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  • Free
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  • Speech-to-text
Claudia Hammond sitting in front of a standing microphone and wearing headphones talking to another speaker during an event.
Claudia Hammond, Photo: Kathleen Arundell. Source: Wellcome Collection. Attribution-NonCommercial 4.0 International (CC BY-NC 4.0).

What you’ll do

As a flavouring and preservative in food, as saline solution in medical and health care and in so many other forms, we encounter salt in our day-to-day lives without giving it much thought.

Join Claudia Hammond and a panel of scientists and experts, including Professor of Chemistry Andrea Sella, Professor Dike Ojji, a researcher in heart disease and blood pressure, Health Economics Professor Céu Mateus as they discuss the role of salt in our lives and food historian Pen Vogler.

The audience will have the chance to ask questions afterwards. You can participate or just listen in. 

The event will be recorded live with an audience and edited into a programme to be broadcast on the BBC World Service as part of ‘The Evidence’ series. After broadcast, episodes of ’The Evidence’ will be available on the BBC website.



Need to know


We’ll be in the Reading Room on level 2. You can walk up the spiral staircase to the Reading Room door, or take the lift up and then head left from the Library Desk.

Place not guaranteed

Booking a ticket for a free event does not guarantee you a place. You should aim to arrive 15 minutes before the event is scheduled to start to claim your place. If you do not arrive on time, your place may be given to someone on the waiting list.

Waiting list

If this event is fully booked, you may still be able to attend. We will operate a waiting list, which opens 30 minutes before this event starts. Arrive early, and we’ll give you a numbered ticket. If there are any unfilled places just before the start time, we will invite you to enter in order of ticket number.


This event will be live-transcribed, with text displayed on a large screen.

For more information, please visit our Accessibility page. If you have any queries about accessibility, please email us at access@wellcomecollection.org or call 0 2 0. 7 6 1 1. 2 2 2 2

Our event terms and conditions

In partnership with

BBC World Service


The BBC World Service is the world’s largest international broadcaster. It broadcasts radio and television news, speech and discussions in more than 40 languages to many parts of the world.

Photographic black and white, head and shoulders portrait of Claudia Hammond.

Claudia Hammond


Claudia Hammond is an award-winning broadcaster, writer and psychology lecturer. She is the presenter of ‘All in the Mind’ and ‘Mind Changers’ on BBC Radio 4, and ‘The Evidence’ and ‘Health Check’ on the BBC World Service.

Black and white photograph of the head of a middle-aged woman with short curly hair. She is smiling and looking directly at the camera.

Céu Mateus


Professor Céu Mateus holds the Chair of Health Economics in the Division of Health Research at Lancaster University. She has over 25 years of experience in research and has developed her expertise in the interface between economics and public health, namely in the economic evaluation of health technologies and interventions and the impact of social determinants of health.

Black and white photograph of the head and shoulders of a middle-aged man wearing glasses. He is looking directly at the camera.

Dike Ojji


Professor Dike Ojji is Chair of Internal Medicine and an Associate Professor of Medicine and Preventive Cardiology at the College of Health Sciences, University of Abuja, Nigeria. He is also Lead Investigator, Cardiovascular Research Unit, University of Abuja and the Director of the Institute for Advanced Medical Research and Training. His research investigates the spectrum of hypertensive heart disease and hypertension pharmacotherapy in the Black population, to establishing a system for hypertension and cardiovascular care in low- and middle-income countries. His work also informs policy on the levels set for national dietary sodium. He is currently the principal investigator for a number of US National Institutes of Health research and training grants.

Black and white photograph of the head and shoulders of a middle-aged woman. She is looking directly at the camera.

Pen Vogler


Pen Vogler is a food historian and writer whose work explores how our social and political histories influence what we eat today.  Her books include the Sunday Times bestseller Scoff: A History of Food and Class in Britain and Stuffed: A History of Good Food in Hard Times in Britain.

Black and white photograph of the head and shoulders of a middle-aged man with glasses. He is looking directly at the camera.

Andrea Sella


Professor Andrea Sella is a Professor of Chemistry at University College, London. He is Italian but grew up in New York and Nairobi before going to the universities of Toronto and then Oxford. In addition to teaching Chemistry to chemists and life-science students, his research spans the chemistry of the element phosphorus, the structural behaviour of ice, and how to minimise the energy consumption of chemistry labs. He writes a monthly column called ‘Classic Kit’, a history of chemistry in terms of laboratory apparatus. He is a regular contributor to BBC radio and television.