Coffee was once believed to be a possible carcinogen. However, the evidence is consistent that coffee in moderation is associated with a lower risk of mortality.
Research found moderate coffee drinkers had less cardiovascular disease and premature death from heart attacks and stroke. They are less likely to suffer from Type 2 diabetes, Parkinson's disease and liver conditions. However, research into coffee’s impact on health is ongoing and most of the work in this field is observational.
Caffeine is a psychoactive drug. A moderate amount can wake you up, lift your mood, energy, alertness, concentration, and athletic performance. On average, it takes four to six hours to metabolize half the caffeine.
Withdrawal symptoms include a headache, fatigue, irritability, difficulty concentrating, and depressed mood.
Coffee beans are inside the red fruit of Coffea. They are green in color and turn a rich brown hue after roasting.
There are about 124 Coffea species, and most flavors remain unknown. Two species are mainly used for our coffee: arabica and canephora, known as robusta. Arabica costs more and fills specialty cafes, while the more common robusta is used for instant coffees and some espressos.
One study found that those adding sugar, cream or milk to their coffee had the same associated benefit as those who preferred it black.
However, sweet coffee and tea are the fourth largest source of sugar in the diets of adults and is concerning.
If you are enjoying coffee in moderation, doctors say you can continue onward and enjoy it.
A moderate amount would be 3 to 5 cups or up to 400 milligrams of caffeine a day.