As the saying goes, people in different places have different eating habits, such as sushi. As we all know, this is the Japanese favorite, but Europeans and Americans may "catch a cold" about it. All along, we think this is just a taste preference, but the latest research by scientists has found that a certain group of people may only get energy from a certain diet. In other words, only Japanese people can digest seaweed wrapped in sushi and get energy, while North Americans don't have this ability.