Blood clots: The nation’s favourite drink could make your blood sticky – increasing risk

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Professor Whiteley noted tea – the nation’s favourite brew – contains caffeine, “which actually causes you to lose water”.

Thus, in addition to coffee and alcohol, tea “can make dehydration worse”.

The main indicators of dehydration include:

• Feeling thirsty
• Dark yellow or strong-smelling urine
• Feeling lightheaded
• A dry mouth.

“Dehydration means your body loses more water than you take in. Without enough water, your body cannot function properly, and you can become unwell,” Professor Whiteley added.