Can you post these other studies? All I found was this one establishing a Insulin index which was done by a Susanne Holt who was a graduate student at the time and since receiving her doctorate has never followed up on her studies preliminary results.
I'll have to take a look back through my notes
We are talking about a keto diet so the 50g cho consumptions would apply here. We are comparing the insulin response of a bowl of oatmeal to a piece of steak not a piece of steak with 50g cho.
My point was the meat used the study (the one I posted) was 70% protein and 30% fat. The question I had was what would happen when the meat had a higher fat content and higher percent of the calories. That hasn't been addressed.
So as to your comparison to the oatmeal, when you say the steak would make a greater insulin response, I think fat would make a difference.
I know. My statement was in reference to results from the second study you posted and our ability to infer those results to our discussion. In their study they looked the effects of insulin release and hepatic uptake when certain macronutrients were combined with 50g of (glucose i think) CHO consumption. They found that fat didn't have much of an impact on insulin release (neither positive nor negative alteration).
Therefore, I'm not sure if a fattier cut of beef would result in a higher or lower insulin index. Though, it would definetly be worth looking into.
For one you say fat has no effect on insulin, than if that steak had 40% fat the amount of protein would be decreased and so the insulin response would be decreased correct?
That would make sense...
Also the idea that fat effects the insulin response I based off this:
So consuming fat with you meal should slow down gastric emptying which should help mitigate the insulin response correct?
Yes, that is true, and certain fats, depending on digestability have different impacts on gastric emptying.
For example, saturated fats slow gastic emptying most, and chain length will also effect emptying.
This is my understanding of glucagon is that one of the ways it is released, in addition to its release when blood sugar dips too low to bring it back up, is when protein rich food is consumed glucagon is also released which will raise blood sugar levels to allow for absorption of amino acids in the liver and their transformation there to glucose. If what I said is true than wouldnt the insulin and glucagon responses mitigate each other?
Yes, that is correct in the case of protein consumption. Amino acid consumption results in an insulin release, causing an uptake of glucose, which lowers the blood sugar without a direct source to increase bg. As a consquence, glucagon is release, and results in the uptake of AA by the liver, gluconeogenesis, and a resulting restoration of bg levels.
As I said in my previous post "If anything I would think this (The insulin index report) would support the fact that we don't need carbs in our diet really. If protein causes the insulin response needed to store the essential amino acids and also causes a glucagon response to keep the blood sugar stable, all while in the absence of carbs, then why do we need them?
I think this argument just further proves that carbs aren't essential or needed in our diet, especially in high amounts. "
I tend to agree. CHO are not essential for basic life functioning so long as fats are consumed for fuel AND attention is paid to consuming enough micronutrients in the correct ratios.
However, eliminating CHO from teh diet would be detrimental to someone looking for maximal performance who competes or trains using durations greater than 8 sec, or repeated >8 sec work with shorter w:r ratios (>1:10)
As for the second study I posted - Invalid Link Removed
You didn't answer and I am interested to see if I am reading it right. The way I see it is that protein may not be the cause of increased insulin levels by stimulating its release by the pancreas, but by decreasing the rate at which the liver removes insulin from the blood?
Yes, that is how I interpreted it as well.
Again you seem like this is the area of your career and I am just an joe schmo trying to decipher it all.
My specialization is in exercise physiology. Metabolism and biochemistry, as we are discussing right now is more of an academic hobby. The literature can be a bit confounding, especially because hormones and peptides do not act in the human body like a vaccum, but rather are multifaceted