Fat, Sugar, the Human Microbiome, and Cognitive Function

Fat, sugar cause bacterial changes that may relate to loss of cognitive function

A study indicates that both a high-fat and a high-sugar diet, compared to a normal diet, cause changes in gut bacteria that appear related to a significant loss of 'cognitive flexibility,' or the power to adapt and adjust to changing situations. This effect was most serious on the high-sugar diet, which also showed an impairment of early learning for both long-term and short-term memory.

…A study at Oregon State University indicates that both a high-fat and a high-sugar diet, compared to a normal diet, cause changes in gut bacteria that appear related to a significant loss of “cognitive flexibility,” or the power to adapt and adjust to changing situations.

This effect was most serious on the high-sugar diet, which also showed an impairment of early learning for both long-term and short-term memory.