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How long does digestion take from mouth - to end?


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okay so just wondering - generally fruit and vegetables take 12-24 hours....red meat can take up to 72 hours....

but what i dont understand is how does this work with all the mixing in the colon? is the transit time for red meat faster if you are eating a lot of high fibre foods?

Edited Apr 18 2014 21:30 by coach_k
Reason: locked to prevent unnecessary zombie and/or spam bumps. Op last login was June 2011
13 Replies (last)

i thought it was closer to 6 hours for all food...but...

http://www.mayoclinic.com/health/digestive-sy stem/AN00896

Digestion time varies depending on the individual. For healthy adults, it's usually between 24 and 72 hours. After you eat, it takes about six to eight hours for food to pass through your stomach and small intestine. Food then enters your large intestine (colon) for further digestion and absorption of water. Elimination of undigested food residue through the large intestine usually begins after 24 hours. Complete elimination from the body may take several days.

The food you eat that goes down your esophagus is called a bolus.  It breaks down to chyme with the help of the acids in your stomach. It then passes through your intestines to the colon.  The first part of the colon, the sigmoid, is where a lot of nutrients are absorbed.  Water and other nutrients are absorbed all the way to the end until the waste is excreted.  To answer your question, I believe it takes more time because meat doesn't have the fiber to slow it down.  I'm not a doctor so I can't be 100% sure.  I'm relaying to you what I've learned in school (studying to work in health care).

#3  
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fibre speeds things up...doesn't slow them down...

Original Post by runner_88:

fibre speeds things up...doesn't slow them down...

Actually, fiber slows things down.  That is why fiber is recommended to eat to feel full for hours...because it takes a while to digest.

And I've heard that it takes about 8 hours for the whole digestion process to run its course.

Well fiber keeps things moving.  If I don't get fiber I get constipated.

Gastric emptying should take an average of 6 hours. "Gastric emptying" means all food has cleared your espohegus, stomach, gallbladder / bile ducts, and entered your bowel.

How long it stays in the bowel is another matter entirely, and that is where fiber and water consumption count. Things can stay in the bowel for days before moving :p

 

 

Original Post by mel_e_mel:

Gastric emptying should take an average of 6 hours. "Gastric emptying" means all food has cleared your espohegus, stomach, gallbladder / bile ducts, and entered your bowel.

How long it stays in the bowel is another matter entirely, and that is where fiber and water consumption count. Things can stay in the bowel for days before moving :p

 

 

 I haven't done much research on it, but ^ this is how I understood it to work as well.

#8  
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Digestion varies depending on what one eats!

To speed up digestion... simply incorporate Dr. Udo's Advance Digestive Enzymes or any top brand and it will facilitate you immensely! In addition, add Acidophilus... refrigerated along with FOS and you will have the model digestive system.

Try to eat tons of grainy foods, and fresh turkey.

Try to eat only two (2) meals a day not exceeding 1500 calories if you are an active female or 1800 calories if you are an active male. The body simply does NOT require tons of food. The more you train your body to exist on less food, the more your body becomes what it was designed to do... be the quintessential fighting machine in balance and HEALTHY. Too much food especially toxic foods make the body SICK!!!

Balance your food and STAY away from SUGAR! Sugar and too much protein are the killers in our society. EVERYTHING is LOADED with sugar! EVERYTHING! We need to begin to boycott all these manufactures and storm Capitol Hill and demand affordable low sugar content products. The two best sweeteners to use... if you MUST are Stevia, and Agave; light or dark it doesn't matter. With the dark one you use less. Use these sweeteners moderately to NOT induce insulin spikes. Insulin is a hormone just like estrogen, melatonin, testosterone etc... be careful.

Hope this helps!

Original Post by highonyoga:

Digestion varies depending on what one eats!

To speed up digestion... simply incorporate Dr. Udo's Advance Digestive Enzymes or any top brand and it will facilitate you immensely! In addition, add Acidophilus... refrigerated along with FOS and you will have the model digestive system.

Try to eat tons of grainy foods, and fresh turkey.

Try to eat only two (2) meals a day not exceeding 1500 calories if you are an active female or 1800 calories if you are an active male. The body simply does NOT require tons of food. The more you train your body to exist on less food, the more your body becomes what it was designed to do... be the quintessential fighting machine in balance and HEALTHY. Too much food especially toxic foods make the body SICK!!!

Balance your food and STAY away from SUGAR! Sugar and too much protein are the killers in our society. EVERYTHING is LOADED with sugar! EVERYTHING! We need to begin to boycott all these manufactures and storm Capitol Hill and demand affordable low sugar content products. The two best sweeteners to use... if you MUST are Stevia, and Agave; light or dark it doesn't matter. With the dark one you use less. Use these sweeteners moderately to NOT induce insulin spikes. Insulin is a hormone just like estrogen, melatonin, testosterone etc... be careful.

Hope this helps!

...are you sure your name isn't highoninsanity?Wink That rant right there is enough to trigger ED in normal people. "Train your body to eat less food?" Yeeesh. I like yoga and food moderation as much as the next lady, but you appear to be promoting food fears in a negative way.

Eating 2 massive meals a day is hell on your digestive system - 99% of medical authorities agree on this. That will cause a massive insulin spike, not "devil sugar." And sugar is a naturally occurring substance; eating it in moderation is not going to hurt anyone.  1500 calories a day will only be an appropriate intake for some one small - under 5'3" and around 115 lbs. it is a not a cure-all intake level. If it works for you, great. But it is not the way for everyone.

#10  
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Original Post by lalalacheesejah:

Original Post by runner_88:

fibre speeds things up...doesn't slow them down...

Actually, fiber slows things down.  That is why fiber is recommended to eat to feel full for hours...because it takes a while to digest.

And I've heard that it takes about 8 hours for the whole digestion process to run its course.

Actually your both partially right. Some fibers slow digestion, while others speed it up.

I'll quote my source:

Soluble fiber is a type of dietary fiber that is found in plants. It attracts to and dissolves in water, forming a gel-like substance during digestion. This process helps slow digestion, a key ingredient to making you feel fuller longer.

Insoluble fiber is also a dietary fiber, but unlike soluble fiber it doesn’t dissolve in water. It’s the fiber that adds bulk to your stool and speeds up the passage of food through your stomach and intestines.

 

#11  
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Original Post by highonyoga:

...

Hope this helps!

No, it is random diet-guru speak for a person whose circumstances you're not even bothering to find out.

It is, quite frankly, rubbish. Take your diet-religion elsewhere.

#12  
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Also OP, I can't think of any reasons beside ED-fuelled ones prompting this question. I hope I'm wrong.

...

Unless your alternative subject line for this post was, "Help! I've accidentally swallowed my house keys and need to know when I'm going to poop them out!"

#13  
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Original Post by mel_e_mel:

Original Post by highonyoga:

...

Try to eat only two (2) meals a day not exceeding 1500 calories if you are an active female or 1800 calories if you are an active male. ...

Eating 2 massive meals a day is hell on your digestive system - 99% of medical authorities agree on this. That will cause a massive insulin spike, not "devil sugar." And sugar is a naturally occurring substance; eating it in moderation is not going to hurt anyone.  1500 calories a day will only be an appropriate intake for some one small - under 5'3" and around 115 lbs. it is a not a cure-all intake level. If it works for you, great. But it is not the way for everyone.

Especially if the OP is still running as much as she used to. 750cals a meal isn't that big (I regularly put that away in one sitting), but 1500 total calories is too little for a dedicated runner.

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