I am currently taking a multivitamin that has 164 mg on omega 3 fatty acids i have a family history of prostate cancer and heard there is a link between omega 3 and prostate cancer. should continue taking the vitamin? i dont want to increase my ris?

If you are eating a mixed diet, there is no need for taking extra vitamins. 164 mg of fatty acids is a trivial amount and is not likely to have any effect, positive or negative, on your health. For healthy diet: http://www.choosemyplate.gov/., exercise 30 minutes/day, drink enough water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs.