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Pittsburg, Kansas | If a person is used to eating carbohydrates every few hours they likely get a rebound glycemic low if they go without food. This passes but it will make a person weak and hungry. I had these as a type II diabetic and took too much insulin for my level of food intake and/or physical activity. But a non-diabetic will also get a rebound low after insulin spikes high. They are just not in any danger of hypoglycemia like a person taking exogenous insulin is.
If a person is fat adapted and eats low carbohydrate meals they do not have the high insulin spike so they don't have the associated rebound low.
Fasting is a lot easier for someone who becomes fat adapted, and that can take a few weeks of lowering carbohydrates. Wife and I "cut down" on carbs for one week then went on a <20 gram after that with no ill effect. Never got the "keto flu" by doing it that way. That was a year ago Feb. 1
People who are thin and without much body fat likely do not need to do long fasts unless they have some specific autoimmune health concern they are trying to resolve. The ones that usually benefit from more fasting are the ones that have a lot of stored up groceries on their belly. Fasting lets them consume some of those stored up groceries. They don't go without food or energy. They are just utilizing stored up food energy in the form of body fat for their energy needs. It is the way the body is designed to work. Store excess energy when more food is consumed than immediately needed for times food is not consumed and the stored up energy takes over and supplies fat energy for body needs.
But if a person eats carbs many times a day, insulin never goes low, so body fat can not be accessed. To utilize body fat for energy insulin has to be low and glucagon elevated. Carby foods eaten raise insulin levels.
Dr Bikman explains the relavance of insulin and glucagon and associated diets in easily understood laymans terms.
https://www.youtube.com/watch?v=z3fO5aTD6JU
John
https://www.youtube.com/results?search_query=dr+benjamin+bikman Bikman: great source of information
Edited by John Burns 3/11/2020 11:29
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fasting, great way to pass out
