Which condition can become fatal if untreated?

Low blood glucose levels, also known as hypoglycemia, can lead to serious and potentially fatal complications if left untreated. Blood glucose is the primary source of energy for the body's cells, particularly for the brain. When glucose levels drop too low, it can result in symptoms such as confusion, weakness, dizziness, and in severe cases, loss of consciousness or seizures. If hypoglycemia is not promptly addressed, it can result in severe neurological damage or even death.

In contrast, while low blood pressure, high cholesterol levels, and high blood pressure can also pose health risks and lead to serious health issues over time, they do not typically present immediate, acute life-threatening situations like severe hypoglycemia. For instance, low blood pressure may cause dizziness or fainting but rarely leads to death in an acute scenario without other underlying conditions. High cholesterol can contribute to long-term cardiovascular disease but is not acutely fatal on its own, and high blood pressure, while dangerous over time, often does not cause immediate symptoms that could lead to death if not treated.