A prepper friend told me that she has 500 lbs of rice, wheat and beans stored. I asked her what else she had and she listed canned goods. So, I asked what about spices and seasonings? She replied that in a survival situation it would be a waste of resources to have them. She is making a common prepper mistake. Relying on just a few food source items can cause malnutrition. This is generally called "Rabbit Starvation" among preppers and survivalists.
Spices and seasonings should be considered staples. They prevent food fatigue. They not only make the food more palatable and interesting, but they also make the food more nutritious. Parsley, for example, serves as a breath freshener, aids in digestion, and is an anti-oxidant. Three and a half ounces of parsley provides 50% of the USRDA of Vitamin A. It is also high in Vitamin C and minerals.
Honey is another item that every prepper should have. It boosts energy and is easily absorbed by the body. It has antimicrobial properties that can be used as a natural cure. (Warning: honey should not be fed to infants.) Vinegar, like honey, has qualities that make it a natural medicine. Studies indicate that daily intake of vinegar improves inflammation and fights disease. The value of having salt can not be understated. A general rule of thumb is to have 25# of salt per person per year for cooking and seasoning.
Don't overlook the obvious--your yard-- to improve the nutritional value of your preparedness food. Dandelion greens are high in Vitamins A, C, and K. Tea made from pine needles is a great source of vitamin C. Prickly pear leaves (nopalitos) are a good source of B vitamins, iron and copper. Educate yourself on natural food sources.
Preppers should not consider their food storage complete without the following:
cream of tartar
apple cider vinegar
This list is not exhaustive and is only meant to get you started on thinking about what you need as far as nutritional resources. Every prepper has different needs. Pregnant women need folic acid. Children need different amounts of trace minerals than adults. Preppers need to research and add accordingly to their food storage. Don't let poor nutrition deplete your immune system and make you more vulnerable in an already stressful situation.