Taylor Hooton Foundation > Hoot’s Corner > General > Man dies after drinking pre-workout containing up to 200 TIMES more caffeine than a normal cup of coffee
April 7, 2021
Man dies after drinking pre-workout containing up to 200 TIMES more caffeine than a normal cup of coffee

Personal trainer, 29, died shortly after drinking pre-workout shake containing up to 200 TIMES more caffeine than a normal cup of coffee, inquest hears

  • Thomas Mansfield, 29, fell ill after taking the drink mixed with caffeine solution 
  • May have taken five times the potentially fatal level of stimulant caffeine powder
  • Mr Mansfield complained his heart was ‘racing’ before he collapsed at his home 

A personal trainer died shortly after ingesting a pre-workout drink mixed with caffeine, an inquest heard today.  

Father-of-two Thomas Mansfield measured out the powder and mixed it with a drink at his home in Colwyn Bay, Wales, but quickly felt unwell and complained of a racing heart. 

The 29-year-old collapsed in front of his wife Suzy, and was rushed to Glan Clwyd Hospital, Bodelwyddan, but died in the emergency department.  

The inquest was told Mr Mansfield may have taken five times the potentially fatal level of caffeine. Post-mortem results gave Mr Mansfield’s provisional cause of death as caffeine toxicity.

The coroner said a ‘substantial investigation’ would be held into the circumstances surrounding Mr Mansfield’s death. Father-of-two Thomas Mansfield fell ill after mixing a caffeine powder with a drink+5

Father-of-two Thomas Mansfield fell ill after mixing a caffeine powder with a drink Mr Mansfield, a 29-year-old personal trainer who ran his own business, collapsed and was rushed to Glan Clwyd Hospital, Bodelwyddan, but died in the emergency department+5

Mr Mansfield, a 29-year-old personal trainer who ran his own business, collapsed and was rushed to Glan Clwyd Hospital, Bodelwyddan, but died in the emergency department

An inquest into his death was formally opened at Ruthin County Hall today. 

Toxicology tests showed Mr Mansfield had a level of 392 milligrammes of caffeine per litre of blood. 

The coroner said a deaths had been recorded at 78 milligrammes per litre. 

A single cup of coffee would typically only bring the level of caffeine in the blood to a single digit figure per litre – around 2 to 6, depending on the strength. 

It remains unclear what the mixture was or how much Mr Mansfield used. 

Many brands of pre-workout range from 150mg to 300mg of caffeine per serving, and a teaspoon of pure caffeine powder contains an incredible 3,200mg. 

The precise mixture Mr Mansfield took is not yet known.  

The couple would have celebrated their second wedding anniversary earlier in March. They have two children together, and well-wishers rallied round to fundraise for the family following the personal trainer’s death.

Writing on social media, Mrs Mansfield said she was ‘absolutely heartbroken’ by the tragedy.

She said: ‘My world has been ripped apart and my kids have lost their daddy.

‘I’ve lost the love of my life. Tom passed away at the hospital, the family tried so hard but it wasn’t enough. He was my whole life I’ll never get over this.

‘You were my life Tom. I’m missing you so much and trying so hard for the kids keep it together, I love you more than I could love anyone, I’ll always love you.’Thomas Mansfield and his wife Suzy. The couple would have celebrated their second wedding anniversary earlier in March+5

Thomas Mansfield and his wife Suzy. The couple would have celebrated their second wedding anniversary earlier in March