Researchers do not recommend it, but they say it probably would not kill you to drink up to 25 cups of coffee a day.
According to a recent study, there is a correlation between coffee and the activation of fatliquors in your body.
Michael Symonds, professor at the University of Nottingham and co-director of the study, found this coffee can stimulate what is known as brown fat. "Brown fat is a unique organ used to generate heat and is present in relatively small amounts in the body," he told USA TODAY.
Brown adipose cells are the body's fatliquors, the University of Nottingham said in a press release. When the body produces heat, it consumes energy and burns calories. This is the first study to show that a cup of coffee can affect the function of brown fat, according to Symonds in the press release.
Brown fat or brown fat affects how fast the body burns calories. In the past, it was assumed that this type of tissue occurs only in mammals and infants in hibernation, the university said.
However, it has also been found in adult humans. According to the university, people with a lower body mass index have more brown fat than people with a higher body mass index. The study was published in Scientific Reports.
Adults have between 50 and 100 grams of brown fat in their bodies, said Symonds USA TODAY, and when activated, it can generate 300 times more heat than any other organ in the body.
At maximum activation, it may potentially produce up to 10% of daily body heat.
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Researchers began the study using stem cells from both mice and humans to test the brown fat activity. They then tested human volunteers by looking at the brown fat activity in the neck within an hour of drinking a coffee.
According to Symonds, the coffee was a portion of Nescafe Original with about 65 mg of caffeine.
The consumption of coffee increased the activity of brown fat in humans, researchers found. And the control, caffeine dissolved in water, did not affect the brown fat activity.
Symonds told TODAY that coffee helps with diabetes in addition to obesity, as it not only increases the ability of brown fat, but also improves blood sugar levels.
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The next step of the researcher will be to consider whether caffeine itself can activate brown fat, said Symonds.
"There was only an increase in activity (from brown fat) from this study," Symonds said twice a day for a two-week period, an increase in brown fat itself and an increase in activity.
Follow Morgan Hines on Twitter: @MorganEmHines .
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