Is blood sugar high or low when hungry?
Recently, I often feel palpitations and shaky hands when hungry, but sometimes my blood glucose level is actually high—why is that? When hungry, should blood glucose be high or low?
Doctor's answer (1)
Blood sugar levels during hunger mainly depend on the degree of hunger. If it's mild hunger, blood sugar typically decreases, but in cases of severe hunger, blood sugar might rise.
When the body experiences mild hunger, blood sugar levels generally drop. At this time, the body's energy reserves are insufficient, and there is not enough glucose to break down and provide energy, leading to a decrease in blood sugar levels. This is a normal physiological phenomenon, and blood sugar can be stabilized by appropriately consuming food to replenish energy.
However, when food is withheld for extended periods, resulting in severe hunger, blood sugar levels initially drop. To maintain normal physiological functions, the body initiates a series of reactions to raise blood sugar. The liver converts stored glycogen into glucose and releases it into the bloodstream. At the same time, insulin secretion decreases, while the secretion of hormones such as glucagon and adrenaline increases, promoting the conversion of fats and amino acids from muscles into glucose. This process is called gluconeogenesis, and elevated blood sugar levels may be observed.
It is recommended to maintain regular and balanced eating habits daily. If abnormal blood sugar levels frequently occur during hunger, seek medical attention promptly for relevant examinations and treatment.
