Join Professor John Speakman, from the University of Aberdeen, and Dr. Nidia Rodriguez-Sanchez, a hydration expert from the University of Stirling, as they delve into the fascinating science of how much water we truly need. They explore how factors like age, weight, and environment impact individual hydration requirements. Marathon runner Johanna Perry shares her alarming experience with overhydration during a race, highlighting the fine line between too little and too much water. Discover practical tips and insights for optimizing hydration!