>>1412176About 75%-80% of people who change their diet radically get gastrointestinal problems. Even farmers need to watch out for it and takes steps against it when feeding their farm animals new diets or adding something new to their animals' diet. You can accidentally kill an animal by switching their diet incorrectly.
It is worse in a survival situation where you need every calorie and bit of energy to maintain your survival. Any bit of that taken away needlessly can get you and others with you killed. The key term here is, "survival situation." That can be anything from a 2-hour stranding on a nice tropical island or 4 days stuck in cold water up to your waist under 10 tons of broken building.
Not knowing this stuff intimately just means you are either ignorant of it and need to learn it or you are LARPing and need to get a better hobby.
