1 Lettuce red can still eat

Lettuce ball root red is the result of oxidation, chlorophyll is oxidized. It is non-toxic and can be eaten, however, the flavor texture and nutritional value will deteriorate.

Lettuce broken place for a long time oxidation discoloration pinch off the discoloration part of the water wash can eat.

2 Why lettuce will be red

If you find that the lettuce ball bought back the root or the edge of the leaf becomes red, it means that the iron in the lettuce is oxidized, indicating that it is not fresh.

Chlorophyll is easily degraded, and when it is degraded, lutein, carotenoids, carotenoids, etc. become relatively more abundant. Lettuce will "turn" red after being placed for a long time.

3 Lettuce how to save will not be red

Lettuce do not put directly into the refrigerator, you should first let the surface of the lettuce droplets air dry, and then clean paper towels will lettuce wrapped in a bag into the refrigerator to save.

Or a layer of paper towels in the refrigerator crisper to absorb moisture and prolong the freshness of fruits and vegetables. It's worth noting that lettuce is very sensitive to ethylene, so avoid storing it with fruits like bananas and ripe apples to avoid inducing russet spots.

4 How to choose lettuce According to the state of growth of the leaves

According to the state of growth of the leaves, there are two kinds of loose leaf lettuce and ball lettuce, in general, ball lettuce is light green, water, more suitable for raw food, while loose leaf lettuce is generally used as a bottom of the dish, accompanied by a plate or fried food.

Look at the appearance

Quality lettuce should be leafy, green, white, tender, no wilted leaves, dry leaves, no insect pests, no disease spots, moderate size.

Smell

Lettuce may have pesticide and fertilizer residues, and should be smelled when selected to avoid such chemicals.