Water Fuels Brain Activity

The brain is not the only organ that is overactive when you become dehydrated. The kidneys, adrenal glands, and pituitary glands all increase their activity. The adrenal glands, which sit atop your kidneys, are involved in the stress response and the regulation of blood pressure. When dehydrated, the adrenal glands release a hormone called cortisol. This stress hormone is essential for survival in the short term, but it can be harmful to long-term health. Overproduction of cortisol can lead to chronic fatigue, weight gain, and muscle aches. In the worst cases, high levels of cortisol can lead to depression, memory loss, and vision problems. These are reasons enough to take water seriously.

Why Water Is Important for Your Brain

Water transports nutrients such as glucose, amino acids, and fatty acids to the brain and carries away waste products such as carbon dioxide and lactic acid. Its function can be compared to that of the arteries, veins, and lymphatic system in the rest of your body. While the rest of your body is focused on supplying nutrients and taking away waste, your brain is focused on supplying nutrients and removing waste, but with a major difference. The brain has a much higher metabolic rate than any other organ in your body.