To anyone that can stomach six cups of coffee a day, new research suggests that's not a good idea.
A study by the University of South Australia found drinking more than six cups a day increased the risk of heart disease by 22 percent.
The findings, likely, won't have much of an impact on most of us in the US - the average American drinks 1.6 cups a day (compared to eight in Finland, the coffee capital of the world, according to the International Coffee Organization).
But the research digs into a debate about the threshold before caffeine becomes dangerous, after a spate of deaths linked to extremely high caffeine intake, and research that suggested six cups could be protective for your heart.
The research by the University of South Australia confronts a debate about the threshold before caffeine becomes dangerous after a spate of caffeine-related deaths
The study, based on UK Biobank data of 347,077 participants aged between 37 and 73 years old, was a bid to understand if some of us are more resilient to coffee's effects than others.
The researchers focused on the caffeine-metabolizing gene CYP1A2, which is believed to help better process caffeine.
And they identified which coffee consumption habits increased or lowered the risk of cardiovascular disease.
They found that even those with the CYP1A2 gene, which helped them metabolize coffee four
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