Including cold water oily fish such as salmon herring mackerel anchovies sardines and other foods that are rich in omega 3 fatty acids may keep your joints healthy even if you are overweight a study suggests. 'Our results suggest that dietary factors play a more significant role than mechanical factors in the link between obesity and osteoarthritis' said Farshid Guilak a professor at the Duke University in the US. Mice consuming a supplement of omega 3 fatty acids had healthier joints than those fed diets high in saturated fats and omega 6 fatty acids the findings showed indicating unhealthy dietary