What is the absorption rate of fructose when combined with glucose?

When fructose is combined with glucose, the absorption rate is generally much higher due to the way these sugars are transported in the intestines. Glucose uses a specific transporter known as SGLT1 (Sodium-Glucose Linked Transporter 1), which actively transports glucose into the intestinal cells. Fructose, on the other hand, is taken up via a different transport mechanism, known as GLUT5.

When both sugars are present together, studies show that this dual mechanism can enhance the overall absorption efficiency. The presence of glucose can promote a more effective transport environment for fructose, resulting in a synergistic effect that allows for a greater combined absorption rate than if each sugar were consumed separately.

This enhanced absorption can be particularly beneficial during exercise, as utilizing a mix of carbohydrates can lead to improved performance and quicker recovery. The combination allows the body to maximize energy availability by utilizing both carbohydrates effectively.