + ratio (e.g. 40/30/30) → grams per macro","POST /recipe":"Aggregate N ingredients (grams + per-100g) → total + per serving","POST /net-carbs":"Keto net carbs: total − fiber − sugar alcohols","POST /convert":"Scale nutrition per-100g ⇄ per-serving; convert kcal ⇄ kJ","GET  /reference":"Atwater factors + full FDA Daily Value table (audit)"},"example":"POST /calories {\"protein\":20,\"carbs\":30,\"fat\":10} → 290 kcal (1213.4 kJ), fat 31% of energy"}