Coffee contains caffeine, which can raise the risk of poisoning, according to a new study from the University of Illinois at Chicago.
In the study, researchers analyzed more than 400 studies that tracked the effects of caffeine consumption.
Researchers found that coffee drinkers have a higher risk of dying from caffeine poisoning than people who do not drink coffee.
The study, which appears in the journal Drug and Alcohol Dependence, examined how caffeine levels in beverages vary from one person to the next.
It found that in studies where people drank a glass of coffee at least twice a week, they had a 25 percent increased risk of death compared to people who drank less than half a glass per week.
The researchers also found that those who drank a lot of coffee were more likely to die of caffeine poisoning.
The studies involved people who had a history of heart disease, cancer, diabetes, and high blood pressure.
A glass of green coffee is about three to four cups, according the U.S. Food and Drug Administration.
People who were older, women, and people who did not smoke were at a higher level of risk.
“If you think of caffeine as a poison, it’s a poison,” said study author Amy Schatz, a research associate in the department of preventive medicine at the University at Albany College of Medicine.
“You’re not going to get it from drinking it, and the person drinking it is not going out to get caffeine.”
The researchers conducted their study with data from the National Institutes of Health, which tracked drinking patterns of nearly 12 million people from 2006 to 2015.
They also looked at a list of factors that could increase the risk.
They included whether people were married, had children, smoked, and were obese.
The findings showed that people who were married had a higher chance of dying than those who weren’t.
The risk also increased if people were more than 50 years old, were white, had a high school diploma or less, and had less than $10,000 in income.
The people who smoked were at higher risk than people with diabetes, who were at greater risk of developing kidney disease.
They were also more likely than the people who weren�t overweight to have been diagnosed with type 2 diabetes.
The more a person smoked, the higher their risk of passing on the disease.
“We found that people with a high smoking history were at even higher risk,” Schatz said.
“It’s not just one risk factor.”
The study found that a person who drank coffee three to five times per week had a 50 percent increased chance of death from caffeine overdose, compared to a person drinking one to two cups a day.
People also had a much higher chance if they smoked more than 20 cigarettes a day, and also had higher chances of death if they were obese and had a blood pressure of 120 to 140.
The amount of caffeine consumed was not related to whether a person had been diagnosed or not.
The authors say that people can safely drink a glass or two of coffee a day without being worried about how much they are drinking.
“Even people who drink very little coffee, they can be very safe,” Schitz said.