Used as an intravenous fluid to provide hydration and calories in patients unable to eat or drink. Commonly administered in hospitals to treat low blood sugar (hypoglycemia), dehydration, and to support energy needs during illness or surgery. Also serves as a diluent for medications given through IV. In oral form, it helps in rehydration and energy replenishment, especially in cases of diarrhea or exhaustion. Widely used in medical testing, such as glucose tolerance tests for diabetes diagnosis.