What is the common name for glucose in the bloodstream?

Glucose in the bloodstream is commonly referred to as blood sugar. This term is widely used in both medical contexts and everyday language to denote the concentration of glucose available for the body’s energy needs. Blood sugar levels are crucial for maintaining metabolic homeostasis, as glucose provides the primary energy source for cells.

Insulin, while closely related to glucose metabolism, is actually a hormone produced by the pancreas that helps regulate blood sugar levels. Lipids refer to a group of organic compounds that include fats and oils, which are distinct from carbohydrates like glucose. Cholesterol is a type of lipid that is involved in cell membrane structure and serves as a precursor for steroid hormones, but it is also separate from glucose. The specific term "blood sugar" captures the essence of glucose's role in the bloodstream, emphasizing its importance in nutrition and overall health.