German and Swiss experts have reached an interesting conclusion after research: the color of tableware can directly affect appetite, and red tableware can reduce people's appetite by 40%. In people's traditional concepts, red is a very aggressive color. Serving food often makes it difficult to swallow, because subconsciously people will send themselves a psychological hint that they can't eat the food in red tableware, which reduces appetite. If the following are true, the above questions can be questioned most:. ['Fast food giants often use large, bright red patterns in the lobby, which have not affected fast-food sales.', 'Red easily makes people feel nervous, overeating is a way for people to relax when they are nervous.', 'Tests show that people who drink red cups drink 44% less water on average than those who use blue cups.', 'Red heralds restlessness and worry, and people seeing red utensils instinctively worry about food being dangerous.']