1. Fresh corn cooked in an ordinary pot will be cooked in 15 minutes after boiling. This kind of corn has a fragrant and sweet taste. Old corn needs to be cooked for a longer time because it is not easy to ripen, so it needs to be steamed for a long time. , so that the mellow flavor of old corn will come out.

2. From the perspective of anti-free radicals, research by Cornell University in the "Journal of Agricultural and Food Chemistry" shows that after heating corn at 115 degrees Celsius for 10 minutes, 25 minutes and 50 minutes respectively, It was found that its anti-free radical activity increased by 22, 44 and 53 points. In other words, the longer the corn is heated, the better the anti-aging effect. Therefore, it is best for the elderly to cook corn for a longer period of time when cooking corn at home.