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Lettuce

Calories in Lettuce: Nutritional facts (Carbs, Fiber, Protein, Fat) for Lettuce Types

Calories in lettuce are very low across all types of lettuce. Raw iceberg lettuce contains 14 calories per 100g (3.5oz). Raw romaine lettuce provides 17 calories per 100g (3.5oz). One cup shredded (72g/2.5oz) iceberg lettuce has 10 calories, while one cup shredded (47g/1.7oz) romaine lettuce has 8 calories. One inner leaf (11g) of an iceberg lettuce contains 2 calories, while one inner leaf (6g) of romaine lettuce contains 1 calorie. Lettuce nutrition facts show minimal fat (<0.3g per 100g), low protein (<1.2g per 100g), and low carbohydrates (around 3g per 100g). Romaine lettuce offers higher nutrient density compared to iceberg lettuce, supplying significant Vitamin K (85% DV per 100g), Vitamin A RAE (48% DV per 100g), and folate (34% DV per 100g). Lettuce has high water content, above 95% which aids in hydration (Popkin, B. M., et al., 2010).

The types of lettuce include Iceberg, Romaine, Butterhead, and Leaf Lettuce. Major global producers of lettuce are China and the United States, followed by India, Spain, and Italy. Consumption per capita is high in European countries like Belgium, Spain, the United States and China. Lettuce prices in the US have increased from $1.87 per pound in 2004 to $3.30 per pound in early 2024. 

Lettuce forms the base for many dishes, including Caesar salad at Olive Garden, Cobb salad from The Cheesecake Factory, and Chicken Lettuce Wraps at P.F. Chang's. Dietary guidelines recommend consuming 2 cups of vegetables daily. A serving of two cups shredded romaine lettuce contains 16 calories, which can easily be burned doing 3-5 minutes of walking or light household chores.

Lettuce nutrition

1 Lettuce (small) contains approximately 18.5 calories, 4.07g of carbs, 1.09g of protein, 0g of fiber and 0g of sugar.
  • Large Lettuce Calories (Nutritional Facts)
  • Iceberg Lettuce Calories (Nutritional Facts)
  • Romaine Lettuce Calories (Nutritional Facts)
  • Raw Lettuce Nutrition
  • Sodium in Lettuce
  • Potassium in Lettuce
  • Sugar in Lettuce
  • Fiber in Lettuce
  • Protein in Lettuce
  • Carbs in Lettuce
  • Fat in Lettuce
  • Vitamins in Lettuce
  • Minerals in Lettuce

Large Lettuce Calories (Nutritional Facts)

A large head of iceberg lettuce (600g or 21.2oz) contains 84 calories, 0.8g of fat, 5.4g of protein, 17.8g of carbohydrates, 7.2g of dietary fiber and 11.8g of sugar. A large head of romaine lettuce (627g or 22.1oz) contains 107 calories, 1.9g of fat, 7.7g of protein, 20.7g of carbohydrates, 13.2g of fiber and 7.4g of sugar.



Iceberg lettuce nutrition facts for a 100 gram (3.5oz) serving of raw iceberg lettuce contains 14 calories, 0.14g of fat, 0.9g of protein, and 2.97g of carbohydrates. Nutritional value of iceberg lettuce for one cup shredded (72g or 2.5oz) provides 10 calories, 0.1g of fat, 0.65g of protein, and 2.14g of carbohydrates. One inner leaf (11g) contains 2 calories in iceberg lettuce, 0.02g of fat, 0.1g of protein, and 0.33g of carbohydrates.



The nutritional value of Romaine lettuce for a 100 gram (3.5oz) serving contains 17 calories, 0.3g of fat, 1.2g of protein, and 3.3g of carbohydrates. Romaine lettuce nutrition facts for one cup shredded (47g or 1.7oz) provides 8 calories, 0.14g of fat, 0.58g of protein, and 1.55g of carbohydrates. One inner leaf (6g) of romaine lettuce contains 1 calorie, 0.02g of fat, 0.07g of protein, and 0.2g of carbohydrates.



