23 September 2025

18 minutes

Available for over a year

Chris and Xand continue their conversation about fibre with Dr Deirdre Tobias, an obesity and nutritional epidemiologist at the Brigham and Women's Hospital and Harvard Medical School in Boston, USA.

Together, they dig further into the relationship between our fibre intake and our microbiome. Plus, they delve into some of the socioeconomic aspects of increasing our intake of fibre.

If you’d like to share your thoughts on this or any other topic covered on the podcast, you email us at [email protected] or Whatsapp on 08000 665 123.

Presenters: Drs Chris and Xand van Tulleken

Guest: Dr Deirdre Tobias

Producers: Maia Miller-Lewis and Jo Rowntree

Executive Producer: Rami Tzabar

Editor: Kirsten Lass

Maia Miller-Lewis

Researcher: Grace Revill

Tech Lead: Reuben Huxtable

Social Media: Leon Gower

Digital Lead: Richard Berry

Composer: Phoebe McFarlane

Sound Design: Ruth Rainey

At the BBC:

Assistant Commissioner: Greg Smith

Commissioning Editor: Rhian Roberts

A Loftus Media production for BBC Radio 4.