What is the limit your digestive system can process in one day?

[Crusher_]

Obviously it will be different for everybody but there has to be a point when you consume so many calories your body cant process them so they pass straight through doesn't there..

So how many calories above "maintenance" is it likely your body will simply waste them?

[rgurleyjr]

What makes you think the body will dump calories after X amount? It will process everything you consume, while some will get lost from fiber intake like a small amount, you can't binge and expect most of the calories above maintenance to "disappear".

[lailalily]

What makes you think the body will dump calories after X amount? It will process everything you consume, while some will get lost from fiber intake like a small amount, you can't binge and expect most of the calories above maintenance to "disappear".

I agree

[Crusher_]

What makes you think the body will dump calories after X amount? It will process everything you consume, while some will get lost from fiber intake like a small amount, you can't binge and expect most of the calories above maintenance to "disappear".

Riiiiiight.... So if i were to drink 5 litres of olive oil in one day, roughly 42,000 calories subtract 3000 calories for maintenance leaving an excess of 39,000 calories my body will instantly covert that to 5kg's of stored body fat in one day will it?









No son.

[UCFBuilder]

I really dont think u would be able to consume 42,000 cals of anything in one day lol..maybe if u slowly work up to eating that much and become morbidly obese over time...but if just one day out of the blue u decide to do that..i dont think ur body would be able to handle it...u wouldnt process most of the cals cause you would be throwing it all up

now on a "normal" binge lol....id say your bodies ability to store all those cals as fat depends on how far from your BF set point you are and how long you drag out that binge...if u are coming off a show for example and are extremly lean..<5% BF...then yeah...your body is gonna take as much of those cals as it can and store it as muscle glycogen/water/fat...if you are already at your set point or above it....i would assume the amount of actual fat your body would put on would be less.

but what do i know...im just really going off shiit that ive read...even if u are at your set point and binge uncontrollably..u may still use as much of the cals above maintenance as it can and store it..again as muscle/muscle glycogen/water/fat

[Emma-Leigh]

You have to remember that digestion v's metabolism v's storage are VERY different things in the body...

And one doesn't necessarily reflect the others.

Digestion/ absorption of different foodss via the digestive tract is not a process that is the same for everything. No one can give a certain figure on it, and it is certainly not 'calories above maintenance' that determine whether or not your body 'can absorb' food in the digestive tract.

In fact - The average human digestive tract can absorb a STACK more calories than 'maintenance' over a given day. And even laxatives (which speed digestion) will not cause *that much* calorie loss. http://www.annals.org/content/99/1/14.abstract


How much any one individual can absorb during one sitting / day is a function of things including:
- macronutrient type
- fiber content
- digestibility of the food
- total load/ volume of the meal and the SPEED at which you eat the food
- your individual intestinal tract and secretary / expansion capacity
- the rate-limiting step in the path by which the nutrient is degraded/ absorbed (eg: does it require bile? Does it require pancreatic enzymes? What mucosal enzymes are involved?). etc etc

So - some macronutrients don't require as much processing in order for digestion/ absorption to occur.

Higher fiber = less absorption.

Certain foods have inherently higher digestibility's than others - thus, you'll be able to absorb some foods better than others when eating a stack of them.

A VERY high total calorie load can cause gastric dumping and malabsorption diarrhoea - which will speed transit and decrease calorie absorption.

BUT, on the other hand, a high calorie load will / can also delay gastric emptying - leading to a slower transit time, which will increase calorie uptake.

Basically - 'no one can say'.


A few things to read:
http://ajpregu.physiology.org/cgi/co...ull/275/1/R300
http://www.vivo.colostate.edu/hbooks...gut/index.html
http://www.ncbi.nlm.nih.gov/pubmed/14132344
http://advan.physiology.org/cgi/content/full/34/2/44
http://jn.nutrition.org/cgi/reprint/122/1/172.pdf
http://jp.physoc.org/content/498/Pt_2/553
http://ajpendo.physiology.org/cgi/co...ull/280/2/E340

[rgurleyjr]

I would think that the consumption of simple sugars has a very high absorption rate, so most of those should always count but I could be wrong. If you'd like to eat some high fat food's sometimes and reduce fat absorption, look into taking some Alli.

[Crusher_]

Basically - 'no one can say'.

Okay then.. How about "theoretically" what would be the maximum amount of body fat an "average" human being could possibly store in one day?

[Marius_Ursus]

Riiiiiight.... So if i were to drink 5 litres of olive oil in one day, roughly 42,000 calories subtract 3000 calories for maintenance leaving an excess of 39,000 calories my body will instantly covert that to 5kg's of stored body fat in one day will it?









No son.

Why not? Try it out and let us know what happens.

[Emma-Leigh]

Okay then.. How about "theoretically" what would be the maximum amount of body fat an "average" human being could possibly store in one day?

impossible to predict.
but - more than you believe.

