Okay, maybe some of those folks with more knowldge or access to research can clear up this and some other question. What are the clearance times for various macronutrients?
For example, when carbs are absorbed the resulting insulin release generally clears them from the bloodstream fairly quickly. This has been measured a fair amount and gives us the GI/II values. If we are lucky carbs go to the muscles and if not they find their way to fat cells.
When fats are absorbed, via the lymphatic system, they finally enter the bloodstream a fair amount of time after initial ingestion. How long do they stay there? Since they don’t generally cause insulin release on their own what is the clearance process? How long does it take?
As for protein breakdown into amino acids, I’m not really very aware of the timing involved. Since we eat every three hours or so I’m assuming they will be entering or be in the bloodstream for approximately that length of time. Is the liver processing these if they aren’t being taken up by the muscles? Are they preferentially driven into muscles in the presence of insulin?
I guess a good time graph showing the blood levels of carbs, lipids and amino acids following various types of meals would be great. If we could get that for trained subjects both at rest and during physical effort that would be even better.
[It looks like I might be spending some hours Googling over the next couple of days since I have so many questions.]
Anyway, based on the thread pointed to by Deuce, I’m curious about microtiming the various macronutrients.
I’m also going to step out on a limb and hypothesize about Insulin resistance. Would it make sense that we become more insulin resistant as our cells become filled to capacity with nutrients? Then, in the morning or after a workout when our cells have depleted their reserves insulin is suddenly more effective at driving in nutrients? A dangerously simple interpretation.
Anybody care to pontificate about these issues and or discuss micromanagement of blood levels of these nutrients for various goals?