Romaine Lettuce, Green, Raw — USDA FoodData Central nutrition facts (per 100g)

| Nutrient | Amount per 100g |
| --- | --- |
| Ash | 0.606 g |
| Calcium, Ca | 27.6 mg |
| Carbohydrate, by difference | 4.06 g |
| Copper, Cu | 0.049 mg |
| Energy | 20.8 kcal |
| Energy (Atwater General Factors) | 20.8 kcal |
| Energy (Atwater Specific Factors) | 17.5 kcal |
| Iron, Fe | 0.267 mg |
| Magnesium, Mg | 12 mg |
| Manganese, Mn | 0.227 mg |
| Niacin | 0.371 mg |
| Nitrogen | 0.156 g |
| Phosphorus, P | 23.4 mg |
| Potassium, K | 260 mg |
| Protein | 0.977 g |
| Sodium, Na | 23 mg |
| Thiamin | 0.063 mg |
| Total lipid (fat) | 0.071 g |
| Vitamin B-6 | 0.063 mg |
| Vitamin K (Dihydrophylloquinone) | 0 µg |
| Vitamin K (Menaquinone-4) | 0 µg |
| Vitamin K (phylloquinone) | 83.4 µg |
| Water | 94.3 g |
| Zinc, Zn | 0.252 mg |

Values are raw as published by USDA at the 100g basis — not rounded per 21 CFR 101.9(c) label-declaration rules, and 100g is USDA's publication basis, not a serving size any US nutrition label declares against.

Source: USDA FoodData Central, FDC ID 2346389, usda_ff (released 2026-04-30). https://bettermenu.live/tools/ingredient-search/us/foods/romaine-lettuce-green-raw-2346389/