Why do people who are very thin, and some people who are obese, suffer from deﬁciency diseases?
People who are very thin do not take in enough food to get all the nutrients (vitamins, minerals, etc.) they need. Some people who are obese eat a lot of junk/fast food which is very low in minerals and vitamins, high in salt, fat, etc. So both can suffer from deﬁ ciency diseases