( right ) got severe headaches when he quit caffeine . Up to 90 percent of North Americans consume caffeine products every day . Score: 7 Symptoms include headache , fatigue , sleepiness , inability to focus . The higher the caffeine intake , the more likely a patient will suffer .
Up to 90 percent of North Americans consume caffeine products every day . Score: 7 Symptoms include headache , fatigue , sleepiness , inability to focus . The higher the caffeine intake , the more likely a patient will suffer .