On this guest THROWBACK episode of The Therapy Edit, Anna asks author, Zoe co-founder and Professor at Kings College London for his One Thing. Tim offers mums around the globe the advice that calories are meaningless when it comes to measuring how healthy your diet is.

Tim is one of the top 100 most cited scientists in the world and is the author of three books, the most recent of which is Food for Life.

You can learn more about Tim by following him on Instagram at @tim.spector and you learn more about the health and wellness website Zoe (which runs the largest in-depth nutritional science study to help you reach your best health) at @zoe