Dementia risk could increase with low levels of essential vitamin

Fox News contributor Dr. Marc Siegel joins'Fox News Live' to discuss the FDA approving a new Alzheimer treatment drug and the FDA banning bromide vegetable oils. "Normal" levels of vitamin B12 may not be enough to ward off dementia, new research finds. Researchers at University of California San Francisco studied 231 healthy older adults (averaging 71 years of age) who did not have dementia or mild cognitive impairment. Blood tests showed that their B12 levels averaged 414.8 pmol/L, while the recommended minimum level in the U.S. is just 148 pmol/L. Participants who had lower B12 levels were found to have "slower cognitive and visual processing speeds" when taking tests, which is linked to "subtle cognitive decline," according to a UCSF press release.