A neurologist who was diagnosed with dementia after doing a simple DNA test has revealed his first warning sign – and it appeared almost two decades ago. Daniel Gibbs Gibbs, 73, has been living with Alzheimer’s disease for the past eight years. In 2012, he took a DNA test to inform his wife’s genealogy research. The results would be life-changing. Besides learning where his ancestors had lived and whether his face is likely to flush after drinking alcohol, Gibbs discovered he had two copies of the apolipoprotein E (APOE) ε4 allele. As a practicing neurologist, he knew that inheriting two copie…
