Lettuce
Lettuce, leaf lettuce
Leaf lettuce is notable for its contentof vitamin K (phylloquinone) (100 g contains 124.6% of the daily requirement), beta-carotene (88.9%), lutein and its isomer zeaxanthin (28.8%), vitamin C (ascorbic acid) (17.3%), and folic acid (10.8%).
The most abundant minerals are: vanadium (425.0%), rubidium (153.0%), boron (121.4%), beryllium (60.0%), mercury (50.0%), silicon (43.0%), cadmium (40.0%), cobalt (40.0%), lithium (40.0%), manganese (13.8%), molybdenum (12.9%), nickel (8.5%), potassium (8.3%), cesium (7.1%).
Lettuce contains phytosterols (69.1% of the daily norm in 100 g), predominantly beta-sitosterol (57.0%).
Carbohydrates are dominated by pectin (8.0% of the daily requirement per 100 g) and fiber (5.0%). Lettuce contains a small amount of starch (0.4 g per 100 g) and practically no sucrose (0.05 g per 100 g).
The content of purine bases in 100 g of lettuce is 10.0% of the daily norm.
The oxalic acid content in 100 g is 3.0 mg, which is 0.8% of the maximum permissible daily intake (for more details, see Rhubarb).
It should also be noted that lettuce can accumulate toxic ultramicroelements such as beryllium, cadmium, mercury, and cesium.
Calories per 100 g: 15 kcal
Water per 100 g: 94.98 g
Ash per 100 g: 0.62 g
Water per 100 g: 94.98 g
Ash per 100 g: 0.62 g
CHEMICAL COMPOSITION
Vitamins, macro- and microelements, nutrients per 100 g
VITAMINS
| Name | Content, mass fraction per 100 g of product | % of daily requirement | |
| in numbers | visually | ||
| Vitamin B1 (thiamine) | 0.030-0.070 mg | 2.9 |  |
| Vitamin B2 (riboflavin) | 0.08 | 4 | |
| Vitamin B5 (pantothenic acid) | 0.100-0.130 mg | 2.3 | |
| Vitamin B6 (pyridoxine) | 0.090-0.180 mg | 6.8 | |
| Vitamin B9 (folic acid) | 38.0-48.0 mcg | 10.8 |  |
| Vitamin B12 (cyanocobalamin) | 0.0 | 0 |  |
| Vitamin C (ascorbic acid) | 9.2-15.0 mg | 17 |  |
| Vitamin E (alpha-tocopherol) | 0.22-0.70 mg | 3.1 | |
| Beta-tocopherol | 0 | 0.0 | |
| Gamma-tocopherol | 0.4 | 2.7 | |
| Delta-tocopherol | 0.0 | 0.1 | |
| Vitamin D (ergocalciferol) | 0.0 | 0 | |
| Vitamin PP (nicotinic acid) | 0.38-0.70 mg | 2.7 | |
| Vitamin K (phylloquinone) | 126.0-173.6 mcg | 124.6 |  |
| Biotin | 0.7 | 1.4 | |
| Beta-carotene | 4443.0 | 88.9 |  |
| Alpha-carotene | 0.0 | 0 | |
| Lutein + zeaxanthin | 1730.0 | 28.8 |  |
| Beta-cryptoxanthin | 0.0 | 0 | |
| Lycopene | 0.0 | 0 | |
| Choline | 13.6 | 2.7 | |
| Betaine trimethylglycine | 0.2 | 0.02 | |
| Methylmethionine sulfonium (vitamin U) | 0.3 | 0.2 | |
* Full jug – 100% of the daily norm; empty – 0-1% of the daily norm.
MINERAL ELEMENTS
Macroelements
| Name | Content, mass fraction per 100 g of product | % of daily requirement | |
| in numbers | Visually | ||
| Potassium | 194.0-220.0 mg | 8.3 | |
| Calcium | 36.0-77.0 mg | 5.1 | |
| Silicon | 8.2-17.6 mg | 43 |  |
| Magnesium | 13.0-40.0 mg | 6.6 | |
| Sodium | 8.0-28.0 mg | 1.4 | |
| Sulfur | 16 | 1.6 | |
| Phosphorus | 29.0-34.0 mg | 3.9 | |
| Chlorine | 50 | 2.2 | |
Trace elements
| Name | Content, mass fraction per 100 g of product | % of daily requirement | |
| In numbers | Visually | ||
| Aluminum | 570.0 mcg | 1.5 | |
| Beryllium | 6.0 | 60.0 |  |
| Boron | 85.0 | 121.4 | |
| Vanadium | 170.0 | 425.0 | |
| Iron | 0.60-0.86 mg | 4.9 | |
| Iodine | 8.0 | 5.3 | |
| Cadmium | 1.7-2.3 μg | 40 | |
| Cobalt | 4.0 | 40.0 | |
| Lithium | 40.0 | 40.0 | |
| Manganese | 250.0-300.0 mcg | 13.8 | |
| Copper | 30.0-120.0 μg | 7.5 | |
| Molybdenum | 9.0 | 12.9 | |
| Nickel | 8.0-17.0 μg | 8.5 | |
| Mercury | 0.5 | 50 |  |
| Rubidium | 153.0 | 153.0 | |
| Selenium | 0.600 | 0.9 | |