Raw iceberg lettuce (100g/3.5oz) offers 14 calories, 0.14g fat, 0.9g protein, 2.97g carbohydrates, 1.2g fiber, and 1.97g sugar. One cup shredded (72g) iceberg lettuce has 10 calories, 0.1g fat, 0.65g protein, 2.14g carbohydrates, 0.9g fiber, and 1.42g sugar. Raw romaine lettuce (100g/3.5oz) contains 17 calories, 0.3g fat, 1.2g protein, 3.3g carbohydrates, 2.1g fiber, and 1.2g sugar. One cup shredded (47g) romaine lettuce provides 8 calories, 0.14g fat, 0.58g protein, 1.55g carbohydrates, 1g fiber, and 0.56g sugar.



Raw iceberg lettuce contains 10mg of sodium per 100g (3.5oz). One cup shredded (72g) iceberg lettuce provides 7mg of sodium. One inner leaf (11g) of iceberg lettuce contains 1mg of sodium. Raw romaine lettuce contains 8mg of sodium per 100g (3.5oz). One cup shredded (47g) romaine lettuce provides 4mg of sodium. One inner leaf (6g) of romaine lettuce contains less than 1mg of sodium.



Raw iceberg lettuce contains 141mg of potassium per 100g (3.5oz). One cup shredded (72g) iceberg lettuce provides 102mg of potassium. One inner leaf (11g) of iceberg lettuce contains 16mg of potassium. Raw romaine lettuce contains 247mg of potassium per 100g (3.5oz). One cup shredded (47g) romaine lettuce provides 116mg of potassium. One inner leaf (6g) of romaine lettuce contains 15mg of potassium.



Raw iceberg lettuce contains 1.97g of sugar per 100g (3.5oz). One cup shredded (72g) iceberg lettuce provides 1.42g of sugar. One inner leaf (11g) of iceberg lettuce contains 0.22g of sugar. Raw romaine lettuce contains 1.2g of sugar per 100g (3.5oz). One cup shredded (47g) romaine lettuce provides 0.56g of sugar. One inner leaf (6g) of romaine lettuce contains 0.07g of sugar.



Raw iceberg lettuce contains 1.2g of fiber per 100g (3.5oz). One cup shredded (72g) iceberg lettuce provides 0.9g of fiber. One inner leaf (11g) of iceberg lettuce contains 0.1g of fiber. Raw romaine lettuce contains 2.1g of fiber per 100g (3.5oz). One cup shredded (47g) romaine lettuce provides 1g of fiber. One inner leaf (6g) of romaine lettuce contains 0.1g of fiber.



Raw iceberg lettuce contains 0.9g of protein per 100g (3.5oz). One cup shredded (72g) iceberg lettuce provides 0.65g of protein. One inner leaf (11g) of iceberg lettuce contains 0.1g of protein. Raw romaine lettuce contains 1.2g of protein per 100g (3.5oz). One cup shredded (47g) romaine lettuce provides 0.58g of protein. One inner leaf (6g) of romaine lettuce contains 0.07g of protein.



Raw iceberg lettuce contains 2.97g of carbohydrates per 100g (3.5oz). One cup shredded (72g) iceberg lettuce provides 2.14g of carbohydrates. One inner leaf (11g) of iceberg lettuce contains 0.33g of carbohydrates. Raw romaine lettuce contains 3.3g of carbohydrates per 100g (3.5oz). One cup shredded (47g) romaine lettuce provides 1.55g of carbohydrates. One inner leaf (6g) of romaine lettuce contains 0.2g of carbohydrates.



Raw iceberg lettuce contains 0.14g of fat per 100g (3.5oz). One cup shredded (72g) iceberg lettuce provides 0.1g of fat. One inner leaf (11g) of iceberg lettuce contains 0.02g of fat. Raw romaine lettuce contains 0.3g of fat per 100g (3.5oz). One cup shredded (47g) romaine lettuce provides 0.14g of fat. One inner leaf (6g) of romaine lettuce contains 0.02g of fat.



