Post-Carbohydrate Muscle Weakness

The body shifts potassium out of muscle cells to handle the glucose load, leaving muscles temporarily depleted. When a large amount of carbohydrates is consumed, the body's demand for potassium spikes sharply because potassium is required for glucose metabolism. A single large carbohydrate load can deplete potassium rapidly, with symptoms appearing within hours. The severity of post-carb symptoms can range from significant limb weakness and heaviness to temporary paralysis in extreme cases. Heart palpitations and faintness can accompany acute potassium depletion following a high-carb meal.