Posted February 1, 2013

DMAA Supplement Linked to Runner's Death

The cause of death of London marathon runner Claire Squires has been ruled by the investigating coroner as cardiac failure due to extreme exertion, complicated by DMAA toxicity. Squires ingested one serving of the “workout-boosting” supplement Jacked3d during the April 2012 London marathon, and collapsed near the end of the 26.2 mile course - just four months before Britain’s Food Standards Agency (FSA) officially banned the sale of DMAA products.

DMAA (Dimethylamylamine) is known to narrow blood vessels and arteries, increasing blood pressure and the risk of cardiovascular events such as heart attack and stroke. In the U.S., the FDA prohibited sales of supplements containing the ingredient, including Jacked3d, in April 2012.

According to the BBC, coroner Dr. Philip Barlow stated at the hearing on Squires’ death:

“She had taken a supplement containing DMAA which, on the balance of probabilities, in combination with extreme physical exertion, caused acute cardiac failure, which resulted in her death.

My hope is that the coverage of this case and the events leading up to Claire's death will help publicise [sic] the potentially harmful effects of DMAA during extreme exertion."

In fact, this is not the first death associated with the controversial ingredient. In 2011, weight loss and bodybuilding supplements containing DMAA were linked to the deaths of two U.S. military soldiers.

Although the ingredient is no longer allowed to be sold as a dietary supplement ingredient in the U.S., Canada and Britain, consumers may unknowingly purchase supplements that contain DMAA over the internet. Because DMAA was once thought to be a natural component of geranium oil, it may sometimes be listed on labels as geranium oil or geranium extract. It may also be listed as 1,3-dimethylamylamine, geranamine, methylhexanamine, MHA, or 4-methylhexane-2-amine.

USPLabs, maker of Jacked3d, has reformulated the supplement and removed DMAA as an ingredient. The company also recently settled a U.S. class action lawsuit which contended DMAA was an unsafe and illegal dietary supplement ingredient.

See ConsumerLab.com’s Reviews of Weight Loss Supplements, Muscle Enhancers, and Energy Drinks for tests of related products.

See All DMAA Related Warnings:

"Thermo Stimulating" Supplement Recalled -- Contained DMAA

FDA Says DMAA Can't Be Sold as a Supplement

USPLabs Settles Class Action Lawsuit Over Controversial DMAA Ingredient

Distribution of Weight Loss Product Containing DMAA Should Be Stopped Immediately, Warns FDA

Performance Enhancing Ingredient, DMAA, Not Really from Geraniums, Putting Its Use in Supplements in Doubt

DMAA Supplements Pulled from Military Stores After 2 Deaths

For more information and to read the complete BBC article, use the link below.