Chicken in vegetable oil or olive this bad?

i'm new cook - anyway i like puttin pieces of chicken, pork chop, etc. in a skilet on stovetop then puttin olive oil or veget. oil in the pan and eating the food when done. i put some onions n' celery n garlic in there too. anyway is this BAD for my health?
Update: * i forget to add that i flour n' breadcrumbs sometimes on the meat THEN put it in skillet.
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