proteins and calories

[Cleavername]

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hm k, let me start off by just saying that i have been searching for the answer to this question on the internet for a bit, people seem to be split between 2 answers, so really, i can't find a good answer.

here is the question, does the proteins you eat becomes fat and get stored if you don't use it up?

i am sorry i am asking this on this awesome forum. but i trust you people and i know there are doctors/trainers/nutritionist lurking around from time to time. i just want some professional opinions on this.

 

[Algophiliac]

Yes, but proteins are the most difficult to convert back and forth from fat to energy--they are the most productive used in their own state and broken down into amino acids for muscle repair.

 

[cliffhuxtableDO]

the reason you are finding two answers is because there is no agreement. i've gotten both answers from two professors in the SAME department. a phd in nutrition said excess protein is converted to fat, a phd in exercis phys says all the excess protein is excreted. it just depends on the study you read.

 

[Algophiliac]

the reason you are finding two answers is because there is no agreement. i've gotten both answers from two professors in the SAME department. a phd in nutrition said excess protein is converted to fat, a phd in exercis phys says all the excess protein is excreted. it just depends on the study you read.

I was told a little of both happened...

 

[theWUbear]

proteins are first broken down into amino acids. Amino acids are either glucogenic or ketogenic. Those that are glucogenic are broken down into TCA cycle/glycolytic intermediates and can be used for gluconeogesis or TCA cycle -->oxidative phosphorylation. Ketogenic amino acids are broken into acetone.

An excess of TCA cycle intermediates can lead to a buildup of Acetyl-CoA, and the body will move to get rid of Acetyl-CoA, one way being fatty acid synthesis.

 

[theWUbear]

Correct me if I'm wrong, but this is how I understand it based on the med school biochemistry course I just took

Excess proteins themselves are *not* excreted. When they are broken down into amino acids, the amino acids are deaminated, and their carbon skeletons are what enter TCA cycle or are ketone bodies, as I mentioned earlier. The nitrogen atoms go into urea molecules. So excess protein intake would firstly lead to increased levels of plasma amino acids (which can be used to build muscle if a need is generated, ie going to the gym), or the amino acids will be broken down, leading to increased excretion of urea, and their carbon skeletons entering into TCA cycle, leading to a possible buildup of Acetyl-CoA which will be rerouted to fatty acid synthesis

 

[cliffhuxtableDO]

yeah, i agree with what you've shared.

 

[yellowcocopuffs]

Pls ignore the title of this reply. My mistake.
Anyhow, I agree with theWUbear. The N is removed from excess AAs resulting from breakdown and excreted via the urea cycle, and the carbon skeleton either turns into glucose or AcetylCoA, which is then converted into energy or turned into fat via malonyl coa+acylCoA pathway. You never "excrete" excess macronutrients in considerable amounts. Ever (unless you have some sort of disease).

 

[Cleavername]

Pls ignore the title of this reply. My mistake.
Anyhow, I agree with theWUbear. The N is removed from excess AAs resulting from breakdown and excreted via the urea cycle, and the carbon skeleton either turns into glucose or AcetylCoA, which is then converted into energy or turned into fat via malonyl coa+acylCoA pathway. You never "excrete" excess macronutrients in considerable amounts. Ever (unless you have some sort of disease).

wut i would do to be one of those "unfortunate" ones right now...

 

[yellowcocopuffs]

wut i would do to be one of those "unfortunate" ones right now...

huh??😕

 

[Cleavername]

huh??😕

i meant "wut i would do to be some one with those diseases" lol.

 

[yellowcocopuffs]

i meant "wut i would do to be some one with those diseases" lol.