| Strontium | 7.9 | 1.0 | |
| Fluorine | 28.0 | 0.7 | |
| Chromium | 3.0 | 6.0 | |
| Cesium | 0.02 | 7.1 | |
| Zinc | 180.0-270.0 μg | 1.9 | |
PROTEINS AND AMINO ACIDS
| Name | Content, mass fraction per 100 g of product | % of daily allowance | |
| in numbers | visually | ||
| Total protein content | 1.36-1.50 g | 1.8 | |
| Essential amino acid content | 0.468-0.500 g | 2.2 | |
| Content of replaceable amino acids | 0.635-0.657 g | 1.1 | |
Essential amino acids
| Name of acid | Content, g per 100 g of product | % of daily requirement | |
| in numbers | Visually | ||
| Valine | 0.07 | 3.0 | |
| Histidine | 0.020-0.022 | 1 | |
| Isoleucine | 0.080-0.084 | 4.1 | |
| Leucine | 0.079-0.080 | 1.7 | |
| Lysine | 0.080-0.084 | 2 | |
| Methionine | 0.016-0.020 | 1 | |
| Threonine | 0.059-0.060 | 2.5 | |
| Tryptophan | 0.009-0.010 | 1 | |
| Phenylalanine | 0.055-0.060 | 1.9 | |
Non-essential amino acids
| Acid name | Content, g per 100 g of product | % of daily requirement | |
| in numbers | Visually | ||
| Alanine | 0.056 | 0.9 | |
| Arginine | 0.070-0.071 | 1.2 | |
| Aspartic acid | 0.140-0.142 | 1.2 | |
| Glycine | 0.057-0.060 | 1.7 | |
| Glutamic acid | 0.180-0.182 | 1.3 | |
| Proline | 0.048-0.050 | 1.1 | |
| Serine | 0.038-0.040 | 0 | |
| Tyrosine | 0.030-0.032 | 1 | |
| Cystine | 0.016-0.020 | 1 | |
FATS AND FATTY ACIDS
| Name | Content, mass fraction per 100 g of product | % of daily allowance | |
| in numbers | Visually | ||
| Total fat content | 0.15 | 0.2 | |
| Unsaturated fatty acid content | 0.09 | 0.2 | |
| Omega-3 unsaturated fatty acid content | 0.060 g | 6 | |
| Omega-6 unsaturated fatty acid content | 0.02 | 0.2 | |
| Saturated fatty acid content | 0.018-0.022 g | 0.1 | |
Unsaturated fatty acids
| Acid name | Content, g per 100 g of product |
| Palmitoleic C 16:1 (omega-7) | 0 |
| Oleic C 18:1 (omega-9) | 0.0 |
| Linoleic C 18:2 (omega-6) | 0.0 |
| Linolenic C 18:3 (omega-3) | 0.06 |
| Stearidonic C 18:4 (omega-3) | 0 |
| Gadoleic C 20:1 (omega-11) | 0 |
| Arachidic C 20:4 (omega-6) | 0 |
| Eicosapentaenoic C 20:5 (omega-3) | 0 |
| Erucic acid C 22:1 (omega-9) | 0 |
| Clupanoid C 22:5 (omega-3) | 0 |
| Docosahexaenoic C 22:6 (omega-3) | 0 |
| Nervonova C 24:1 (omega-9) | 0 |
Saturated fatty acids
| Acid name | Content, g per 100 g of product |
| Capric C 10:0 | 0 |
| Lauric C 12:0 | 0 |
| Myristic acid C 14:0 | 0 |
| Palmitic acid C 16:0 | 0.018-0.020 g |
| Stearic acid C 18:0 | 0.000-0.002 g |
| Arachidic C 20:0 | 0 |
| Behenic C 22:0 | 0 |
| Lignoceric C 24:0 | 0 |
Sterols
| Name | Content, mass fraction per 100 g of product | % of daily allowance | |
| in numbers | Visually | ||
| Total phytosterols | 38.0 mg | 69.1 |  |
| Campesterol | 1.5 mg | 2.7 | |
| Beta-sitosterol | 22.8 | 57 | |
| Stigmasterol | 0.6 | 1.7 | |
| Cholesterol | 0 | 0 | – |
CARBOHYDRATES
| Name | Content, mass fraction per 100 g of product | % of daily requirement | |
| in numbers | Visually | ||
| Total carbohydrate content | 2.87 | 0.8 | |
| Mono- and disaccharides | 1.6-2.4 g | 4.0 | |
| Glucose | 0.36 | 3.6 | |
| Fructose | 0.4 | 1.2 | |
| Galactose | 0 | 0.0 | |
| Sucrose | 0 | – | – |
| Lactose | 0 | 0 | |
| Starch | 0.4 | – | – |
| Maltose | 0 | – | – |
| Fiber | 1.2-1.3 g | 5 | |
| Pectin | 0.4 | 8.0 | |
PURINE BASES
| Name | Content, mass fraction per 100 g of product | % of daily requirement | |
| in numbers | Visually | ||
| Purine content | 13.0 | 10.0 | |
OXALIC ACID
| Name | Content, mass fraction per 100 g of product | % of maximum daily intake | |
| in numbers | Visually | ||
| Oxalic acid content | 3.0 | 0.8 | |