Runners question!

May 30, 2023

Hi! I'm 12yrs post surgery and the only issue I have is low iron. I've just agreed to do a marathon for the first time! Most I've ever run is 5km .   I'm wondering if there are any marathon runners on here with some advice on energy gels. What made you dump? Sugar surges? Upset stomach? I'll take whatever advice I can get!   Thanks! 

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