Raisins were invented (probably by accident) to remain fresh. The fact that they’re dehydrated, along with their sugar content, preserves them without the need for refrigeration.
There aren’t many foods that contain a majority of the macronutrients (carbohydrates, fiber, sugar and fats) and the necessary micronutrients (minerals and vitamins) that are necessary for good nutrition. In a survival situation, good nutrition is essential in order to maintain your health, especially during the stressful situations that you will encounter in an emergency or crisis. Raisins are a survival super food as they contain most all the necessary nutrient contents for good health.
Raisins are also fairly sweet. This is due to a high concentration of fructose (sugar). When stored for a long period of time, the sugars inside the raisins will crystallize. This does not affect their use as the sugar grains can be dissolved by soaking the raisins in warm water or when used in cooking or preparing a dish with raisins as part of the ingredients. They may still be eaten as is but may have a grainy consistency due to the sugar crystals.
A single serving of raisins contains approximately 110 to 130 calories, has a fairly high water content per serving, most all of the essential macro and micro nutrients that are required by the body and only lack significant amounts of vitamin A. They also are low in cholesterol. This makes raisins a true super food. Hikers and backpackers have known this for years. Raisins, a dehydrated form of grapes, are a main ingredient of the trail mix often used when hiking or camping.
An unopened package of raisins will stay fresh for years, if it’s kept in a cool, dry place. Once the package is opened, air, moisture and bacteria can get to the raisins, which can shorten their useful life.
Raisins will freeze very well, because they’re so low in moisture. Frozen raisins ought to last (technically) forever.
So start stocking up on raisins! They are relatively inexpensive and have a shelf-life (if stored properly) similar to honey.