Cannot. Sprouting potatoes or turn green in the green skin, unripe green tomatoes (except green tomatoes), contain the alkaloids of lobelia, can not be eaten. Lobelia alkaloids, also known as lycopene, lobelia toxin, potato toxin, is composed of glucose residues and lycopene, a weak alkaline glycoside. Insoluble in water, ether, chloroform, soluble in ethanol, and dilute acid **** heat generation of eggplant and some sugars.

The method of selecting tomatoes:

First: look at the shape

Observe the head of the tomato when you buy it, if the top is very round and full, that means it is a good tomato, such tomatoes, sweet and juicy flavor. If the head is pointed, or even deformed shape, then such tomatoes are generally very little juice, or even inside the hollow.

Second: look at the color

Buy tomatoes, do not "judge by appearances", every time to pick the red, this is not the best, if the whole body is red, it is very likely to be after ripening tomatoes. When you buy, it is best to choose pink tomatoes, so that it is easy to save, and the maturity is also very high.

The above references? People's Daily Online - Bitter as yellow squash, gourd, cucumber don't be heartbroken! Throw them away!