You could leave the portion about diabulimia and just say 'The most common among these people is skipping insulin injections known as diabulimia'. It's giving a brief overview of diabulimia without having to get into the more complex things that come along with it.



For example, I once had someone with diabulimia explain they skip their insulin. They went into detail as to how it works but that was not necessary for me to understand what it was.