Pretty unsurprisingly, this study found that creatine improves carbohydrate absorption and can positively influence the process of nutrient partitioning, which essentially means that creatine helps deliver the carbs we consume into the muscles where they are to be used for fuel and tissue recovery, instead of storing them for later. (fitnessandpower.com)
If not, wouldn't potassium be a natural nutrient partitioning agent that would make potato a good choice for carbs? (jackkruse.com)
Either the compound itself speeds the metabolism, or it assists in nutrient partitioning. (completehumanperformance.com)