The Mediterranean diet is loaded with fruits, veggies, whole grains, healthy fats, beans, and fish. These foods have natural chemicals that help keep your inflammation in check.
Veggies, beans, and whole grains are also healthy because they're high in fiber. Fish is a good source of omega-3 fatty acids, which are healthy fats. Fatty fish, like salmon, herring, sardines, and anchovies, have the most.
A Mediterranean diet also relies on olive oil, another healthy fat, to take the place of full-fat dairy products like butter. That's good if you have rheumatoid arthritis, because olive oil can also lower levels of the chemicals that cause inflammation.