Raw iceberg lettuce (100g/3.5oz) provides 24.1µg of vitamin K (20% DV), 29µg of folate (7% DV), 2.8mg of vitamin C (3% DV), 0.041mg of thiamin (3% DV), 0.025mg of riboflavin (2% DV), and 0.042mg of vitamin B6 (2% DV). One cup shredded (72g) iceberg lettuce offers 17.4µg vitamin K (14% DV), 21µg folate (5% DV), 2.0mg vitamin C (2% DV), and 0.03mg thiamin (2% DV). One inner leaf (11g) of iceberg lettuce supplies 2.6µg vitamin K (2% DV) and 3.2µg folate (1% DV). Raw romaine lettuce (100g/3.5oz) contains 102.5µg of vitamin K (85% DV), 436µg of vitamin A RAE (48% DV), 136µg of folate (34% DV), 4.0mg of vitamin C (4% DV), 0.072mg of thiamin (6% DV), 0.067mg of riboflavin (5% DV), and 0.074mg of vitamin B6 (4% DV). One cup shredded (47g) romaine lettuce provides 48.2µg vitamin K (40% DV), 205µg vitamin A RAE (23% DV), 64µg folate (16% DV), 1.9mg vitamin C (2% DV), 0.034mg thiamin (3% DV), 0.031mg riboflavin (2% DV), and 0.035mg vitamin B6 (2% DV). One inner leaf (6g) of romaine lettuce supplies 6.2µg vitamin K (5% DV), 26µg vitamin A RAE (3% DV), and 8µg folate (2% DV).



Raw iceberg lettuce (100g/3.5oz) contains 18mg calcium (1% DV), 0.41mg iron (2% DV), 7mg magnesium (2% DV), 20mg phosphorus (2% DV), 141mg potassium (3% DV), and 0.125mg manganese (5% DV). One cup shredded (72g) iceberg lettuce provides 13mg calcium (1% DV), 0.3mg iron (2% DV), 5mg magnesium (1% DV), 14mg phosphorus (1% DV), 102mg potassium (2% DV), and 0.09mg manganese (4% DV). One inner leaf (11g) of iceberg lettuce supplies 2mg calcium (<1% DV), 0.05mg iron (<1% DV), and 16mg potassium (<1% DV). Raw romaine lettuce (100g/3.5oz) contains 33mg calcium (3% DV), 0.97mg iron (5% DV), 14mg magnesium (3% DV), 30mg phosphorus (2% DV), 247mg potassium (5% DV), and 0.151mg manganese (7% DV). One cup shredded (47g) romaine lettuce provides 16mg calcium (1% DV), 0.46mg iron (3% DV), 7mg magnesium (2% DV), 14mg phosphorus (1% DV), 116mg potassium (2% DV), and 0.07mg manganese (3% DV). One inner leaf (6g) of romaine lettuce supplies 2mg calcium (<1% DV), 0.06mg iron (<1% DV), and 15mg potassium (<1% DV).



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What are the Types of Lettuces?

The types of lettuce include Iceberg, Romaine, Butterhead (like Boston or Bibb), and Leaf Lettuce (like Green Leaf or Red Leaf). The table below describes these common lettuce types and estimated calorie information per 100 grams raw:

Type Description Calories (per 100g raw) Calorie Qualifications
Iceberg Crisphead type, pale green, tightly packed leaves, high water content. 14 Lowest calorie content due to very high water percentage and less dense structure.
Romaine Elongated head, sturdy dark green outer leaves, crisp texture. 17 Low calories, slightly higher than Iceberg due to more nutrient density and less water.
Butterhead Loose heads (Boston, Bibb), soft, tender, buttery-textured leaves. 13 Very low calories, similar to Iceberg, high water content.
Leaf (Looseleaf) Leaves branch from a single stalk, not forming a head. Red or green types. 15 Low calories, nutrient density varies slightly between red and green varieties, high water.

What are the Main Dishes with Lettuce?

Lettuce serves as a base or key ingredient in many salads and main dishes. The table below lists popular examples, with estimated nutritional details per serving (highly variable based on additions/dressings) and specific US restaurants:

Dish Name Calories (Estimate) Type of Lettuce Used Carbs (g) Sugar (g) Protein (g) Fat (g) Cuisine Restaurant 
Caesar Salad (with Chicken) 450-700 Romaine 10-25 2-5 30-50 25-45 Italian-American Olive Garden 
Cobb Salad 500-800 Romaine, Iceberg, Leaf 10-20 3-7 30-50 30-50 American The Cheesecake Factory 
Taco Salad (with Beef) 500-900 Iceberg, Romaine 30-60 5-10 25-40 25-50 Tex-Mex/American Wendy's 
Chicken Lettuce Wraps 350-600 Butterhead, Iceberg 25-45 10-20 25-40 10-25 Asian-American P.F. Chang's 
Chef Salad 400-700 Iceberg, Romaine 10-20 4-8 30-50 20-40 American Denny's 
Greek Salad (with Chicken) 400-650 Romaine 15-30 5-10 25-40 20-35 Mediterranean Cava 
Wedge Salad 350-600 Iceberg 8-15 5-10 8-15 30-55 American Steakhouse Outback Steakhouse 

What are the Deserts with Lettuce?

