Omega-3 fatty acids guard against advanced prostate cancer, flaxseed slowed tumor cell growth, and vitamin K improved chances of staying cancer-free, in three new studies.
Researchers in a prostate cancer study compared about 470 men with aggressive prostate cancer to 470 healthy men. Some of the men had an inflammatory gene (Cox-2 variant) that raised their chances of getting the disease. Overall, men who consumed the most omega-3s were about one-third as likely to have aggressive prostate cancer as were men who consumed the least. Among those with the Cox-2 gene variant, men who consumed the most omega-3s had less than one-fifth the chance of aggressive prostate cancer compared to men who got the least omega-3s.
Study authors noted, “This is one of the first studies to show protection against advanced prostate cancer and interaction with Cox-2.” They continued, “The Cox-2 increased risk of disease was essentially reversed by increasing omega-3 fatty acid intake by a half a gram per day.”
In a flaxseed study, about 160 men with prostate cancer ate their regular diet or a lowfat diet with or without 30 grams of flaxseed per day for an average of 30 days before surgery to remove the prostate gland. Whether on the low fat or regular fat diet, prostate cancer cells multiplied much more slowly in men who ate flaxseed compared to men who did not.
In a vitamin K study, researchers compared vitamin K in the diets of 250 men with prostate cancer to the diets of about 500 healthy men. Men who got the most vitamin K were about one-third as likely to have prostate cancer as were men who got the least vitamin K. Doctors noted that the chances of the disease decreased as the amount of vitamin K increased.