Do you know how much water you should drink? Many global guidelines recommend approximately two litres a day for women and 2.5 litres a day for men, including food.
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But scientists say there is actually huge variation in how much each of us need as individuals.
Ruth Alexander speaks to Professor John Speakman at the University of Aberdeen in Scotland, who explains why your age, sex, weight, and other environmental factors such as air temperature, humidity and altitude all make a difference.
Dr Nidia Rodriguez-Sanchez, senior lecturer at the University of Stirling in Scotland, explains why our bodies need water and what happens if we drink too little, or too much.
That happened to Johanna Perry in the UK, she tells Ruth what happened when she drank too much water whilst running the London Marathon in 2018.
00:00 Do you know how much you should drink?
03:11 Why do we need water
05:48 How much should we be drinking?
12:14 Getting ahead of your thirst
12:53 Dangers of drinking too much water
16:50 What counts as hydration?
19:50 Tips and tricks to staying hydrated
21:45 Effect of salty snacks
23:47 The difference of opinion over hydration
Presented by Ruth Alexander
Produced by Beatrice Pickup
Check out more episodes of The Food Chain here 👉🏽 https://www.youtube.com/playlist?list=PLz_B0PFGIn4f4kxjsAfebFJku6zL3ZyEY
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