Can you explain this? As I said recently, the whole GI thing is overplayed. Far more relevant is the Glycemic Load (GL) of each serving. The GL takes into account the GI as well as the amount of carbs per serving. The GL is the GI value multiplied by the actual number of carbs per serving. The carbs in a good MRP will typically provide a GL of around 1300, -roughly the equivalent to half a banana or less than half a cup of low GI brown rice!
Also, an insulin spike of not too excessive duration will decrease protein degradation and improve protein retention, i.e. improve anabolism.
Like I said in my post, 1300 is roughly the equivalent to half a banana or less than half a cup of low GI brown rice. It is going to depend on how your body responds to that load. I would suspect that that amount is not going to be a problem.
I would reiterate this though:
FatRat said:
...an insulin spike of not too excessive duration will decrease protein degradation and improve protein retention, i.e. improve anabolism.