Low cholesterol means that the cholesterol level in the body is lower than the normal range. Low cholesterol is generally not very harmful to the body because it can be caused by a recent poor diet. Although elevated cholesterol is bad, lower cholesterol is also bad for the body. Cholesterol is a source of energy for the body, and when cholesterol is lowered, the patient will suffer from malnutrition, especially in the nervous system of the brain, which needs cholesterol to function properly, and if cholesterol is lowered too significantly, it will easily cause amnesia or other neurological symptoms. Low cholesterol can be caused by a recent poor diet, but it can also be caused by an overdose of lipid-lowering drugs, such as statins, which can cause cholesterol to drop. If cholesterol is found to be significantly lower than normal at this point, then statins and other lipid-lowering medications should be suspended for now.