Originally Posted by
Carbonfiberboy
Neither of those are maltodextrin-based. Hammer's been preaching the malto thing forever and I think they're right about it. The limit is how fast one can get it across the stomach wall and I think malto is quicker. I have fewer stomach issues on hot climbs when I'm using it. A big thing for me (and others) is that malto is not sweet. That means one can use it all day without tiring of it, getting mouth burn, etc. I've been using it on the bike for over 20 years as my main source of nutrition.
I meant instead of the fructose only, or instead use malto alone. Malto and glucose have roughly the same uptake except at your extreme limit as the only difference in is osmolality and the breakdown must occur before uptake. For maximal uptake you want ~2:1 glucose(or malto): fructose. But unless you are trying to consume more than 100g total/hour then just malto at ~60g/hr or under is fine