I found this very interesting. Mine has always been low. I have an aunt and also an uncle who died from alzheimers. Mmmmmmmmm. Teresa Graedon: The People's Pharmacy Changing ideas on cholesterol February 5, 2007 What is considered low when it comes to total cholesterol? My levels, always low, are now at 120, just like they were in my mid-20s. I am almost 49. The highest it has been is 142. I am very forgetful, especially now with names. I don't sleep well and have never been a great communicator because I have trouble finding the right words. Is this related to my cholesterol? ADVERTISEMENTMany doctors believe that cholesterol can never be too low. New research throws that concept into question. A January study in the Archives of Neurology concluded that "a decline in serum total cholesterol levels may be associated with early stages in the development of dementia." Another study published online in December in the journal Movement Disorders has linked low LDL cholesterol with a higher occurrence of Parkinson's disease. The importance of cholesterol in neurological conditions such as Alzheimer's or Parkinson's disease is controversial. But you might want to discuss your lab results with your doctor in light of the new research.