I read an article about sports drinks and gels. From someone who needs to be hyper carb conscience, it’s important for me to look into the best options for what to eat during my race. I learned this Rule of Thumb, “…take 30-60 grams of carbohydrate every hour AFTER THE first hour, and you can try 30 grams”. Too much carb loading can be a disaster and not enough can stop me from getting through the race. Sports drinks have a diluted concentration whereas gels are more intense. I also learned that I need to concentrate on options that provide electrolytes as well.
You can read the below article from the Runner’s World that provides more information and may answer some questions you might have about your own training.