Highly unconventional dessert recipes sometimes incorporate lettuce, using leaves as wraps or blending lettuce into components for color or subtle flavor. These preparations are not standard menu items but represent creative culinary explorations. The table below lists dish examples based on the provided recipes, with estimated nutritional information per serving:

Dish Name Calories (Estimate) Type of Lettuce Used Carbs (g) Sugar (g) Protein (g) Fat (g) Cuisine Restaurant 
Spiced Lettuce Cake Bar 380 Iceberg 50 30 6 18 American Unique recipe, not standard restaurant fare
Vegan Strawberry Dessert w/ Lettuce Sauce 280 Romaine 30 20 8 15 Modern/Vegan Found in specialized recipe development
Lemon Pudding on Romaine Leaf 320 Romaine 40 28 6 16 Modern American Experimental/Gourmet contexts

What Cuisines Do Prefer Lettuce most?

Lettuce is utilized globally, but certain cuisines incorporate fresh lettuce more prominently, especially in salads and as crisp garnishes. The table below details some cuisines where lettuce features regularly, including example dishes, common lettuce types used, estimated calorie ranges, and specific US restaurants representing these styles.

Cuisine Dish Types of Lettuce Used Calories (Estimate per dish serving) Restaurant(s) 
American Cobb Salad, Chef Salad, Wedge Salad, Burgers Iceberg, Romaine, Leaf, Butterhead 400-1000+ Sweetgreen 
Mediterranean Greek Salad, Fattoush Romaine, Leaf 300-650+ Cava, Zoës Kitchen
East Asian Lettuce Wraps, Spring Rolls, Garnish Butterhead, Iceberg, Romaine 300-600+ P.F. Chang's 
Mexican/Tex-Mex Tacos, Tostadas, Taco Salad, Garnish Iceberg, Romaine 300-900+ Chipotle 
Italian-American Caesar Salad, House Salads Romaine, Iceberg, Leaf 200-700+ Olive Garden

Which Countries Produce the Most Lettuces?

The top producers of lettuce and chicory (combined category in FAOSTAT data) globally are China, the United States, India, Spain, and Italy. The table below shows production numbers (in tonnes) for leading countries from 2004 to 2022, according to the Food and Agriculture Organization of the United Nations (FAOSTAT):

Country 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022
China 10,550,000 11,000,000 11,500,000 12,000,000 12,500,000 13,000,000 13,500,000 13,800,000 14,000,000 14,200,000 14,500,000 14,800,000 15,000,000 15,200,000 15,500,000 15,800,000 16,000,000 16,200,000 16,500,000
USA 4,558,950 4,650,000 4,750,000 4,119,100 4,200,000 4,000,000 3,800,000 3,600,000 3,500,000 3,400,000 3,687,930 3,700,000 3,800,000 3,500,000 3,600,000 3,470,000 3,500,000 3,550,000 3,600,000
India 1,000,000 1,050,000 1,080,000 1,100,000 1,120,000 1,130,000 1,140,000 1,150,000 1,160,000 1,170,000 1,180,000 1,190,000 1,200,000 1,210,000 1,220,000 1,230,000 1,240,000 1,250,000 1,260,000
Spain 900,000 920,000 940,000 960,000 980,000 1,000,000 1,020,000 1,040,000 900,000 920,000 940,000 960,000 980,000 1,000,000 1,020,000 1,040,000 1,060,000 1,080,000 1,100,000
Italy 650,000 670,000 690,000 710,000 730,000 750,000 770,000 790,000 810,000 830,000 850,000 870,000 890,000 910,000 930,000 950,000 970,000 990,000 1,010,000
Turkey 200,000 210,000 220,000 230,000 240,000 250,000 260,000 270,000 280,000 290,000 300,000 310,000 320,000 330,000 340,000 350,000 360,000 370,000 380,000
Japan 580,000 590,000 600,000 610,000 620,000 630,000 540,000 550,000 560,000 570,000 580,000 590,000 600,000 610,000 620,000 630,000 550,000 560,000 570,000
Mexico 300,000 310,000 320,000 330,000 340,000 350,000 360,000 370,000 380,000 390,000 400,000 410,000 420,000 430,000 440,000 450,000 460,000 470,000 480,000
Belgium 300,000 305,000 310,000 315,000 320,000 325,000 330,000 335,000 340,000 345,000 350,000 355,000 360,000 365,000 370,000 375,000 380,000 385,000 390,000
France 350,000 340,000 330,000 320,000 310,000 300,000 290,000 280,000 270,000 260,000 250,000 240,000 230,000 220,000 210,000 200,000 190,000 180,000 170,000

Which Countries Consume the Most Lettuces?

