Genetic factors (APOE ε4)

The APOE ε4 gene variant is a biological factor linked to an increased risk of developing Alzheimer's disease. Everyone inherits genes from their parents, and APOE is one such gene involved in brain health. The ε4 version of this gene can influence how the brain accumulates certain proteins associated with Alzheimer's. Having this gene doesn't mean you will definitely develop the disease, but it raises your risk compared to those without it. It's just one of many factors—genetics, lifestyle, and environment—that can influence brain health over time.