Why can dehydration cause low energy?

Dehydration refers to a state where the body doesn’t have an adequate amount of fluid. It can lead to various symptoms, including thirst, low energy levels, fatigue and dizziness.

Several factors contribute to dehydration’s influence on low energy. Let’s take a look at these factors below.

Reduce circulation

Dehydration causes a reduction in blood volume, lowering blood pressure and making it harder for the heart to pump blood efficiently. This reduces the amount of oxygen and nutrients that get delivered to the organs of the body and the brain, resulting in fatigue and lethargy.

Electrolyte imbalances

Being dehydrated disrupts the balance of electrolytes in your body. In particular, imbalances in sodium and potassium result in reduced central nervous system function and slower muscle contractions, both of which contribute to weakness and fatigue.

Reduced metabolic efficiency

Metabolic processes are required to convert ingested food into usable energy within the body. Being dehydrated slows down the rate of metabolism, thereby reducing the amount of energy that is available to the body’s cells and causing feelings of sluggishness.

Cognitive impairment

Dehydration affects the brain as well as the body. Mild to moderate dehydration can lead to difficulty concentrating, a reduced capacity for memory and learning, and impaired cognitive function. These mental impairments can make you feel like you have less energy because your brain works less effectively.