Of course, too much caffeine can cause restlessness, anxiety, irritability, tremors, sleeplessness, headaches, gastrointestinal symptoms and abnormal heart rhythms.

• 当然，过多的咖啡因会导致烦躁、焦虑、兴奋、震颤、失眠、头痛、胃肠道症状以及不规律心律等等。