NY Muscle,
You have been doing it for a long time. Do you feel really good? Was it hard at first?
I am what they call "keto adapted" to a level most will never achieve.
On my carb up days I have about 800 g of carbs and I'm showing adequate blood ketones the next morning... typically that would take a person 3 to 5 days to get back into ketosis after all those carbs...it's more or less very good metabolic flexibilityMeaning?
There is a process called gluconeogenesis that will convert protien into glucose if you do not consume enough fat to burn as fuel. The proper ratio to produce ketones would be 65% fat 25% protien and 10% carbs. If you consume 50% fat 50% protien you might as well be eating carbs. U can cut the carbs out completley but atleast 75% of your calories would need to come from fat. The human body does not need carbs to survive and this is scientific fact not opinion.The problem with lowering any macronutrient too much is that you must raise the others to maintain enough calories. If you are eating a diet that is 33% carbs, 33% protein, and 33% fat and you cut the carbs to 0, you are now eating 50% protein and 50% fat.
Also interesting and something I just recently learned from my endocrinologist, who specializes in diabetes care, very low carbohydrate diets can cause insulin resistance.
Indeed and this is why I advise those who want to stop keto for whatever reason to ease into a moderate carb diet. Start off with PSMF-like macros, low fat and low carb then slowly up the carbs then fat again. Works very well.
That being said I cycle my carbs via CKD and always have, just works for me. I have achieved such a high level of metabolic flexibility that I can "carb up" on 800 gms (and very VERY low fat that day) and show decent blood ketones the next morning.
In the 90's it would take 3-4 days to restablish ketosis and show those same blood readings but now it is super easy.