Why do we weigh a couple pounds less when we get out of bed in the morning compared to when we got in the night before?
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Think of your body like a car that is always running. It redlines when you sprint or do something really strenuous. It idles when you are sleeping. 24/7, it is burning fuel composed of sugars fats and carbohydrates to sustain the engine. Those chemicals combine with oxygen in your body making carbon dioxide and water plus energy as byproducts. At night, you continue to breath out that CO2 and H2O but you aren’t eating or drinking anything to replace it. So when you wake up you are lighter than when you went to bed because of the CO2 and H2O you exhaled overnight.
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