28 Jan 2016 Blackmores Institute Omega 3 levels affect b vitamins in slowing brains decline 28 Jan 2016 Share Share on LinkedIn Share on Facebook Share on Twitter Share on Google+ Share on Pinterest News B vitamins are more effective in preventing cognitive decline in people who have higher omega 3 levels, new research shows. While research has already established that B vitamin supplements can help slow mental decline in older people with memory problems, an international team has now found that having higher levels of omega-3 fatty acids in your body could boost the B vitamins' effect. × To continue reading this article, please Log In or Sign Up for access.