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Lucozade Sport's Lead Sport Scientist Nick Morgan will be online between 1pm and 2pm today to answer any queries you might have about fuel and hydration strategies in the context of your marathon preparations.
Nick has been advising our Lucozade Sport Super Six on their Flora London Marathon nutrition strategies but this is your opportunity to pick his brains with any nutrition questions you might have.
We're starting this thread now so you have a chance to post your queries beforehand - that way, Nick will be able to hit the ground running rather than having to deal with too many questions all at once.
Time to get posting!