When are you most sensitive to caffeine?
Only if you consume very large quantities of caffeine, side effects can occur such as: sleeplessness, headaches, frequent urination, jitteriness and a disturbed coordination.
Some people don’t tolerate caffeine very well. A heightened sensitivity to caffeine seems to be the main cause. They experience stomach problems, feel stressed, sleep poorly, have an increased heart rate or even a temporary irregular heartbeat. Experts say that most people easily tolerate 2 to 4 cups of coffee per day, equal to 200 to 300 milligrams of caffeine. Consuming more than 400 milligrams of caffeine per day can lead to sleeplessness, irritability, stress, excessive perspiration, loss of concentration, an increased heart rate, anxiety, and headaches.