Eating fish may reduce arthritis symptoms. A study of 176 participants had found that eating fish may cut down in rheumatoid arthritis symptoms such as painful joint inflammation. Researchers divided members into two groups based on their diets: ranging from those who eat fish less than once a month, and those who eat fish more than twice a week. After factoring in lifestyle habits, fish oil supplement consumption, sex, BMI, and race, they discovered that the disease symptoms lessened in those who ate fish most frequently. As it turns out certain types of fish can actually benefit your mental and physical health in more ways than one.