Due to how the body metabolizes two products of frying: Glycated End Products and Saturated Fats – this leads to a lot of radical oxygen species in your body which then target DNA and proteins in ways we don’t want them to. Also, saturated fats accumulate in your body but I don’t remember why, I think it was that it clogs vasculature. ELI5: fats and protein changes during cooking are hard for the body to break down, and in the process releases other molecules that damage cells.
Edits: grammar
Edit2 : clarification in eli5
Latest Answers