There are many different types of food. Fresh food is a product that has been subjected to any form of heat or chemical processing. Frozen food has been subjected to rapid freezing and is kept frozen until used. Also, foods that are quickly frozen while still fresh can be called frozen fresh or fresh frozen. Canned or pasteurized food is food products that have been hermetically sealed and processed by heat to prevent spoilage. Dried or dehydrated food is a product that undergoes a drying process, a method of food preservation that works by removing water from the food, which inhibits the growth of bacteria and other microorganisms. Freeze-dried or lyophilized food is made by using a process called lyophilization, in which the temperature of the product is lowered to below freezing, and then a high-pressure vacuum is applied to extract the water in the form of vapor. Although people should eat various types of foods, some foods should be consumed more often than others. It is especially important to eat fresh foods every day, but sometimes its availability is restricted for many reasons. Although fresh food can be replaced by food preserved by the various method mentioned above, it is safe to say that lyophilized food is the best choice when fresh counterparts are not available. Also, lyophilization is one of the best ways to preserve and store foods to have on hand for any circumstance. Freeze-dried food is best for camping, backpacking, food storage, or any emergency circumstance. The best freeze-dried food that should be consumed often includes premade full meals, individual fruits and vegetables, meat, dairy, soup mix, and snacks. If you like to try it, shop with freeze-dried food.