The human brain makes fructose, researchers discover – here’s why that might be a big deal
Not all sugars are equal. Glucose is a simple sugar that provides energy for the cells in your body. Fructose has a less important physiological role and has been repeatedly linked to the development of obesity and type 2 diabetes. When there is excess glucose the processes that break it down can become saturated, so the body converts glucose into fructose instead, using a process known as the “polyol pathway”, a chemical reaction involved in diabetic complications. The researchers at Yale reported in the journal, JCI Insight, that the brain uses the polyol pathway to produce fructose in the brain.
Importantly, research has shown that exposure to fructose can significantly alter the expression of hundreds of genes in the brain, including genes that control metabolism, cell communication, inflammation and brain function. This suggests that fructose is likely to alter brain function.