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... But there's no way to tell for sure who will develop the disease.

Some people don't appear to be affected by plaques and tangles—their presence is revealed only after an autopsy, says Dubal. And not everyone with APOE4 gets Alzheimer's (the gene is found in roughly 20 to 25 percent of people; having one copy can increase the risk of getting the disease by two to three times, while two copies can increase the risk twelvefold). The best advice for all of us is to mind our brain health.
As a reminder, always consult your doctor for medical advice and treatment before starting any program.