July: This study was the talk of the town this summer, and has led - for the first time ever - to a decrease in fish oil supplements sales. This was a controversial (to say the least) re-look at the Selenium and Vitamin E Cancer Prevention Trial (SELECT). The same researchers who earlier concluded that trans fats were good for prostate cancer prevention now bring you news that fish oil supplements increase risk of prostate cancer by 71 percent.
Red flag #1: Researcher admonishments to stop taking fish oil “in particular through supplementation” come when the 834 study participants never noted how they received their omega-3s – the researchers looked at blood data only, not whether the study participants ingested fish or supplements.
Red flag #2: Population data shows countries with the highest fish consumption, such as Japan, have the lowest incidences of prostate cancer.
Red flag #3: The study was designed to look at two nutrients: selenium and vitamin E.
Red flag #4, 5, 6, 7 ... Check out this detailed critique.