Lettuce leaves are non-toxic.

Lettuce, also known as rhizome lettuce, lettuce hibiscus, lettuce tobacco, lettuce, green cabbage, etc., is a famous leafy vegetable belonging to the family of Asteraceae. Originally from the Mediterranean coastal area, lettuce is now widely grown all over the world and is one of the important vegetables. Lettuce is an annual herb with an erect stem, up to about 1 meter in height, and long or ovate leaves with toothed edges. The flowers of lettuce are small and yellow, gathered into small clusters, and bloom in the summer.

The root system of lettuce is developed to a depth of up to 50 centimeters, which can absorb a large amount of nutrients and water, so it is relatively drought-resistant and highly adaptable. Lettuce is rich in nutrients, containing a variety of vitamins, minerals and dietary fiber. Among them, lettuce leaves have a high content of vitamin C. The content of vitamin C per 100 grams of lettuce leaves is about 30 milligrams, which is higher than that of apples of the same weight.

Purchasing lettuce notes

1, appearance: you should choose lettuce whose skin color is bright green, shiny, and free of blemishes and damage. If the skin is yellow, wilted or spotted, it means the lettuce has aged or rotted, so don't buy it.

2. Touch: The lettuce should be elastic when you touch it, and should not feel soft or hard; lettuce that is soft to the touch may be due to over-ripening or damage.

3, taste: lettuce flavor should be fragrant, sweet and crisp, if there is a strange smell or bitter taste, that lettuce may be over-fertilized or overgrown, do not buy.

4, size: lettuce size moderate, do not choose too small or too big lettuce, too small lettuce may affect the taste, and too big lettuce is not easy to cook through.