Green tomatoes are immature and contain the toxic substance Solanum nigrum. When eating, there is bitter taste in the mouth, and after eating, there are poisoning symptoms such as nausea, vomiting, dizziness and salivation. Therefore, cyan tomatoes are not suitable for cooking, and eating them raw is more dangerous. The harder tomatoes are, the more phytohormones are used. It's best not to buy it, or don't eat it immediately after buying it. Leave it for two or three days to continue ripening until it naturally softens, because at this time, unhealthy lycopene has also been released.