We now know that there is a gene that contributed to Alzheimer Disease. It is called ApoE4 and is found roughly in 15% of the population. Although males carrying the gene are only slightly more likely to get the disease, women had a 180% increase in the incidence of those carrying the gene. The gender specific nature has not been explained. Why am I writing this for a Hair Loss Blog is because we all have parents and you might find that this information becomes valuable if your parents are over 60 year old.