Vitargo is a high molecular weight carbohydrate.
Studies have shown increased glycogen storage after ingestion of a high molecular weight carbohydrate, compared to a low molecular weight carbohydrate (IE: dextrose)
The high molecular weight "pulls" the carbohydrate through the gut, into the small intestine where the bulk of carbohydrate uptake occurs.
This osmalic pull can also increase uptake, and utilization of other nutrients as well.
The only problem is, the lower molecular weight of protein, and other nutrients can potentially decrease the molecular weight of the "meal" enough to reduce Vitargo's effectiveness.
Vitargo isn't the only high molecular weight carbohydrate, and I believe it isn't even the original formula anymore, as the original formula was more expensive to produce.
The "original" high molecular weight that Teh Chad used on Ronnie in 2003 was supposed to be a waxy potato starch, where Vitargo is supposed to be a waxy corn starch.