Naked Science Forum

General Science => General Science => Topic started by: glovesforfoxes on 06/12/2009 02:46:22

Title: Why do potatoes have a high glycemic index (GI)?
Post by: glovesforfoxes on 06/12/2009 02:46:22
It seems, since they're starchy, that they shouldn't. Can anyone explain why they are?
Title: Why do potatoes have a high glycemic index (GI)?
Post by: DrN on 07/12/2009 21:46:49
Starch is polysaccharide, so it's made up of long chains of sugar molecules (glucose). When it's digested, it's basically turned into sugar, hence the high glycaemic index.
Title: Why do potatoes have a high glycemic index (GI)?
Post by: glovesforfoxes on 08/12/2009 00:10:11
I figured it would take longer for the digestive enzymes to break the starch down, but I guess the high heat in cooking does that in part anyway. Cheers DrN.
Title: Why do potatoes have a high glycemic index (GI)?
Post by: Nizzle on 08/12/2009 06:23:39
Starch is one of the few things that doesn't wait to get to the stomach to be digested but is already being digested by saliva...

You can do a "kitchen experiment". Keep a small potato in your mouth for quite some time, and it will slowly start to taste sugary