Nói cho người phục vụ biết rằng bạn không muốn ăn món có chứa bột ngọt. Không ăn một số món khi đi ăn ở ngoài. Cân nhắc kỹ trước khi ăn đồ ăn nhanh.

Given the above summary, write a detailed text in English for it.
These days, many restaurants have moved away from using MSG in their cooking. It is still a good idea to ask and to be adamant that MSG is not used in the food prepared for you. If you want to eat out but avoid MSG, known which foods to avoid. Common foods that contain MSG include vegetable broths, breads, dressings, soy products, sweeteners, and flavors. Most fast food restaurants, such as McDonalds, Burger King, KFC, Pizza Hut, and Chick-fil-A all put MSG in their food. If you are curious about which particular items have MSG, then go to the restaurant's website and look at the ingredients list.