Number of daily coffees adults can safely drink each day revealed as scientists say 400mg of caffeine is safe

DRINKING up to five cups of coffee daily is fine for most adults, a study says. Researchers found 400mg of caffeine per day is perfectly safe to consume. Drinking up to five cups of coffee daily is fine for most adults, a study says Credit: Getty Researchers found 400mg of caffeine per day is perfectly safe to consume Credit: Getty That is the equivalent of getting through five 8oz cups that do not have sugar, milk or other ­flavours added to them. US scientists also linked drinking caffeinated black coffee to a lower risk of heart disease, strokes and diabetes for some individuals. Sign up for the Health newsletter Thank you! But higher amounts of the stimulant — such as the levels found in energy drinks or energy shots — may increase the risk of ­suffering high blood pressure and irregular heart rhythm. The American Heart Association research, published in the journal Circulation, warned that more data was needed on how caffeine impacts different people. Some may feel stronger effects compared to others, depending on age and medical history. Prof Gregory Marcus, of the University of California, said: “Caffeine consumed in coffee is a key part of daily life for millions of people. “In our review of the most recent research, for most adults, intake of up to 400 mg of caffeine/day, the equivalent of up to five cups of caffeinated coffee per day without added sugars or fillers, is safe and does not increase cardiovascular risk. “However, high doses of caffeine, such as those found in energy drinks including energy shots, may have harmful effects on the heart and should be avoided. Most read in Health “Short-term effects of caffeine may include temporary increases in blood pressure, heart rate, blood sugar and alertness. “Some people may experience heart palpitations and/or sleep disruption.” Comment now