(ELI5)How do animals that have strict diets of certain foods not end up with certain vitamin deficiencies like humans develop ?

Question

Humans have to maintain well balanced diets or they can develop vitamin deficiencies of certain vitamins and minerals, why does this not seem to be true for animals ?

In: Biology

Answer 1

Humans (and guinea pigs) have a genetic mutation where we can’t produce vitamin C… so we must get it from our diet. Most other animals can produce it on their own.