Why do I go off coffee when I’m unwell?

Readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific concepts
  
  

A young woman drinks a cup of coffee.
Yuck, it's just not doing it for me … Photograph: Aurora/Getty Creative Photograph: 44720.000000/Getty Images/Aurora Creative

Why do I (and several coffee-loving friends I’ve asked) go off coffee when we have a cold or generally feel unwell?

Jen Pickard

• Post your answers – and new questions – below or email them to nq@theguardian.com. Please include name, address and phone number

 

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