When fasting, when does your body begin ketoisis?

Depends on what you ate before.

Why exactly do you want to "avoid ketosis"? And what are your goals in fasting?

Your liver makes ketones even if you aren't doing things like prolonged fasting or following a fast-mimmicking diet.

If you are breaking your normal overnight fasts with sugar or high protein then that process slows to a halt and you continue burning glucose and storing glycogen.

If you continue a fast and/or eat high-fat, low-carb, moderate protein (and the ratios vary by individual of course), then your liver will keep making ketones and your body will adapt to that fuel source.

Beta-hydroxybutyrate is an incredible energy source and doesn't require insulin to get to your mitochondria. It has been proven to defeat harmful inflammasomes.

I understand people being afraid of fat (as irrational as that may be), but I don't understand a blanket aversion to using ketones as fuel (as in, even if you aren't actively trying to get "into ketosis," why would you actively desire to avoid it as a side effect of fasting?).

Would like to utilize fasting (OMAD) to maximize autophagy and increase health, including the liver and kidneys ability to flush uric acid and other toxins.

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I'm not pushing keto on you

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by McLemore

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Lol

The uric acide rise has been shown to completely dissipate once keto adapted--2-3 weeks.

But if you don't want to go through that process, while still on OMAD, I guess you'll have to self-experiment with what ketone level (you're going to produce some ketones on OMAD, especially if you move at all) causes a uric acid rise to the gouty level.

I've never had this issue, so I have no n=1 in this regard.

ETA: also if you want to do OMAD and actually get over the uric acid hump, then you could temporarily use allopurinol. It's hard to find a doctor who cares and knows enough about nutrition to help you formulate all this.


Dr Phinney is an MD/PhD who focuses a lot on the adaptation phase.
Good read/listen, and this was 7 years ago. I'm sure he's refined and developee this further:
Phinney on Gout and uric acid

Excerpt from intro:

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   As an overview, most medical professionals consider higher uric acid levels to be a sign of danger, and that’s one reason that many warn that a low carb, high-fat diet is a bad idea–because at least at first, transitioning to a high-fat, low-carb diet raises uric acid levels in the blood.  But as you’ll see in this discussion, Steve Phinney, who’s an expert on long-term adaptation to high fat diets, can demonstrate that a short-term rise of uric acid is not hazardous for most people, and if someone stays on a low carb diet over time, uric acid levels go down.  Currently, it’s also commonplace among medical professionals to say that ketones are bad for health.  Ketones are are a type of fat produced when the body is burning lots of fat, and when the body creates ketones, it’s often possible to detect them through urine or blood tests.  Many health professionals assume that detectable ketone levels are always a warning sign of ketoacidosis, but that’s not true.  Ketoacidosis IS dangerous, but it generally only happens when blood sugar levels are high at the same time ketones are going very high.  When blood sugar levels are normal, many experts on low-carb diets report that the presence of ketone bodies in the blood or urine can be an indication that a body is “keto-adapted.”  That is, a keto-adapted person’s body may be in a very healthy state that involves burning fats for fuel.  It’s worth noting that many conventional health experts still disagree with this opinion.

So, who’s right?  And what’s the right thing to do for health?  That’s what these two scientists will discuss.  

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And to Mingo--i am in no way pushing a ketogenic diet. I'm addressing the inevitable ketone production in an OMAD diet (with any physical activity).

You will not enter ketosis as long as you keep your glycogen stores full. Once glycogen stores are depleted gluconeogenesis takes over to provide the body with energy.

GOUT - Water is your friend, drink it, a lot.

“including the liver and kidneys ability to flush uric acid and other toxins.”

Here is a product that is great and works (no affiliation with the company)
LINK

I think it is imperative to keep liver glycogen full if you are training and hovering on the edge of ketosis. Apart from the health benefits, you will lose that shitty feeling you are talking about on prolonged ketogenic diets. Best way to make sure your liver glycogen is regulating is post workout fructose. I am assuming your OMAD is post workout???? you could afford some starchy carbs as well and could take Berberine or Metformin 500 to make better use of those PWO carbs.

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(good) carbs

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What does this mean?

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Would like to utilize fasting (OMAD) to maximize autophagy and increase health, including the liver and kidneys ability to flush uric acid and other toxins.

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If these are truly your goals, you need to be in ketosis to make it happen. Sorry, but for these goals you are just wasting g your time and the fast otherwise. Also need to think long and hard about trying to extend the fast to 72 hours twice weekly.

If gout is your worry, look up snake juice kidney shots. Take it 2-3 times if doing omad. Also time of water to flush the toxins out.