Are there calories in lettuce?

so here is my ? is there calories in lettuce or is it negative cals???

Lettuce (butterhead):

Nutritional value per 100 g (3.5 oz)
Energy 10 kcal 60 kJ
Carbohydrates 2.2 g
- Dietary fibre 1.1 g
Fat 0.2 g
Protein 1.4 g
Water 96 g
Vitamin A equiv. 166 μg 18%
Folate (Vit. B9) 73 μg 18%
Vitamin C 4 mg 7%
Vitamin K 24 μg 23%
Iron 1.2 mg 10%

Vit. K[1]
Percentages are relative to US
recommendations for adults.
Source: USDA Nutrient database

I looked at a list of negative calorie foods, and I didn't see lettuce. Here's the list that I checked:

http://weightlossinternational.com/newsletter/free-list-of-negative-calorie-foods.html

Good Luck!

my doc says that I can eat all the lettuce that I want, its what I put on it that makes me gain. he says 'eat yourself silly' with fresh vegetables. I do, and love the salad spritzers which are like 1 or 2 calories per spray. it gives it a little flavor anyway.