"Fat, especially saturated fat, is the dietary whipping boy of scientific research and nutritional advice. Rarely are researchers cognizant or motivated enough to look for other dietary explanations for increased permeability. Nor are many aware of what small intestinal bacterial overgrowth is, let alone how it can explain many of the findings in their studies.
Nonetheless, the growing recognition of “leaky gut” as a primary cause of glucose and lipid dysregulation and visceral fat accumulation is a welcome development. I look forward to more studies along these lines."
Intestinal Permeability and Visceral Fat Accumulation - Syontix