Q-1 Why are my favourite things to eat and drink bad for my health?Do you find that someone is always telling you about a new study that has found that people who eat(drink) XXX are at much higher risk of developing YYY? And of course these foods are no cabbage and brussels sprouts, but your favourite treats sinful foods. But how do researchers reach these conclusions? Do they do experiments or observational studies? If experiments, how do they conduct them? If observational studies, how do they collect the data? How do you control for other variables? Dietary research is extremely difficult to do well. Can you describe some examples or issues where the observed correlation may not be what you think it is?

PLS HELP FAST!! ILL GIVE THUMBS UP!!