Protein/Calorie Digestion

I did a search but found contradictory posts.

  1. How much protein can the body digest or use effectively at any one time?

  2. How many total calories can the body digest or use effectively at any one time?

  3. Would eating one big 3000+kcal meal a day be as beneficial as eating 5-6 smaller frequent meals throughout the day and if not why?..pros and cons ect

Any info would be greatly appreciated and if possible any studys or research papers based on any of these questions would be excellent as well.

Too many factors to come to a conclusion here:

Depends on type of protein, sources of calories, what is coingested with said sources, fiber and fat content, the amount of food that your body is conditioned to eat repeatedly, etc.

And why don’t you try out number 3 and come to your own conclusion on it?

How can anyone answer these questions without knowing the persons goals, lifting background, height, weight, bodyfat %, etc.

The fact that you want to see studies on such nonsense tells everything. Stop reading and figure shit out for yourself by finding out what works for your body at a given time in your life.

Cliff notes

You dont get it.

K let me rephrase a bit.

  1. Is there a limit to how much protein can be consumed and utilized by the body at any one time before any excess protein starts being turned into glycogen or fat for storage, is there a limit to how much amino acids are able to circulate in your blood stream?

  2. Is there a limit to how much glucose the body can absorb from a big meal of mixed food before it starts turning the glucose into fat for storage?

This isn’t for me to do myself, im just trying to understand human physiology a bit better.
I see tonnes of advice with bodybuilding that you need to keep eating protein every few hours so you dont go into a catoblic state and constantly feed your body yet ive seen no studies or proof of this and instead actually found evidence that your body only starts eating muscle after a whole day of fasting so im mega confused.

Re-read bones post and you will find that you rephrased questions are no better than you first.

So just stop reading everything and “figure shit out for myself”?
Well thats just great information right there, thanks alot for your help

.

[quote]lolwut wrote:
So just stop reading everything and “figure shit out for myself”?
Well thats just great information right there, thanks alot for your help

.[/quote]

No, but some people need to stop looking for research to support everything they do.

It’s usually more valuable to look to your own experiences and the experiences of others when it comes to this stuff.

All to often, people take research out of context anyway.

[quote]lolwut wrote:
actually found evidence that your body only starts eating muscle after a whole day of fasting so im mega confused.
[/quote]

So I guess that’s why we see all those pro BBers eating 1x per day right?

Wait, they don’t do that? WTF?

[quote]lolwut wrote:
I did a search but found contradictory posts.[/quote] well there’s your problem right there.

[quote]1. How much protein can the body digest or use effectively at any one time?[/quote] it doesn’t matter

[quote]2. How many total calories can the body digest or use effectively at any one time?[/quote]all of them - seriously all of the calories you eat are digested, unless you are pooping out cheeseburger happy meals whole

[quote]3. Would eating one big 3000+kcal meal a day be as beneficial as eating 5-6 smaller frequent meals throughout the day and if not why?..pros and cons ect[/quote] some would say so, others would not

That’s all I got.

[quote]lolwut wrote:
So just stop reading everything and “figure shit out for myself”?
Well thats just great information right there, thanks alot for your help

.[/quote]

Thanks for putting words in my mouth.

Because saying that we can’t answer your questions without knowing stats and experiences is the EXACT SAME as saying that you should figure shit out for yourself without reading anything.

I personally think that it’s all a matter of preference. From a bodybuilding perspective, the sheer volume of food required in many cases rules out low meal frequency.
Also, (although I may be inferring this wrongly) you seem to be thinking about this as if eating 3000kcals in one sitting means that amount will be instantly released into the bloodstream. This is not the case. There is going to be a slowing of gastric emptying up to a point, I’m not sure what that is, and presumably - like everything else - it depends on the individual.
The reason your questions are not answered is because you are looking at this from the wrong angle. Rather than asking what X value is for the “average” person or whatever, why not look at the principles involved, and then see how they apply when you use them yourself or on others.

[quote]-twiggy- wrote:
I personally think that it’s all a matter of preference. From a bodybuilding perspective, the sheer volume of food required in many cases rules out low meal frequency.

Also, (although I may be inferring this wrongly) you seem to be thinking about this as if eating 3000kcals in one sitting means that amount will be instantly released into the bloodstream. This is not the case. There is going to be a slowing of gastric emptying up to a point, I’m not sure what that is, and presumably - like everything else - it depends on the individual.

The reason your questions are not answered is because you are looking at this from the wrong angle. Rather than asking what X value is for the “average” person or whatever, why not look at the principles involved, and then see how they apply when you use them yourself or on others.
[/quote]

this is the best response so far. although the original post was pretty ridiculous, some of the other responses were even worse.

“How can anyone answer these questions without knowing the persons goals, lifting background, height, weight, bodyfat %, etc.”

on what planet does someones goals alter human physiology? It’s crazy how often this x amount of protein can be absorbed at once nonsense gets thrown around.