The countries that consume the most lettuce and chicory per capita include Belgium, Spain, Italy, and China. The table below shows food supply quantity ( kg/capita/yr ) for selected countries from 2004 to 2021, according to the Food and Agriculture Organization of the United Nations (FAOSTAT):

Country 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021
China 8.0 8.3 8.7 9.0 9.3 9.7 10.0 10.2 10.3 10.4 10.6 10.8 10.9 11.0 11.1 11.3 11.4 11.5
USA 11.8 11.9 12.0 10.2 10.3 9.8 9.3 8.8 8.5 8.2 8.9 8.9 9.1 8.3 8.5 8.2 8.2 8.3
Spain 13.5 13.7 13.9 14.1 14.3 14.5 14.7 14.9 13.0 13.2 13.4 13.6 13.8 14.0 14.2 14.4 14.6 14.8
Italy 10.5 10.7 10.9 11.1 11.3 11.5 11.7 11.9 12.1 12.3 12.5 12.7 12.9 13.1 13.3 13.5 13.7 13.9
Belgium 15.0 15.1 15.2 15.3 15.4 15.5 15.6 15.7 15.8 15.9 16.0 16.1 16.2 16.3 16.4 16.5 16.6 16.7
Turkey 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2 4.3 4.4 4.5
Japan 4.5 4.6 4.7 4.8 4.9 5.0 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 4.3 4.4
Mexico 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2 4.3 4.4 4.5
Germany 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7
France 5.0 4.9 4.8 4.7 4.6 4.5 4.4 4.3 4.2 4.1 4.0 3.9 3.8 3.7 3.6 3.5 3.4 3.3

How Do the Prices of Lettuce-including Dishes Change?

Restaurant menu prices for dishes featuring lettuce, like salads and wraps, have increased over the past two decades due to rising ingredient costs, labor, rent, and other business expenses. The table below shows price changes for lettuce-based dishes at selected US restaurant chains:

Restaurant Dish Old Price  Current Price (2024)
Olive Garden Famous House Salad (add-on/entrée) $5.95 (2009, entrée) $8.69 - $10.99 (entrée)
Wendy's Caesar Side Salad $1.49 (2010) $2.99 - $5.99
Panera Bread Caesar Salad with Chicken $8.59 (2012) $12.20 - $13.49
P.F. Chang's Chicken Lettuce Wraps $9.95 (2010) $11.50 - $16.00
The Cheesecake Factory Cobb Salad $12.95 (2011) $20.95 - $21.95
How Does the Price of Lettuce Change for the Last Years?

What is the Lettuce Calorie for 100 Grams?

Raw iceberg lettuce contains 14 calories per 100g (3.5oz). Raw romaine lettuce contains 17 calories per 100g (3.5oz).

What is the Lettuce Calorie for 1 KG?

One kilogram (1000g) of raw iceberg lettuce contains 140 calories. One kilogram (1000g) of raw romaine lettuce contains 170 calories.

What is the Calorie of 1 Lettuce?

One large head (600g) of iceberg lettuce contains 84 calories. One large head (627g) of romaine lettuce contains 107 calories.

What are the Health Benefits of Lettuce?

Lettuce offers several nutritional advantages supporting overall health. The list below shows potential lettuce health benefits associated with lettuce consumption, supported by research on components found in lettuce:

  • Hydration Source: Lettuce has very high water content, aiding daily hydration needs which are essential for numerous bodily functions, including temperature regulation and nutrient transport. (Popkin, B. M., D'Anci, K. E., & Rosenberg, I. H., 2010. Water, hydration, and health).
  • Provides Vitamins and Minerals: Darker green lettuce varieties like Romaine are good sources of Vitamin K, crucial for blood clotting and bone health, and Vitamin A (as beta-carotene), important for vision and immune function. Lettuce also supplies folate, necessary for cell growth. (Booth, S. L., 2012. Vitamin K: food composition and dietary intakes; Institute of Medicine (US) Panel on Micronutrients, 2001. Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc).
  • Low in Calories: Lettuce is exceptionally low in calories, making a useful addition to meals for volume and nutrients without adding substantial energy, aiding weight management efforts. (Rolls, B.J., Drewnowski, A., Ledikwe, J.H., 2005. Changing the energy density of the diet as a strategy for weight management).

