at my last job i used to always see everyone constantly drinking coffee, tea, coke etc during the day to keep them going. However in the toilets there was a big poster that explained the main reasons for fatigue felt at work was due to dehidration and explained the benefits of drinking plenty of water during the day. i used to constantly have a big bottle of cold water at my desk an found whenever i fould start eeling tired and grumpy id feel better after a drink. There are so many more natural, healthy ways to make you feel better when working that overdosing on caffeen.
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