A small glass of juice or soda a day is linked to increased risk of cancer, study finds.

There's more bad news for fans of sugary drinks such as soda and fruit juice.

A new study has linked drinking just a small glass of a sugary drink per day -- 100 ml, about a third of a typical can of soda -- to an 18% increase in overall cancer risk and a 22% increase in risk for breast cancer.
The research, which looked at more than 100,000 French adults, links consumption of sugary drinks to an increased risk of some cancers. This follows a recent study linking sugary beverage consumption to greater risk of premature death.
It's not just soda: Drinking too much fruit juice (or any sugary drink) linked to premature death risk
It's not just soda: Drinking too much fruit juice (or any sugary drink) linked to premature death risk
"The results indicate statistically significant correlations between the consumption of sugar-sweetened drinks and risk of all cancers combined, and of breast cancer," said Ian Johnson, nutrition researcher and emeritus fellow, Quadram Institute Bioscience, who wasn't involved in the research.
"Surprisingly perhaps, the increased risk of cancer in heavier consumers of sugary drinks was observed even among consumers of pure fruit juice -- this warrants more research," Johnson told the Science Media Centre in the UK.
Mathilde Touvier, lead author of the study which was published Wednesday in medical journal BMJ, said that the findings added to research showing that reducing how many sweetened beverages we drink would be beneficial for our health.
"What we observed was that the main driver of the association seems to be really the sugar contained in these sugary drinks," said Touvier, who is the research director of the Nutritional Epidemiology Research Team of the National Health and Medical Research Institute at the Paris 13 University.
Physician groups call for taxes and regulations on kids' access to sugary drinks
Physician groups call for taxes and regulations on kids' access to sugary drinks
Touvier said her team observed that sugar seemed to be the main driver of the link.
"High sugary drinks consumption is a risk factor for obesity and weight gain," she said, and, "obesity is in itself a risk factor for cancer."
Another possibility is that additives, such as 4-methylimidazole, which is found in drinks that contain caramel coloring, could play a role in cancer formation.
Touvier suggested that people should stick to public health guidelines that recommend limiting sugary drinks to a maximum of one glass a day.
Responding to the study, the American Beverage Association stressed the safety of sugary drinks.
"It's important for people to know that all beverages -- either with sugar or without are safe to consume as part of a balanced diet," Danielle Smotkin, a spokeswoman for the American Beverage Association said in a statement.
"That said, America's leading beverage companies are working together to support consumer' efforts to reduce the sugar they consume from our beverages by providing more choices with less sugar or zero sugar, smaller package sizes and clear calorie information right up front."
No link found with diet sodas
One-month sugar detox: A nutritionist explains how and why
One-month sugar detox: A nutritionist explains how and why
The research found no link between diet beverages and cancer. The authors warned that this finding should be interpreted with caution, as this type of beverage had a relatively low consumption among the study participants.
A study published earlier this year found that drinking two or more of any kind of artificially sweetened drink a day was linked to an increased risk of clot-based strokes, heart attacks and early death in women over 50.
However, Catherine Collins, a dietician in the UK's National Health Service, said that the absence of cancer risk in using diet drinks was the "take-home message" of the research.
"For too long the nutri-myth of sweeteners being a health risk has remained in popular culture," she told the Science Media Centre in the UK.

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