I wish, TFG…
Have to get the stomach and small intestine emptied out, then a while goes by - the ‘post-absorptive phase’ - and then glycogen gets depleted. After that is when autophagy can be really ramping up. If it’s before 24 hours, cool, and maybe toward the end of the first day we’re getting some increase, especially coming from a keto diet where glycogen should already be low.
From the website you linked to:
“To know whether or not you’re more anabolic or catabolic or more mTOR or AMPK activated, you can measure your insulin to glucagon ratio.”
There will be such variability there that as stated it’s wrong. We know that having been eating ketogenically or not makes an enormous difference there - as in the excellent video (on Youtube among other places) - Dr. Benjamin Bikman - ‘Insulin vs. Glucagon: The relevance of dietary protein’
The response to eating protein is vastly different, coming from either a high-carb or very low-carb context. There was a 70 to 1 difference in the changing of that insulin/glucagon ration between the two groups, after eating protein. Thus, one could be still profoundly anabolic, eating ketogenically and just plain eating, period - and think one had more autophagy going on than a carb-burner who had fasted for a day.
The site is right about mTOR and AMPK signaling, but just plugging in the insulin/glucagon ratio will be useless. At the least, it would need to be calibrated for a keto diet or not, and for the individual - one’s degree of insulin resistance will affect the ratio.
Overall, the insulin/glucagon ratio gets more favorable for autophagy through at least 4 to 6 days of fasting, for both keto eaters and otherwise. mTOR and AMPK are nutrient sensors, and it is the lack of protein and carbohydrates that they’re mostly concerned with. Fat, especially a little bit, isn’t going to do much.