Glucose paradox
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Glucose paradox is a theory formulated by biochemist Dr. J. D. McGarry and his research associates. It is a theory that demonstrates the importance of lactic acid in carbohydrate metabolism.
After the digestion of carbohydrates and their entering into the circulatory system in the form of glucose (blood sugar), some glucose rather than going directly to the liver and being converted into glycogen, much of glucose, especially in situations of energy depletion and exercise, will be absorbed directly into the muscle tissue and convert into lactic acid in the anaerobic energy system.
The lactic acid is then taken to and converted by the liver into the building blocks for liver glycogen. Much of the body's liver glycogen is produced indirectly from lactic acid rather than directly from glucose in the blood.
References
- 10 THINGS YOU SHOULD KNOW ABOUT LACTIC ACID: OLD MYTHS AND NEW REALITIES, by Thomas Fahey, Ed.D., Professor of Exercise Physiology, California State University at Chico
- BRASS C.A., CRAWFORD J.M., NARCISO J., GOLLAN J.L.. (1992) Hypoxic liver injury and the ameliorating effects of fructose: the 'glucose paradox' revisited. Am. J. Physiol. 263: G293–300.
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