In today's developing world, allergies make up numerous harmful effects on individuals' physical health. Especially in Europe and the US, food intolerance has become more serious day by day. Some people believe large restaurant brands have to explain the whole ingredients which contain in their food. A different idea suggests that the people who suffer from certain allergens, suppose to investigate what they will be eaten. I think both ideas have some pros and cons. In this essay, I will compare these two considerations and explain my own ideas.