[quote]Nomancer wrote:
I’ve heard that waxy maize starch absorbs even faster than dex or malto? Any truth to this?
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To be more specific and to avoid confusion, nearly all ‘Waxy’ starches (and just like maltodextrin they have varying sources such as maize, rice ,barley and sorghum), will have no amylose and contain essentially 100% amylopectin. Sorghum BTW is a cultivated topical cereal grass.
Anyway’s, unlike the ‘waxy’s’… your average maltodextrin you will have a ratio of amylose to amylopectin.
As a basic food science lesson, amylose is the mostly straight-chain polymer, with long chains of glucose units joined by alpha 1,4 linkages.
Conversely, amylopectin, has branched-chained molecules and usually consists of shorter chains of glucose monomers linked by some alpha 1,4 linkages and many alpha 1,6 branch points.
The majority of these two polymers in any given starch granule depends on the plant of origin (hence my original point about classifying all Maltodextrins as the same), which also influences the number of glucose units. So you don’t have to be the worlds smartest dude to realise this is how the GI and other factors can be different.
As for Waxy Maize starch, as its more or less 100% amylopectin you get quicker absorption as starches that are high in amylopectin are digested and absorbed more quickly than starches with a high amylose content.
From this snippet we deduce also that a maltodextrin with a ratio of amylopectin to amylose which favours amylopectin will induce a greater insulin response, and vice versa.
Also, Amylopectin starch induces nonreversible insulin resistance in rats, so it may not be great to use long term as regular (but not specific!) maltodextrin.