Gut microbiota alterations in obesity remain the subject of debate. Writing in Nature, Vieira-Silva and colleagues found that the undesirable Bacteroides 2 enterotype was more frequent in people with a higher body mass index, but not if they were taking statins.

Large inter-individual variability exists regarding how our gut microbiota responds to dietary intervention. New findings in mice and people with obesity show that ‘responders’ to inulin may be identifiable from their gut microbiota before they receive the intervention.

Personalized nutrition is still in its infancy but it is an increasingly important area of research that may one day help us better plan nutritional interventions to ensure a better response from patients.