Can only enjoy three cups of coffee a day.

Experts argue about whether drinking coffee is good for health or not. New Canadian research shows that some people have a special gene in their bodies. If they drink too much coffee, they will increase their risk of heart disease by 60%. On the contrary, people with another type of gene who drink more coffee can boost their metabolism. It's hard to know our genetic makeup, so even if you like coffee, don't drink more than three cups a day, experts say.

Almed El-Sohemy, a researcher at the University of Toronto, published a research report in the American Medical Journal. The researchers studied more than 4000 Costa Ricans for 10 years (1994-2004) in an attempt to unravel the mystery of the effects of coffee on the body.

There have been many studies on caffeine in the past, many of which are contradictory. Some say coffee accelerates heart attacks, while others say it's good for your health. Drinking two cups of coffee a day increases the risk of heart disease if there is a gene called 1F in the body, a new study has found. People under the age of 50 who drink a lot of coffee have a four-fold higher risk of developing the disease than those who drink one cup a day. People with 1F gene and those who drank three or four cups a day had a 36% and 64% higher risk of heart disease.

The study also found that if there is a gene called 1A in your body, drinking coffee will do a lot of good. Drinking two or three cups a day can reduce the risk of heart disease by 40%.

Unfortunately, it is difficult to know the genetic structure of our body, so experts advise: no matter what your genetic structure is, drinking a cup of coffee a day will never do any harm to your body!