Glycemic Index of Parboiled Rice verses Brown Rice.

[chicagobuffedbod]

Cooking conditions and also length of cooking time will effect the GI as well.
BMJ

That's definitely true. That's why pre-cooked brown rice, pre-cooked barley and pre-cooked canned beans have a higher glycemic index. Because they cook the hell out of them and then package them and then you cook them again to prepare it.