In one study from the University of Washington in Seattle
, people with rheumatoid arthritis supplemented with Zinc three times a day. After three months, significant improvements in morning stiffness, inflammation and swelling were reported. If you do not eat ample amounts of nuts, seeds and oats, you are probably not getting enough Zinc. Under stressful conditions or if you have an inflammatory disease, you need more in any case, probably around 20-25 mg per day.