01
Why people use it
A loose-leaf, non-heading lettuce variety with meaningfully more vitamin A and vitamin K than iceberg lettuce, though somewhat less than romaine.
- ✓Everyday leafy-green nutrition
- ✓Vitamin K and A intake
- ✓Low-calorie salad base
02
What the evidence says
Leaf lettuce's primary evidence base is compositional: USDA nutrient analysis shows meaningful vitamin K and vitamin A content relative to its very low calorie count -- genuinely higher than iceberg lettuce, comparable in category to romaine though with a somewhat lower vitamin K and folate concentration. This describes established nutrient composition, not a clinical claim about treating or preventing a specific condition.
Hover, focus or tap each label for context.
These labels summarize the available context; they are not a clinical recommendation.03
Common forms
Hover, focus or tap a form to see what it means.
04
Food and nutrition context
Raw green leaf lettuce is very low in calories while carrying meaningful vitamin K and vitamin A content relative to that calorie count. The reference panel below uses 100 g of raw green leaf lettuce (USDA FoodData Central, FDC 169249).
- Total fat
- 0.15 g0% DV
- Sodium
- 28 mg1% DV
- Total carbohydrate
- 2.79 g1% DV
- Dietary fiber
- 1.3 g5% DV
- Protein
- 1.36 g
- Vitamin K
- 126 mcg105% DV
- Vitamin A
- 370 mcg RAE41% DV
- Vitamin C
- 18 mg20% DV
- Folate
- 38 mcg10% DV
- Iron
- 0.86 mg5% DV
- Potassium
- 194 mg4% DV
- Calcium
- 36 mg3% DV
Percent Daily Values use current FDA adult reference values for a 2,000-calorie diet.
USDA FoodData Central, FDC 169249 ↗Source checked September 13, 2026. Values are rounded.Safety note
Know before you use it
Leaf lettuce carries a meaningful vitamin K content, worth a consistent-intake note for people on warfarin or other vitamin K-sensitive blood thinners, though its concentration is somewhat lower than romaine and considerably lower than kale, chard or collards.
Sources & review
- FoodData Central: Lettuce, green leaf, raw (FDC 169249)U.S. Department of Agriculture
- Vitamin K and Coumadin (Warfarin)NIH Office of Dietary Supplements