Ideally, a human should eat from each of the six food groups. No doubt it is harder to do so under the severe circumstances, but it is possible.
- Rice, Pasta, Cereal, Bread Group: Bread and cereal are by far some of the easiest products to have stocked up in the pantry. Just remember the amount carbohydrates and sugar that come along with such products. Bread that contains wheat is more nutritious than average white bread. Cook rice and pastas ahead of time, before the power goes out, and store in air tight containers. These precooked products will stay fresh for up to 3 days.
- Fruit Group: Bananas, apples, grapes, oranges, etc. should all eaten before they rot. Many fruits can be found in cans such as pineapples, tangerines, and fruit salads. You just have to remember that you will be eating them at room temperature.
- Meat, Poultry, Fish, Beans, Nuts Group: Canned beans and nuts are the best bet with this group. Canned tuna is always a good source of fish, just don't overdo it.
- Fats, Oils, Sweets Group: This is, by far, one of the easiest groups to accomplish while eating during a day. Fats, oils, and sugars are found literally every food. Do not worry about this group.
- Milk, Yogurt, Cheese Group: You will have to improvise, if trying to complete this daily food group. Most vitamin C products, unfortunately, require refrigeration. Protein shakes are the best way to satisfy this group. There are now numerous brands on store shelves and surely one that satisfies your taste buds.
- Vegetable Group: Some vegetables, such as carrots and beans, maybe o.k. to eat after a limited time of non-refrigeration. Drinks like V8 satisfy the majority of required vegetables during the day. Your best bet with this category is to resort to cans.