Some people trying to eat healthy increase their consumption of salmon, tuna or mackerel — foods rich in omega-3 polyunsaturated fats (n-3 PUFA). People also take fish oil supplements that boost intake of vitamin D for healthy bones and muscle, and to regulate the release of serotonin, which affects appetite and stress. And why not? read more Townsend finds mice fed foods rich in omega-3 polyunsaturated fats sustain tissue damage