dc.description | Caffeine is one of the most commonly consumed stimulants in the general population. It is found in a variety of foods
and beverages, including coffee, tea, chocolate, cocoa products, soft drinks, and energy drinks. In addition, it is
increasingly used as an ingredient in prescription and over-the-counter medications for colds, influenza, headache,
menstrual symptoms, weight loss, and central nervous system stimulation. The effects of caffeine on the body are
mediated via interaction with a number of receptors, including adenosine, adrenergic, cholinergic γ-aminobutyric
acid, and serotonin receptors. After ingestion, caffeine is readily absorbed into the bloodstream and distributed to the
tissues. During pregnancy, elimination of caffeine is prolonged and it rapidly passes all biological membranes,
including the blood-brain and placenta barriers, resulting in exposure of the fetus and infants poorly metabolize
caffeine until 3 months of age. A maximum intake level of caffeine for pregnant women has been stipulated by several
authorities, most of which agree that it should not exceed 200 mg/day | en_US |