Coffee is linked to many health benefits, including increased longevity in some populations.
Research has shown that caffeine, one of many active compounds found in coffee, is a central nervous system stimulant and improves vigilance, attention and reaction time. It may also support athletic endurance and exercise efforts.
Substances in coffee help reduce the risk of chronic disease , protect liver and beta cell function, which is essential for the release of insulin to control blood sugar levels. People who regularly drink 1-4 cups of coffee a day may have a lower risk of Alzheimer's disease.
However, using too much coffee in a short period of time can cause unwanted side effects such as poor sleep, anxiety, heart palpitations, irritability, digestive disorders...
Studies show that 400 mg/day of caffeine is safe for adults. The average cup of coffee contains about 100mg of caffeine, most adults can drink 3-4 cups of brewed coffee per day without side effects.
