Harmful.
1, lettuce cold, stomach cold people should try to eat less, so as not to aggravate the condition.
2, lettuce may also become an allergen for some allergists, so people who are allergic to lettuce can not eat lettuce, so as to avoid allergic symptoms such as skin redness, swelling, headache and asthma.
3, lettuce is more sensitive to ethylene, easy to induce brown spots, so storage of lettuce should avoid apples or bananas and other foods that emit ethylene.
4, lettuce is prone to pesticide or fertilizer residues, if it is eaten raw, be sure to wash it. Rice water alkaloids can effectively dissolve pesticide and fertilizer residues on the lettuce, so you can first soak the lettuce with rice water for ten minutes, and then change the flow of water to rinse the lettuce can be.
5, lettuce contains more nitrates, cooked lettuce stored for a small period of time is easy to mold and bacteria under the action of nitrites and health hazards, so lettuce is best fried now eat do not leave.
Expanded information:
Lettuce has a high nutritive value, and every 100 grams of lettuce contains 13 calories, 2 grams of carbohydrates, 1.3 grams of protein, 0.7 grams of dietary fiber, 0.3 grams of fat, 170 milligrams of potassium, 34 milligrams of calcium, 32.8 milligrams of sodium, 27 milligrams of phosphorus, 18 milligrams of magnesium, 13 milligrams of vitamin C, 1.02 milligrams of vitamin E, 0.9 milligrams of iron, 0.4 milligrams of niacin, 0.27 milligrams of zinc, 0.13 milligrams of manganese, and 1.15 micrograms of selenium.
Lettuce is rich in carbohydrates, dietary fiber, vitamins and minerals and other nutrients, with high nutritional value. At the same time, lettuce also contains interferon inducer, mannitol and lettuce lettuce, etc., regular consumption can be antiviral, diuretic and soothing mood. However, in the consumption of lettuce to pay attention to some matters, so as not to eat improper health effects.
People's Daily Online - What are the nutritional benefits of lettuce? What to pay attention to when eating lettuce?