An item that is often overlooked in long-term prepping is supplements like multivitamins. For short-term emergencies, such as a blizzard trapping you at home for a few days, proper nutrition is generally not a huge concern. In fact, I often suggest that having comfort food like chips and other junk can help keep family members from going crazy. Forgetting the diet for a couple days can make a stressful situation a little easier to handle.
But when we look at long-term situations, such as epidemics or major natural disasters that result in substantial YO-YO time, we need to plan ahead for nutritional needs. This is particularly important to prevent illnesses like scurvy, which is indeed a real thing and not just something pirates talk about in the movies. Scurvy results from a deficiency in vitamin C and symptoms include lethargy, depression, spongy gums, and even bleeding from mucous membranes. The reason it became so associated with pirates is during long voyages at sea back in those days, sources of vitamin C were few.
I would encourage you to shop around and stock up on vitamins and supplements to help offset any nutritional deficiencies during long-term disasters. Depending on the nature of the emergency, you may not have unlimited resources for food. While it is important to keep bellies full of calories, you’ll need proper nutrition to keep your body running.