If you have a family history of memory-related problems and are comfortable with genetic testing, you can have your level of Apo E4 protein checked. That will help you determine whether you're more or less predisposed to clearing that gunky beta-amyloid from your neural wiring. You can find out more about the test on www.aruplab.com, www.athenadiagnostics.com or www.realage.com. No matter what your result, know that obesity and alcohol increase expression of the gene, while exercise decreases the amount of Apo E4 in the blood.