Caffeine acts as competitive inhibitor in which it transforms cAMP to noncyclic form and enables cAMP to build up in cells.
Caffeine brings stimulatory effects on the central nervous system and the caffeine intake is correlated to adverse health effects. Caffeine consumption may bring health benefits, such as Alzheimer’s disease and Parkinson’s disease, liver function and diminishes the risk of developing some cancers. However, caffeine can lead to glucose tolerance deterioration. Caffeine intake more than 400mg per day will link to adverse health effects. Anxiety, restlessness, nausea and headaches are some of the examples due to excessive amount of caffeine intake. Inappropriate amount of caffeine consumed by children leads to insufficient sleep which brings impacts on their studies. Patients with heart diseases should avoid mixing alcohol with caffeine since both of the compounds may raise the heart rate and cause cardiac arrhythmias (Mejia & Ramirez-Mares, 2014).