1、 Is it photosensitive food

Lettuce, also known as lettuce, is a photosensitive food, that is, it is rich in vitamins and photosensitive substances. Generally, after eating too much, it may have skin problems if it is exposed to sunlight or computer light radiation

2、 How to clean

1. Wash with clean water: before cleaning, peel off the rotten leaves on the outer layer, and then put them in the cleaning. First wash the roots, which is the easiest place to accumulate soil. After that, it is to wash along the leaf texture to remove the dust and impurities on it. After cleaning, rinse it with water once or twice, and finally you can eat it

2. Brine washing: first prepare a basin of water, add a small amount of salt into it, then stir evenly, put the lettuce in, and soak it for about 20 minutes. After soaking, rinse it with clean water twice, so that the pesticide and dust on it can be washed away

3、 Selection method

Lettuce has loose leaves and crusted lettuce. Generally speaking, loose leaves can be fried or used as a base for dishes. If the lettuce is pelleted, it contains more water and is very suitable for eating raw. The leaves of lettuce should be thicker, and the stem should be white and very fresh. If there are wilting leaves, dry leaves or pests on them, try not to choose them. Also, you can smell it when you buy it. Some will have a strong smell of pesticides. Don't buy this kind of