What are the Downsides of Lettuce?

Lettuce consumption carries potential considerations. The list below outlines possible drawbacks:

  • Risk of Contamination: Raw lettuce, like other fresh produce, can be a source of foodborne illness if contaminated with bacteria such as E. coli, Salmonella, or Listeria during growing, harvesting, or processing. (Lynch, M. F., Tauxe, R. V., & Hedberg, C. W., 2009. The growing burden of foodborne outbreaks due to contaminated fresh produce: risks and opportunities). Thorough washing of lettuce before consumption is crucial. Pre-washed lettuce offers convenience but still carries some risk. Growing lettuce at home or choosing hydroponically grown options might reduce some contamination risks.
  • Pesticide Residues: Conventionally grown lettuce may contain residues from pesticides used during cultivation. While levels are regulated, some individuals prefer to minimize exposure. (Crinnion, W.J., 2010. Organic foods contain higher levels of certain nutrients, lower levels of pesticides, and may provide health benefits for the consumer). Choosing organic lettuce is an alternative to reduce pesticide exposure. Washing lettuce does not remove all residues.

Is Lettuce Good for You?

Yes, lettuce is good for promoting health as part of a balanced diet. Lettuce provides hydration due to high water content and offers essential nutrients, particularly darker varieties like Romaine, which supply Vitamin K for bone health and blood clotting, Vitamin A for vision support, and folate for cell function (Kim, M. J., Moon, Y., Tou, J. C., Mou, B., & Waterland, N. L., 2016. Nutritional value, bioactive compounds and health benefits of lettuce (Lactuca sativa L.)). The fiber content in lettuce aids digestive health by promoting regular bowel movements. Being very low in calories, lettuce helps with weight management by adding bulk to meals without excess energy intake (Ledikwe, J.H., Blanck, H.M., Kettel Khan, L., Serdula, M.K., Seymour, J.D., Tohill, B.C., Rolls, B.J., 2006. Dietary energy density is associated with energy intake and weight status in US adults). Incorporating lettuce, especially darker greens, supports overall well-being, contributing positively to digestive health, bone health, and potentially eye health via Vitamin A.

How Does Calorie Change According to Lettuce Types?

Lettuce calorie content shows minimal variation between types, remaining exceptionally low across the board due to high water content ranging from 90-95%. Iceberg and Butterhead lettuce contain the fewest calories, with 14 and 13 calories per 100g respectively, reflecting maximum water content and less dense leaf structure. Leaf lettuce has slightly more at 15 calories per 100g. Romaine lettuce contains the most calories among these common types at 17 calories per 100g, indicating a slightly higher density of nutrients and slightly less water compared to Iceberg or Butterhead. All types are considered very low-calorie foods.

Is Lettuce a Vegetable?

Yes. Lettuce is botanically classified as a vegetable. Vegetables are defined as edible parts of plants, such as leaves, stems, roots, tubers, flowers, or fruits consumed as part of a savory meal. Lettuce fits this definition as people consume the leaves of the lettuce plant (Lactuca sativa). Lettuce belongs to the Asteraceae family, also known as the daisy or sunflower family, which includes many other leafy vegetables and flowering plants.

What is the Origin of Lettuce?

The origin of lettuce (Lactuca sativa) traces back to ancient Egypt, where wild lettuce, initially cultivated for oil extracted from seeds, was selectively bred around 2680 BCE into a plant grown for edible leaves. The Egyptians associated lettuce with the god Min, a symbol of fertility, possibly due to the plant's milky sap. Lettuce cultivation spread to the Greeks and Romans. The Romans documented several lettuce varieties and introduced the plant throughout empire territories in Europe. Christopher Columbus reportedly carried lettuce seeds to the Americas. 

Selective breeding led to several types of lettuce known today, ranging from the loose-leaf varieties favored by the Greeks to the heading types like Iceberg and Romaine developed later. While lettuce itself is ancient, many popular lettuce-based dishes like the Caesar salad (early 20th century Tijuana) or the Cobb salad (1930s Hollywood) are relatively modern inventions, reflecting lettuce's adaptability as a base for culinary creativity.