A drink a day won’t keep the cancer away. New research shows even light amounts of alcohol consumption might raise people’s risk of several cancers. Scientists at the University of Washington in Seattle examined the medical literature on alcohol and cancer. They found convincing evidence that any amount of regular drinking is linked to a higher chance of breast, colorectal, and other cancers. At the same time, the clearest dangers of alcohol, for cancer or other health conditions, came from heavy drinking. “While potential health impacts at low-to-moderate levels varied by outcome, high levels of alcohol consumption were associated with increased risk across all outcomes,” the researchers wrote in their paper, published Monday in Nature Health. No threshold of safety for cancer The relationship between alcohol and our health can be complicated.…