Is gluten a culprit?  Gluten is a protein found in wheat, rye, barley and other foods. It has been linked with inflammation and intestinal irritation. Evidence regarding its role in RA is sparse. Small studies in 2001 and 2008 found that gluten-free vegan diets may increase levels of inflammation-fighting antibodies. Ask your doctor if a gluten-free diet is a good idea for you.

Skip sugar.  Simple sugars in candy, cookies and white pastas spike blood sugar. The co-author of a 2012 study that named type 2 diabetes as a risk factor for osteoarthritis says that high blood sugar levels may stimulate the production of inflammatory substances that can cause joint damage.

Remember, always eat a balanced diet. Choose healthy complex carbs, like whole grains, fresh fruits and vegetables. Your body digests these items more slowly than sugary carbs, so you have fewer insulin spikes.