Gel, GU or?
I did my first brevet series this year and tried a lot of different methods for calibrating my on-bike diet. The general deal is that different people have different preferences based on the state of their body and their current level of stress. What works for you might not work for your friend. Also, what works for you at 200K might not work 500km into a 600k. I leaned heavily on a diluted Hammer Gel mix to see me through the first half of a 600k, but my mouth got tired of maltodextrine later in the second day, and I reverted to eating Fig Newtons, peanut butter sandwiches and chocolate milk. So try a lot of different foods on your training runs, and see what agrees with you. Then bring your second best option as a backup. As handy and effective as the ‘tech’ foods might be; it’s also good to train with real food as well, in case you need to “forage” during the brevet. You can’t buy Perpeteum at a 7-11, but a V-8 is an awesome elec