Fast food includes items like burgers, pizza, and fried foods that can be prepared and served quickly. While fast food may be convenient, it can harm health in the long run due to its high fat, salt, and calorie content. A survey in the UK found that many fast food items contain high levels of salt. Increased fast food consumption has led to higher obesity rates worldwide and increased risk of diseases like diabetes and heart disease. The document provides tips for reducing fast food intake and making healthier choices when eating out.