10 Work Snacks That Are Making You Sleepy (Slideshow)

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Oatmeal

A nice steaming bowl of oatmeal might be delicious in the morning, but if you’re reaching for it mid-day, be aware that it will trigger insulin production which could theoretically spike and make you quite tired. Other grains can also be in this category given they contain a high amount of carbohydrates which can cause fatigue by raising a person’s serotonin levels. 

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