Movie star Chris Hemsworth revealed that in the course of filming 'Limitless', he was confronted with his biggest fear. The 39 year-old has a genetic predisposition to Alzheimer’s Disease - a debilitating condition that affects an estimated 24 million people worldwide with no known cure. 


Today, lifestyle digital producer Lauren Ironmonger speaks to health editor Kate Aubusson about this Apo-E-4 gene and the implications of genetically screening perfectly healthy people.

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