[Crusher_]

Why not? Try it out and let us know what happens.

I was speaking theoretically dumbass.

impossible to predict.
but - more than you believe.

Give me an educated guess then...

[Emma-Leigh]

This article states that intestinal capacity for absorption of energy ranges from 0.66-0.94 kcal/ meter/ min.....
http://ajpregu.physiology.org/cgi/co.../275/1/R300/T3

There is also this article - that indicates a safety margin of ~ 220-300%.

And let's assume your gut absorbed everything. Looking at overfeeding studies >>>
Over 60 days, using the Guru Walla overfeeding protocol, eating about 6500 ish cal/ day, you can gain about 17kg [37-38#], 65-70% of which was fat. Which averages out to be ~ 280g weight/ day (half a pound).

And in another paper re glucose overfeeding - it can be seen that After glycogen reaches capacity eating only 475g carbs/ day will cause a storage of 150g fat/ day.

Then increasing carb intake further - This study showing fat synthesis during carb overfeeding showed that the body easily absorbed very high intakes from NG - and that intakes of 2.5 x energy expenditure can result in a total fat synthesis UP TO 2243 mg/kg/min after four days. Net weight gain - about 2kg [~ 4.5 #] over the 4 day study.... and to cut and paste:
.... After 4 d of high-carbohydrate feeding, net fat synthesis at the wholebody
level was “2250 mg - kg’ - d’ (ie, “170 g/d). Thus, adaptation to a hyperenergetic carbohydrate diet involved a substantial increase in de novo lipid biosynthetic activity.
However, at this time the liver produced ı40 mg fat - kg ı - d ‘ (ie, “ı3 g/d). Although this value was ı50-fold greater than the basal rate, hepatic de novo synthesis of fat only
accounted for 2% of whole-body fat synthesis after 4 d of hyperenergetic carbohydrate feeding. Most likely, the adipose tissue had adapted to the high carbohydrate load by synthesizing 167 g fat/d....

Lastly - this overfeeding study comparing fats and carbs at 50% over maintenance states that in carb overfeeding you can get 75-85% of excess consumed - stored. And Fat results in a 90-95% storage of the excess. So if you assume a maintenance of, say, 3000 cals....
+ 50% = 4500 cals
Assuming your glycogen stores were FULL.... If that extra 1500 cals came from carbs - you'd store ~ 1200 cals worth (about 130g worth of fat).
If that extra 1500 cals came from fat - you'd store ~ 150g worth of fat...


Thus: If you increased intake to match intestinal absorption capacity - you'd get fat quickly.

[gooseguy312]

Obviously it will be different for everybody but there has to be a point when you consume so many calories your body cant process them so they pass straight through doesn't there..

So how many calories above "maintenance" is it likely your body will simply waste them?

Ive actually experimented with this and its not much. I would have these buffets i go to where i ate abou 5k-6k calories (ya i know a lot) on every sunday. Well at 1st i wasnt gaining a pound from it, i would diet strictly 6/7 days of the week and i was actually leaning out for a little bit.

But my body starting adapting, it got better at storing the more of it as fat each time =(. Id say thats something a lot of people arent aware of that i found out in 1st hand experience.

I had to cut out the buffets because it eventually stalled my progress and now im doing great.

Honestly my guess would be your body cant add on more then 1/2 pound of fat per day, but its so subjective for each person and as emma said it depends on so many things that its impossible to really even know a ballpark figure without more details.


I mean people dont get fat in a day, or a week, its a long term thing kinda.

[Crusher_]

this overfeeding study comparing fats and carbs at 50% over maintenance[/url] states that in carb overfeeding you can get 75-85% of excess consumed - stored. And Fat results in a 90-95% storage of the excess. So if you assume a maintenance of, say, 3000 cals....
+ 50% = 4500 cals
Assuming your glycogen stores were FULL.... If that extra 1500 cals came from carbs - you'd store ~ 1200 cals worth (about 130g worth of fat).
If that extra 1500 cals came from fat - you'd store ~ 150g worth of fat...

Cheers, this paragraph answered my question and was pretty much what I had assumed..

Do you have a link to any research on the levels of glycogen stores muscles are cappable of?

[Emma-Leigh]

Cheers, this paragraph answered my question and was pretty much what I had assumed..

Do you have a link to any research on the levels of glycogen stores muscles are cappable of?

www.pubmed.com

you have fingers - use them.

[ncummings86]

Obviously it will be different for everybody but there has to be a point when you consume so many calories your body cant process them so they pass straight through doesn't there..

So how many calories above is it likely your body will simply waste them?

Your body will eventually start "reject" things that are in excess... like emma said, vomiting, diarrhea, so on. And things like carbs are absorbed more easily because our bodies are programed to survive. Carbs are easy to turn to fat, and fat is a good long term energy source. Long term energy means you can go longer without starving to death

Your body can handle a lot, but it kind of depends on the health of your digestive system on what it can absorb.

