Caffeine is a natural alkaloid substance with stimulant properties, found mostly in coffee, tea and chocolate. While moderate consumption of caffeine is usually harmless, for certain people the excessive consumption of caffeine may irritate the stomach and cause anxiety, insomnia and headaches. In addition, the excessive consumption of caffeine may damage your bones, as it hinders the absorption of vitamins and minerals, including calcium. It is important to consider that caffeine is not only found in drinks, but may also be found in food and medicine (especially pain relievers and anti-flu medication).
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