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Old 04-18-2014, 02:41 PM   #1
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Does eating your daily protein Macro at once run the risk of dropping out of Ketosis?

With all the talk about watching your protein intake I been a little worried about eating over 140 grams of protein in one sitting.

The reason I would eat so much at once would be my intermittent fasting (Eating windows) I know 140 grams of protein is fine for me but does eating it all at once increase the change of protein being turned into glucose?
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Old 04-18-2014, 03:33 PM   #2
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Peter Attia wrote about that on his blog, I seem to remember him saying yes... He called it intermittent fasting intermittent ketosis (or maybe the other way around)

You should be able to find it pretty quickly if you do a google search so you don't have to rely on my memory

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Old 04-18-2014, 10:47 PM   #3
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I think I've read the same things on a different site, so I think it is very possible that all your protein in one sitting could cause problems. My brain is coming up with something like anything over 30g or so got converted but you should totally check that.

Depending on how big your eating window is, you could try to space it out over a few hours?

I'd also be a bit worried about eating all my carb allowance at once. It might be all leafy greens but it could potentially cause a blood sugar spike. You'd probably have to do some experimentation to find out.

I suppose you could just accept that you will eat at a deficit for that day and limit the duration of the fast? I suppose it depends on how you're doing it.
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Old 04-19-2014, 01:07 AM   #4
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I really think it's individual. IME, it depends on your protein needs, and your level of insulin resistance.

Based on my LBM, I aim for at least 120g of protein daily, and I occasionally eat more than that. I also naturally eat two meals a day probably 70% of the time. That means I sometimes have close to 100g of protein in one meal. According to blood ketone testing, that hasn't knocked me out of ketosis.

Though I don't eat more than 20g of carbs, I can actually eat more and stay in ketosis, so that may play a part in how much protein I can eat at once, while eating very low carb. I don't know for sure, but it makes sense to me.

I do know that some people have to be much more careful about their protein levels (meaning they cannot eat over their daily protein goals without risking ketosis), so I assume that for them, eating it all at once would be riskier.

It's one of those YMMV things.
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Old 04-19-2014, 10:06 AM   #5
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Originally Posted by Lesismore View Post
With all the talk about watching your protein intake I been a little worried about eating over 140 grams of protein in one sitting.

The reason I would eat so much at once would be my intermittent fasting (Eating windows) I know 140 grams of protein is fine for me but does eating it all at once increase the change of protein being turned into glucose?
If you are only eating once a day, it probably won't hurt you. You are a man, so men can get away with more than women can. A person can only absorb about 28 to 30 grams of protein at one time. The rest is excreted or sent to fat.
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Old 04-21-2014, 10:03 PM   #6
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If you are only eating once a day, it probably won't hurt you. You are a man, so men can get away with more than women can. A person can only absorb about 28 to 30 grams of protein at one time. The rest is excreted or sent to fat.
Carolyn
Well this would explain my fat. I def have been eating more than 30.

Reality check.
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Old 04-22-2014, 07:14 PM   #7
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Quote:
Originally Posted by Lesismore View Post
With all the talk about watching your protein intake I been a little worried about eating over 140 grams of protein in one sitting.

The reason I would eat so much at once would be my intermittent fasting (Eating windows) I know 140 grams of protein is fine for me but does eating it all at once increase the change of protein being turned into glucose?
I think this is really individual but it seems to me that consuming all protein allowance at one sitting would be more likely to become glucose. It seems that it is pushing an excess through the system at once and therefore causing some to be converted to glucose.

As always, this is highly individual and also can change. Beware of the 'moving target' by paying attention to how you feel.
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Old 04-25-2014, 09:28 AM   #8
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Quote:
Originally Posted by Lesismore View Post
With all the talk about watching your protein intake I been a little worried about eating over 140 grams of protein in one sitting.

The reason I would eat so much at once would be my intermittent fasting (Eating windows) I know 140 grams of protein is fine for me but does eating it all at once increase the change of protein being turned into glucose?
Also, you have to keep in mind that when you eat all of your protein at once, you may not absorb all of it. You will either pee it out or it will go to fat.
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Old 04-25-2014, 02:59 PM   #9
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I'd think to be on the safer side you should at least split it between two meals.
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Old 04-25-2014, 03:04 PM   #10
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I'd think to be on the safer side you should at least split it between two meals.
This is what I have been doing, most days I only have breakfast and late lunch. If I am hungry at dinner I eat then, but I am usually not.
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Old 04-25-2014, 03:14 PM   #11
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Yeah I usually just eat twice, with a cup of broth between the meals.

I was actually worried about sometimes going as high as 80 grams of protein in a single meal. Perhaps that's being too paranoid?
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Old 04-25-2014, 03:26 PM   #12
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Originally Posted by Geiri View Post
Yeah I usually just eat twice, with a cup of broth between the meals.

I was actually worried about sometimes going as high as 80 grams of protein in a single meal. Perhaps that's being too paranoid?
I don't actually know, but I would worry about getting that much at once too.
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Old 04-25-2014, 06:27 PM   #13
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Originally Posted by Geiri View Post
Yeah I usually just eat twice, with a cup of broth between the meals.

I was actually worried about sometimes going as high as 80 grams of protein in a single meal. Perhaps that's being too paranoid?
Like I said upthread, for me that doesn't seem to be too high, but I strongly suspect it has to do with the individual's protein needs to begin with.
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