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.
More top news
A new treatment for arthritis sufferers has been hailed as "magic" by a woman who had a pioneering electronic implant fitted.
Local councils are to get an almost £6 billion fund to fight potholes over the next six years.
The Prime Minister and the Leader of the Opposition praised the courage of Britain's armed forces in a Christmas message to troops.