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Originally Posted by Sundove
My internist told me that ketogenic diets have their effect by how the ketones act on our brain, suppressing our appetites and allowing us to tolerate very low calories. The actual fat-burning happens with any reduced calorie diet. As to whether IP spares muscle mass, the diet has not been scientifically tested, so all we have is their website, which is for-profit so by definition not scientific. And anecdotal testimony from others. While it might all be correct, it's important to exercise caution when generalizing someone's own experience or IP, Inc.'s claims to any individual. A case in point is that IP claims to "reset" the pancreas--not validated by empirical evidence anywhere. Dr. Chan may have an MD but it doesn't mean he is publishing scientific fact. just my 2 cents, and I should say I love IP!
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I don't agree with your internist.
A keto diet changes the body from being a sugar burner to a fat burner.
Sugar burners struggle with hunger because the body can't store sugar sources. It stores sugar as fat. So they always need to go to external sources for fuel.
A fat burner on the other hand can readily access fat stores. There is not the same desperate hunger because the body -- once keto-adapted -- has the utility to access fat stores.
Hunger is annihilated not because the brain is fooled by ketones but because the body is assured of an accessible fuel source: body fat stores.
A body producing ketones is a sign that fat burning is happening.
Once one becomes more keto-adapted, ketone readings might go down only because the body becomes more efficient at using them for fuel, too.
I found in other reading that they are thought to suppress appetite. There sure is a lot of research being conducted on this topic. 