I used to do and in fact lead a lot of long and pretty tough day rides ( I think at least one of the folk on here remembers my in/famous hell of chiddingly jauntette which on its first run ended prematurely with a mass, nay total, desertion and mutiny) and for those rides often used the SIS concoction which provided carbs as well as electrolytes. Then I moved towards using "normal food", malt loaf, my own patented cycling snack, lidl breakfast goods, lidl wine gums (quick shelf research seemed to show that they were the cheapest source of sugar), spoons breakfasts and beer, and espresso coffee. Topped up with zero tabs for the electrolytes to avoid cramp. Have done 140 miles non stop on that lot quite recently but am considering for more longer rides using some carbs in the drinking bottle again. Anyone got any views on this? https://www.myprotein.com/sports-nutrition/100-maltodextrin-carbs/10530114.html ie maltodextrin. so its the maltodextrin I'm seeking views on. They keep sending me promo codes and I may eventually relent. Please note I am not interested in protein stuff/building muscle mass (will use food for the protein) or advanced body shaping. Just stuff to keep me going through a long ride and avoid the dreaded bonk, which I have hit a couple of times before I was more educated. Suitably scientifically equipped I may rerun my old Chiddingly ride solo for old time's sake/check if I'm still up to it. edit: for some reason the headline blurb on that product listing gives the impression that it's just for AFTER use, not sure why, for reading on confirms what I thought, that it can also be used DURING. Not sure why they did that - concerned that folks might do actually rather tiddly exercise, flatter themselves, then gorge on the stuff and so ballooning? I have never been interested in "scientific" AFTER preparations - I have my own ways of recovering/refuelling after tough rides.