the sentence that contains the main idea is that "chocolate has been found to be a cause of weight gain."
the paragraph is pointing out the fact that it has been <em>found </em>to cause weight gain but the paragraph goes on to say that some of the researchers don't dive deep enough.
"Chocolate has been found to be a cause of weight gain" OR! "But chocolate does have some health benefits" <-- this one most likely because the rest is about healthy stuff i dont know lol good luck! <3