[quote]lolwut wrote:
I did a search but found contradictory posts.

  1. How much protein can the body digest or use effectively at any one time?

  2. How many total calories can the body digest or use effectively at any one time?

  3. Would eating one big 3000+kcal meal a day be as beneficial as eating 5-6 smaller frequent meals throughout the day and if not why?..pros and cons ect

Any info would be greatly appreciated and if possible any studys or research papers based on any of these questions would be excellent as well.

[/quote]

Bottom Line Up Front: Read more, shortcuts do not work in life or in weight training, PERIOD.

According to an article I read on TMUSCLE the other day (don’t remember the title, but it involved “protein”), After about 20g of egg protein there is a diminishing return in absorption. According to that article, studies on Whey and other types of protein have not yet been conducted.

If you plan on eating one 3000kcal meal per day, you are setting yourself up for failure. If you add any body-blitzing exercise to that diet you will fail, no matter what your goals… even if your goal is to simply understand physiology.

Take a look at any bodybuilding/weight training website (TMUSCLE is probably the best one), there are literally 1000s of articles that you can read that will explain this stuff to you.

I know what has worked for me, and that is at least 5 smaller meals per day with some shakes thrown into the ever-important peri-workout window. Mix of low and medium GI Carbs throughout the day total about 350g and about 200g protein all day (40g per meal). Fats, about 80g per day split between all meals.

[quote]rbm7733 wrote:

[quote]lolwut wrote:
I did a search but found contradictory posts.

  1. How much protein can the body digest or use effectively at any one time?

  2. How many total calories can the body digest or use effectively at any one time?

  3. Would eating one big 3000+kcal meal a day be as beneficial as eating 5-6 smaller frequent meals throughout the day and if not why?..pros and cons ect

Any info would be greatly appreciated and if possible any studys or research papers based on any of these questions would be excellent as well.

[/quote]

Bottom Line Up Front: Read more, shortcuts do not work in life or in weight training, PERIOD.

According to an article I read on TMUSCLE the other day (don’t remember the title, but it involved “protein”), After about 20g of egg protein there is a diminishing return in absorption. According to that article, studies on Whey and other types of protein have not yet been conducted.

If you plan on eating one 3000kcal meal per day, you are setting yourself up for failure. If you add any body-blitzing exercise to that diet you will fail, no matter what your goals… even if your goal is to simply understand physiology.

Take a look at any bodybuilding/weight training website (TMUSCLE is probably the best one), there are literally 1000s of articles that you can read that will explain this stuff to you.

I know what has worked for me, and that is at least 5 smaller meals per day with some shakes thrown into the ever-important peri-workout window. Mix of low and medium GI Carbs throughout the day total about 350g and about 200g protein all day (40g per meal). Fats, about 80g per day split between all meals.

[/quote]

again this is somewhat incorrect.

this is a quote from jga on the article youre referring to in the misinformation thread in gal which explains it pretty well.
"I’m sorry if I come off as sounding like a bit of a dick, but you (and a lot of other people who have read and tried to quote this article) really misunderstood what the article says. The article says that amounts above 20 grams of egg protein did not increase the rate of protein synthesis. This has absolutely nothing to do with digestion of the food you’ve consumed, or how much of what you consume is utilized, this just means that the rate, how quickly or slowly something is being used, will not be effected, not the overall consumption of raw material. You still need to provide the raw material for your body to produce new tissues, just because the rate of production isn’t increasing doesn’t mean that more protein can’t be consumed or wont be used, it just means that eating more wont increase the rate at which protein synthesis occurs. "

Why not look at this arguement from an evolutionary perspective. I don’t want to start some crazy paleocult diatribe here, as I feel such movements are foolish…However:
Food would not be abundant, there are various reflexes acting via the enteric nervous system (the stomach/intestines own nervous system that acts to some extent independently of the CNS etc) to regulate the release of food from the stomach. Certainly fat slows gastric emptying considerably, along with protein to some extent, and an increase in overall calories further slows the process.
This is just one aspect to be considered.
So now you have to ask:
is there an upper limit on the rate of gastric emptying (and GI motility in general?
is there a point where consumption of a certain number of calories exceeds the body’s ability to compensate through slowing these processes?
if so, where, and how much difference does it really make?

Now naturally this will vary from person to person, and without proper testing it is fairly pointless trying to guesstimate a ball-park figure. To my knowledge no such testing has been done (I haven’t really looked into it though!).
SO, there are now 2 lines of investigation to follow:

  1. find out about what I wrote above, and do a similar investigation into any other pertinent factors eg insulin sensitivity etc
  2. test YOUR tolerance to each way of eating. Eat a set meal plan for a month over 5 meals/day, then switch to exactly the same foods but over a 1-2 hours span. It’s not exactly rock solid evidence, but it is probably a useful starting point in making what is probably intellectual wanking into applicable knowledge…

Actually, thank you for squaring me away. I am guilty of misreading the article.