Lettuce in western hamburgers and Korean barbecues are generally bought from special bases. Lettuce grown in this base does not contain or only contains less chemicals such as pesticides, and can be eaten raw safely with the help of insect-proof nets and ultraviolet rays.

If you go to the market to buy lettuce, you'd better roll it in boiling water or fry it before eating. ? The scientific name of lettuce is lettuce, and Guangzhou is one of the earliest areas in China. Lettuce contains lettuce, which has the effect of calming the heart and reducing fire.

Extended data:

Precautions for eating lettuce:

1, lettuce is cold, people with cold stomach should eat as little as possible, so as not to aggravate the condition.

2. Lettuce may also become an allergen of some allergic people, so people who are allergic to lettuce should not eat lettuce to avoid allergic symptoms such as redness, headache and asthma.

3. Lettuce is sensitive to ethylene and easy to induce brown spots, so when storing lettuce, foods that emit ethylene such as apples or bananas should be avoided.

4. Lettuce is easy to remain pesticides or fertilizers. If you eat it raw, you must clean it. Alkaloids in rice washing water can effectively dissolve pesticide and fertilizer residues on lettuce, so you can soak lettuce in rice washing water for ten minutes first, and then rinse lettuce with flowing water.

Try not to cut the lettuce with a knife after washing, and tear it into pieces by hand, which will make it more brittle.

6. In order not to destroy the nutrition of lettuce and maintain the crisp and refreshing feeling of lettuce, the cooking time of lettuce should not be too long.

7. Lettuce contains more nitrate. Cooked lettuce, after being stored for a short time, is easily converted into nitrite under the action of mold and bacteria, which is harmful to health. Therefore, it is best to fry lettuce and eat it now.

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