Marathon runner 'died of heart failure', says doctor

The doctor who performed the post-mortem on Claire Squires, who died during last year's London Marathon, has told an inquest that she died of heart failure, likely complicated by the supplement DMAA.

The caffeine-like stimulant was in the runner's drink, and has since been banned in the UK.

"DMAA causes increased heart rate. On the balance of probability I think the DMAA was a contributing factor to her death' Dr Van Der Walt said.


Drinks firm defends stimulant

The makers of an energy drink consumed by marathon runner Claire Squires before she died during the London Marathon have defended the use of a now-banned stimulant.