How to choose lettuce? Is there a hole in the middle of lettuce to eat?

Lettuce, also known as lettuce, is a very common food with high nutritional value and is suitable for all kinds of people. Lettuce tastes fresh and tender. How to choose when buying? Remember that the lettuce bought at these points is tender, smooth and delicious.

How to choose lettuce?

The weight of 1 is equally thick. Generally, the heavy ones will not be hollow. At the same time, it depends on the leaf label density of lettuce epidermis, which is better and has higher nutritional value. ?

2 Pinch the skin of lettuce is hard. You can pick it up and pinch it with your nails when you buy it. If it is hard, it is easy to be hollow. The skin is easy to pinch and the sound is crisp. In addition, it should be lettuce with a certain hardness. There is a lot of fresh water, which feels a little soft, indicating that it has been left for too long. ?

3 Look at the cross section. There are two kinds of lettuce, one is very thick and the other is very thin, which can be seen through the cross section. Generally speaking, the skin is thin and looks very clear between the skin and the meat. This kind of lettuce tastes crisp when it is fresh, and the skin doesn't take up much weight. ?

4 Look at the leaves If the leaves on the lettuce are oily green, not burnt, not bolting, and the leaves are spotted and rotten, it means that the lettuce is better and there will be no holes.

Is there a hole in the middle of lettuce to eat?

Can eat. Lettuce with a hole in the middle is generally edible, which is caused by the poor growth of lettuce itself. Eating it is harmless to health, but the taste will get worse. ?

The reason for the long hole:

1, lettuce lacks fertilizer during the growth period, which will lead to hollowing. ?

2. The roots of lettuce are in a period of rapid growth, and when it encounters cold air, lettuce will also appear hollow. ?

3. Lettuce has entered the picking period. If it is not collected in time, it will become empty due to aging.

The lettuce is black in the middle. Can I eat?

Not edible. There is a black heart in the middle of lettuce, which is usually caused by the invasion of bacteria or germs. The whole flesh of lettuce contains germs, which has a certain impact on human health and cannot be eaten. ?

Lettuce turns red in the middle. Can I eat?

Can eat. Lettuce is red in the middle, also called heartburn lettuce, because the weather is dry or the harvest is too late. Such lettuce is often accompanied by hollowness. Although edible, the red part tastes bad and needs to be removed before eating.