Authored by Zachary Stieber via The Epoch Times,
Most adults can safely drink five cups of coffee a day, according to the American Heart Association.
The organization said in a July 20 statement that synthesizes research on caffeine that the latest studies indicate that for most adults, consuming up to 400 milligrams of caffeine a day - or up to five 8-ounce cups of coffee - without added sugar and milk is not only safe, but appears to result in a lower risk of cardiovascular disease.
A cup of coffee in Culver City, Calif., in a file photograph. Kevork Djansezian/Getty ImagesHigher levels of caffeine, such as those found in energy drinks, may harm the heart and blood vessels, the association said.
Most of the studies underpinning the guidance come from observational research, although there are a growing number of randomized, controlled trials that examined the relationship between caffeine and various health problems, including a trial that found no impact on glucose levels.
The data suggest that moderate consumption of caffeine lowers the risk of cardiovascular disease and stroke, among other problems, but that coffee consumption does increase premature ventricular contractions, or extra heartbeats, the group said. It indicates high doses of caffeine can lead to significant increases in blood pressure, particularly in people who already had high blood
