I read somewhere recently that in a fast once we go into ketosis, our previously emptied glycogen stores get refilled through the process. The information was extremely limited, so i was curious if that was even true, if so do both the liver and the muscles get refilled? And if it is true, while we remain fasting and in ketosis, does this glycogen remain untouched, or does it continually get used and refilled? Thank you :).
Thank you once again Chris :),
Four additional questions were triggered here :).
My Q 3. "While we remain fasting and in ketosis, does this glycogen remain untouched, or does it continually get used and refilled"?
Your Q3 Answer: "yes again....replenished minimally."
I am confused as to what you are saying yes to... that the glycogen remains untouched or that it continually gets used and refilled. But the part where you say "replenished minimally" seems to imply that you are saying it remains mostly untouched, is used minimally and replenished to the full level soon after this happens?
What might be an example of when the body (in ketosis) would choose to use this glycogen instead of continuing to use the fat (primarily) and protein (secondarily) for fuel? Cardio above a certain level? Heavy Lifting?
What is the process by which ketosis is able to refill glycogen stores?
Adipose tissue which stores fat, is adipose tissue, itself, "protein"?... and is all tissue protein?
Thanks again, Mighty.
Hi Chris, another follow up
,
Q. "What is the process by which ketosis is able to refill glycogen stores"?
A. GLUCONEOGENESIS........
"(So it accesses glucose from two sources. It first converts glycerol, available in the body's fat stores, to glucose but this is still insufficient. So it makes the rest that it needs from catabolizing, or breaking down, the amino acids in muscle tissue, using them in the liver for gluconeogenesis, or the making of glucose. Between 60 and 84 grams of protein are used on this second day, 2-3 ounces of muscle tissue)"
Hmm interesting. I was aware of that process, but not that the glycogen stores were refilled through it. So while in ketosis, it is actually the breaking down of the muscles (gluconeogenesis) and not of the fat (via the glycerol) that refills the glycogen? I was under the impression (aparently wrongfully) that the muscle breakdown served only to directly provide glucose to the brain, and only the amount that could not be provided by the glycerol.
"Adipose tissue is basically.......Any more info' and I shall have to look this up from my arsenal of nutrition books, but will be glad to do so if you wish."
Very kind of you but it is was merely a whimsical curiousity and is not very important to me at this point :).
Thank you yet again Chrisb1!
haha, i thank you chris for your persistence with me
.
I actually already know all of this information, having at one point been very curious about it and believing it to be essential information for the faster who likes to know what's going on within... the one specific thing i am still curious about is the refilling of the glycogen stores, if that in ketosis comes from protein or from fat... or are you saying it comes from both? When you said it came from gluconeogenesis, i took that to mean that it came specifically from the breakdown of protein.