Caloric, high-fat foods like fried chicken, French fries, donuts, and deep-fried appetizers should be avoided by anyone who has arthritis. When eaten in excess, these foods can increase body fat, which puts extra stress on the joints and amplifies the risk of wear and tear. Plus, body fat is not an inert substance; it is metabolically active, capable of producing hormones and chemicals that actually increase levels of inflammation. To make matters worse, some restaurants fry their foods in hydrogenated oils, which means you may also be getting a dose of dangerous trans fats. Instead of frying, choose a healthier way to prepare your foods; grilling, steaming, roasting, and baking are all tasty, waistline-friendly methods.