A pathologist at the Claire Squires inquest has told the coroner she died from acute heart failure complicated by the presence of the performance enhancing supplement DMAA.
The coroner at Southwark has also been told that DMAA is now a banned drug in this country since August 2012 .
Claire died in April 2012 just a mile from the finishing line of the London marathon.
More top news
Some heavy and perhaps thundery showers in places. Feeling warm and humid.
It will be generally cloudy, although some bright or sunny intervals may occur, along with a showers or longer spells of rain.
A teenager has spoken for the first time since he witnessed the death of his brother, uncle and grandfather in the Tunisian terror attack.