[AnabolicFyre]

Carbs are easy to turn to fat,.

Sorry but thats wrong bro, De novo lipogenesis doesn't happen that easily, it takes massive carb overfeeding for it to happen. Carbs indirectly make you fat when taken in excess because the body converts the dietary fat consumed to fat. Carbs themselves rarely get turned into fat.

Look it up mang, just sayin...

[ncummings86]

Sorry but thats wrong bro, De novo lipogenesis doesn't happen that easily, it takes massive carb overfeeding for it to happen. Carbs indirectly make you fat when taken in excess because the body converts the dietary fat consumed to fat. Carbs themselves rarely get turned into fat.

Look it up mang, just sayin...

Any excess carbs you take in and don't use as energy will be turned to fat. Carbs break down to sugars, sugars are the quick energy your body uses first, if not used they are stored as fat cells for use later. (Thats why you get fat when you eat too much sugar and carbs)

look it up man, just saying

[rgurleyjr]

Any excess carbs you take in and don't use as energy will be turned to fat. Carbs break down to sugars, sugars are the quick energy your body uses first, if not used they are stored as fat cells for use later. (Thats why you get fat when you eat too much sugar and carbs)

look it up man, just saying

You have absolutely no clue what your talking about, AnabolicFyre is right on the money. I can't believe people don't do some research before posting garbage.

[ncummings86]

You have absolutely no clue what your talking about, AnabolicFyre is right on the money. I can't believe people don't do some research before posting garbage.

http://www.diabeteshealth.com/read/2...makes-you-fat/

guess if you guys won't look it up and educate yourselves I will help you out.

[AnabolicFyre]

Any excess carbs you take in and don't use as energy will be turned to fat. Carbs break down to sugars, sugars are the quick energy your body uses first, if not used they are stored as fat cells for use later. (Thats why you get fat when you eat too much sugar and carbs)

look it up man, just saying

Bro you are wrong, look up de novo lipogenesis and read about it. Lyle has a bunch of articles talking specifically about this. It's a huge misconception that people have that the carbs are actually making you fat.

[AnabolicFyre]

http://www.diabeteshealth.com/read/2...makes-you-fat/

guess if you guys won't look it up and educate yourselves I will help you out.

That article has alot of flaws man, post up a scientific study to support the fact that ONLY carbs makes you fat. That guy may have a PHD but saying that ONLY carbs can make you fat, and fats cannot, makes him pretty dumb to me. Lyle uses scientific data to support his arguments, that guy is just regurgitating the same myth that almost everyone thinks to be true.
Another example that you shouldn't believe everything you read even if it's by someone with a PHD....

[ncummings86]

That article has alot of flaws man, post up a scientific study to support the fact that ONLY carbs makes you fat. That guy may have a PHD but saying that ONLY carbs can make you fat, and fats cannot, makes him pretty dumb to me. Lyle uses scientific data to support his arguments, that guy is just regurgitating the same myth that almost everyone thinks to be true.
Another example that you shouldn't believe everything you read even if it's by someone with a PHD....

I do disagree that ONLY carbs make you fat, but all I am trying to get through is that carbs do easily turn to fat. Come on guy, I don't believe things someone says just because they have a PHD. But I also don't believe anything I read that says it has scientific studies. For every scientific study that proves something, there is usually another one to prove it wrong.

I do know that when I consume a lot of carbs, I start to gain weight really fast. And its not a good kind of weight.

[Reloadguy]

I do know that when I consume a lot of carbs, I start to gain weight really fast.

It's water weight, the only way you gain any weight that's fat is if you're eating over your maintenance. Massive water retention is quite common after eating carbs when you've been on a low-carb diet for an extended period.

[ncummings86]

It's water weight, the only way you gain any weight that's fat is if you're eating over your maintenance. Massive water retention is quite common after eating carbs when you've been on a low-carb diet for an extended period.

I never said anything about being on a low-carb diet. And no, its not water weight.

[AnabolicFyre]

I do disagree that ONLY carbs make you fat, but all I am trying to get through is that carbs do easily turn to fat. Come on guy, I don't believe things someone says just because they have a PHD. But I also don't believe anything I read that says it has scientific studies. For every scientific study that proves something, there is usually another one to prove it wrong.

I do know that when I consume a lot of carbs, I start to gain weight really fast. And its not a good kind of weight.

So you admit the guy writing that article should stay away from talking about anything nutrition related?? Saying that only carbs can make you fat is enough for me to not want to listen to a word that guy has to say.
As far as gaining weight really fast when you up the carbs, that's because the dietary fat consumed is being shuttled even faster into fat cells because the body doesn't need it. It's not the actual carbs being converted into bodyfat.

