Excessive water consumption can lead to electrolyte depletion, brain shutdown, and cardiac dysfunction.

“If you ingest a lot of water in a very short period of time, something called hypernatremia, you will excrete a lot of sodium very quickly, and your ability to regulate kidney function will be disrupted, but in addition to that, your brain can actually stop functioning, so people have actually consumed water to excess, especially after sports events and so forth, and if that water doesn't contain sufficient electrolytes, you can actually shut down neurons' ability to function at all by disrupting this balance of sodium and potassium and the amount of extracellular sodium and neurons' ability to signal to one another through action potentials”

“Yes, it's true, you can die from drinking too much water in particular because it forces you, if you drink too much water, you'll excrete too many electrolytes, and your brain will shut off. Actually, your heart will stop functioning properly. You don't want to overconsume water to the extreme either.”

“If you drink too much water, especially in a short amount of time, you can actually kill yourself. All right? And we certainly don't want that to happen. If you ingest a lot of water in a very short period of time, something called hyperetriia, you will excrete a lot of sodium very quickly and your ability to regulate kidney function will be disrupted. But in addition to that, your brain can actually stop functioning.”