Dehydrated food is a method of preservation that removes water from food, which greatly extends its shelf life. This greatly reduces the activity of microorganisms and enzymes that cause food to spoil and decompose. Dehydrated foods are lightweight and compact and ideal for space-saving situations such as hiking expeditions, mountaineering expeditions, etc. Dehydrated foods can be easily rehydrated by adding water, which restores their original consistency and some of their taste.