Hey there! I'm really sorry to hear about your friend. Cancer is a tough thing to deal with, and my thoughts are with you. As for the gels, I completely understand your concern. When we're cycling, our bodies prioritize blood flow to the legs, so digestion can get a bit slower. This could affect how the sugars in gels are absorbed. It's always a good idea to listen to your body and find what works best for you. Stay strong and keep those legs spinning!