Most importantly cholesterol is actually an essential fuel for brain cells. The carrier protein LDL has been given the derogatory title of “bad cholesterol” however, in reality LDL is not a cholesterol molecule at all. The role of LDL in the brain is to capture cholesterol from the blood and transport it to the brain cell, where it performs critical functions. What researchers are now finding is that when cholesterol levels are low, the brain simply doesn’t work well. And individuals with low cholesterol are at a much greater risk for dementia and other neurological problems.