Question

fructose is subject to more rapid glycolsis than glucose, and is phosphorylated by fructokinase, which is not affted by insulin or fasting. What affect, then, would large intakes of fructose have in different situations, i.e., under intense exercise, starvation, or carbohydrate loading. Specifically, what kinds of differences would we expect to see in terms of esterification of fatty acids, gluconeogenisis, and blood glucose levels?

Answer 1

If fructose is taken in intense exercise it acts as best body fuel to perform the intense exercise but it cannot restore into the body muscle as energy.As the equivalent to the glucose it acts as a boost to perform the intense exercise.

Intake of fructose after starvation makes high increase in serum fructose level more than the control level compared to glucose.Also it is not affected by fasting the fructose gives the lactate as end product and the serum will more lactate level than their control level.

Fructose intake for carbohydrate loading is unsuitable.Carbohydrate loading means the practice of storing more glycogen into the liver and the muscle stores which is essential for performance of the physical activities.Usually it is practiced by the sports players.They increase the more consumption of the glucose containing foods and they metabolized and stored as glycogen in liver and other muscle stores.If fructose is taken for it it is metabolized into glycogen in liver but it not metabolize and store glycogen in the muscles.So it is not suitable for carbohydrate loading.

In comparing with the glucose , it is metabolized and store more lactate level than glucose.In esterification of fatty acids it produce VLDL more that is it produce more bad cholesterol.But glucose not produce more bad produce instead it produce good cholesterol. In Gluconeogenesis it produce glucose stores only in the liver.Less effective compare to glucose.Increase in blood glucose level are comparatively less for fructose it is often tolerate by the diabetic clients.