Mixed

A high pre-treatment Prevotella-to-Bacteroides (P/B) ratio predicts significantly greater body fat loss when consuming a high-fiber, whole-grain diet (New Nordic Diet) compared to a standard diet, whereas individuals with a low P/B ratio show no such differential benefit.

If you are trying to lose fat using a high-fiber, whole-grain diet, your gut bacteria composition matters. A simple test of your Prevotella-to-Bacteroides ratio can predict success: if your ratio is high, you are likely to lose significant fat on this diet; if it is low, you may not see benefits over a standard diet, suggesting you might need a different nutritional approach.