Blood sugar levels refer to the amount of glucose present in the bloodstream. Glucose is a primary source of energy for the body's cells and is derived from the food we eat, especially carbohydrates. Maintaining balanced blood sugar levels is crucial for overall health, as both high and low levels can lead to various health issues. The body regulates blood sugar through hormones like insulin and glucagon. Insulin, produced by the pancreas, helps lower blood sugar levels by facilitating the uptake of glucose into cells. Conversely, glucagon raises blood sugar levels when they drop too low. Monitoring these levels is essential for individuals with conditions like diabetes.