She diagnosed her own mother. Then found out she might be next.

Dr. Gertrude Behan is a retired Australian family medicine physician and Phoenix Community member who shared her APOE4 journey on Phoenix Member Stories. She spent decades treating patients, including many with Alzheimer disease, and formed a firsthand view of how limited current treatments like Aricept are. She diagnosed her own mother with Alzheimer in 2016, then discovered her own APOE4 status two years later during breast cancer screening for BRCA mutations.

Dr. Behan was diagnosed with breast cancer and began genetic screening to look for the BRCA gene. During that process she stumbled onto her APOE4 status. Her initial reaction was validation rather than panic, because her mothers Alzheimer diagnosis made the genetic link feel credible rather than abstract. The fear came later, followed by the realization that intervention research suggested she could potentially gain 6 to 8 more years of healthy brain function if she acted now.

Her current stack is cautious and evidence-driven. She takes activated folate and B12 to address her MTHFR gene variant, which brought her homocysteine down to healthy levels. She supplements vitamin D due to the Australian paradox where sun avoidance leaves many deficient despite a sunny climate. She also takes nicotinamide riboside (NR) for brain energy and skin cancer prevention. She keeps microdose lithium and rapamycin on her radar as future options rather than using them now.

Dr. Behans guiding principle is to start interventions now rather than waiting for a perfect plan or a cure. After reading that certain interventions might buy 6 to 8 additional years of healthy brain function, she increased her exercise, reinforced social connections, and examined her diet without waiting. Her mantra: life is finite, there is no point waiting, do it now. For older APOE4 carriers at the pointy end, she adds: do not let perfect be the enemy of good, just do what you can.

In her Phoenix conversation, Dr. Behan reframed APOE4 not as a defective gene but as the wild variant, calling carriers the tough humans who had to track a mammoth for two weeks running on ketones. The framing captures a popular hypothesis that APOE4 was evolutionarily advantageous for hunter-gatherer lifestyles with high physical activity, fasting, and low modern stressors. Carriers are not broken, they are built for an environment that no longer exists, which is why lifestyle design matters so much.

Gertrude read that certain interventions might buy you 6 to 8 more years of healthy brain function. That's when it clicked. "What am I waiting for? If I'm going to do something, I should do it now." She started exercising more. Connecting with people. Examining her diet. Not waiting for a perfect plan. "Life is finite no matter which way you look at it. No point waiting. Do it now."