Why is salt water poisonous?

Salt water is not inherently poisonous, but it can be harmful to humans if ingested in large quantities due to its high salinity. When consumed, excess salt can lead to dehydration, as the body needs to use water to process and excrete the excess sodium. This can disrupt normal bodily functions and lead to serious health issues, including kidney damage and electrolyte imbalances. Additionally, drinking salt water can exacerbate existing health conditions and is not a suitable source of hydration.