[ncummings86]

Bro you are wrong, look up de novo lipogenesis and read about it. Lyle has a bunch of articles talking specifically about this. It's a huge misconception that people have that the carbs are actually making you fat.

http://www.ncbi.nlm.nih.gov/pubmed/10365981
http://scienceblog.com/community/old...200110712.html
http://www.ajcn.org/cgi/content/full/74/6/707

Apparently there are 3 sides to this, I found one study to confirm what I said, one to confirm what you said, and another that says it depends on the person how much de novo lipogenesis takes place. Done arguing with you, but I did actually learn a little more about the process of turning carbs to fat. Whether carbs turn into fat, or cause you to retain fat storage doesn't really matter I guess. Either way, I will just take it easy on the carbs.
Couldn't find the study you mentioned. Think you could post the link?


(Nothing in here mentioned anything about water weight Reloadguy)

[Wapadaigo]

Cheers, this paragraph answered my question and was pretty much what I had assumed..

Do you have a link to any research on the levels of glycogen stores muscles are cappable of?

Carbohydrate
For carbohydrate, the body’s stores are relatively close to the daily intake. A normal non-carb loaded person may store 300-400 grams of muscle glycogen, another 50 or so of liver glyogen and 10 or so in the bloodstream as free glucose. So let’s say 350-450 grams of carbohydrate as a rough average. On a relatively normal diet of 2700 calories, if a person eats the ‘recommended’ 60% carbs, that’s 400 grams. So about the amount that’s stored in the body already.

For this reason, the body is extremely good at modulating carbohydrate oxidation to carbohydrate intake. Eat more carbs and you burn more carbs (you also store more glycogen); eat less carbs and you burn less carbs (and glycogen levels drop). This occurs for a variety of reasons including changing insulin levels (fructose, for example, since it doesn’t raise insulin, doesn’t increase carbohydrate oxidation) and simple substrate availability. And, as it turns out, fat oxidation is basically inversely related to carbohydrate oxidation.

So when you eat more carbs, you burn more carbs and burn less fat; eat less carbs and you burn less carbs and burn more fat. And don’t jump to the immediate conclusion that lowcarb diets are therefore superior for fat loss because lowcarb diets are also higher in fat intake (generally speaking). You’re burning more fat, but you’re also eating more. But that’s a topic that I’ve not only addressed previously on the site but may look at in more detail in a future article with this piece as background.

http://www.bodyrecomposition.com/nut...oxidation.html

[rgurleyjr]

http://www.ncbi.nlm.nih.gov/pubmed/10365981
http://scienceblog.com/community/old...200110712.html
http://www.ajcn.org/cgi/content/full/74/6/707

Apparently there are 3 sides to this, I found one study to confirm what I said, one to confirm what you said, and another that says it depends on the person how much de novo lipogenesis takes place. Done arguing with you, but I did actually learn a little more about the process of turning carbs to fat. Whether carbs turn into fat, or cause you to retain fat storage doesn't really matter I guess. Either way, I will just take it easy on the carbs.
Couldn't find the study you mentioned. Think you could post the link?


(Nothing in here mentioned anything about water weight Reloadguy)

Put this in your pipe and smoke it.
http://www.ncbi.nlm.nih.gov/pubmed/6...?dopt=Abstract
Your an idiot if after reading all of this, you think cutting carbs will prevent fat gain. You belong in the Keto forum with your own kind.

[Crusher_]

Carbohydrate
For carbohydrate, the body’s stores are relatively close to the daily intake. A normal non-carb loaded person may store 300-400 grams of muscle glycogen, another 50 or so of liver glyogen and 10 or so in the bloodstream as free glucose. So let’s say 350-450 grams of carbohydrate as a rough average. On a relatively normal diet of 2700 calories, if a person eats the ‘recommended’ 60% carbs, that’s 400 grams. So about the amount that’s stored in the body already.

For this reason, the body is extremely good at modulating carbohydrate oxidation to carbohydrate intake. Eat more carbs and you burn more carbs (you also store more glycogen); eat less carbs and you burn less carbs (and glycogen levels drop). This occurs for a variety of reasons including changing insulin levels (fructose, for example, since it doesn’t raise insulin, doesn’t increase carbohydrate oxidation) and simple substrate availability. And, as it turns out, fat oxidation is basically inversely related to carbohydrate oxidation.

So when you eat more carbs, you burn more carbs and burn less fat; eat less carbs and you burn less carbs and burn more fat. And don’t jump to the immediate conclusion that lowcarb diets are therefore superior for fat loss because lowcarb diets are also higher in fat intake (generally speaking). You’re burning more fat, but you’re also eating more. But that’s a topic that I’ve not only addressed previously on the site but may look at in more detail in a future article with this piece as background.

http://www.bodyrecomposition.com/nut...oxidation.html

Good info there mate thanks for that, repped