Haha. Got it.
👍😀

 

[QuizzicalApe]

Correct me if I'm wrong, but this is how I understand it based on the med school biochemistry course I just took

Excess proteins themselves are *not* excreted. When they are broken down into amino acids, the amino acids are deaminated, and their carbon skeletons are what enter TCA cycle or are ketone bodies, as I mentioned earlier. The nitrogen atoms go into urea molecules. So excess protein intake would firstly lead to increased levels of plasma amino acids (which can be used to build muscle if a need is generated, ie going to the gym), or the amino acids will be broken down, leading to increased excretion of urea, and their carbon skeletons entering into TCA cycle, leading to a possible buildup of Acetyl-CoA which will be rerouted to fatty acid synthesis

yes

I don't really care how much steak you're eating. If you start dumping protein into a urinal like it's going out of style, you got problems.

 

[Cleavername]

Haha. Got it.
👍😀

dude, if the traditional ways of doing it are not working for me soon enough, ima seriousely consider appetite supressant. any opinon on the harmful side effects of those?

 

[Helen Wheels]

dude, if the traditional ways of doing it are not working for me soon enough, ima seriousely consider appetite supressant. any opinon on the harmful side effects of those?

I am overweight and I have done a lot of reading on the topic of weight loss drugs. No expert, of course, but it really seems to me that no OTC or Rx weight loss drug is very good. If you read the studies, people on the drugs only lose a modest amount of weight over the control group. I mean, the treatment group loses a few more pounds over a few months. There really is no magic pill for weight loss, sorry to say. It always comes back to old fashioned willpower and exercise. 🙁 If your BMI is high enough you could look into bariatric surgery but even with the surgeries, you are expected to follow a diet and to exercise.

 

[theWUbear]

dude, if the traditional ways of doing it are not working for me soon enough, ima seriousely consider appetite supressant. any opinon on the harmful side effects of those?

http://www.youtube.com/watch?v=T1g3ENYxg9k

 

[Cleavername]

I am overweight and I have done a lot of reading on the topic of weight loss drugs. No expert, of course, but it really seems to me that no OTC or Rx weight loss drug is very good. If you read the studies, people on the drugs only lose a modest amount of weight over the control group. I mean, the treatment group loses a few more pounds over a few months. There really is no magic pill for weight loss, sorry to say. It always comes back to old fashioned willpower and exercise. 🙁 If your BMI is high enough you could look into bariatric surgery but even with the surgeries, you are expected to follow a diet and to exercise.

my bmi ist to the point where i am obese, but i am almost there lol. i also weight lift when i was in high school, so i packed on some muscles, tho i doubt it means much. i just need to like trim 20 or so.

about those studies, were the experimental and control grps exercising the same amount? what were their eating habits? cuze i know eating through out the day versus all in 1 sitting is not the same, the former being 10x better since it increases ur metabolism through out the day.

 

[iamcool]

Well, yes. Proteins can be broken down into amino acids. Your body will get rid of NH3 group through urea and convert the carbon backbone to acetyl coa, which can be converted to fats. It is not a good source of eneregy because most amino acids are highly oxidized. However, excess intake of proteins will build up fat.

 

[Beets]

Since the latter part of this conversation appears to be getting really off topic, might I recommend the forums on 3 Fat Chicks to answer your weight loss questions? I'm not being a meanie. I relied on them heavily as a resource when I was getting into my weight loss groove. I've dropped over 200 lbs so far. Not necessarily just because of the forums there, but it certainly didn't hurt...

 

[Cleavername]

since the latter part of this conversation appears to be getting really off topic, might i recommend the forums on 3 fat chicks to answer your weight loss questions? I'm not being a meanie. I relied on them heavily as a resource when i was getting into my weight loss groove. I've dropped over 200 lbs so far. Not necessarily just because of the forums there, but it certainly didn't hurt...

dude, give me the god damn url naw.

 

[TropicalKitty]

1. Cleaver, being someone who works in a lab that specializes in urea cycle problems, no you don't want to be one of the unfortunates. It's pretty darn sad. Poor kids.

2. I'll give you some sympathy. (plus the name of the website was given to you 3 Fat Chicks - try Google for the URL. Also, try MyfitnessPal. I love MFP personally.) I've gone through a huge food revolution. Don't search for some stupid diet to solve your problems or a pill to make everything ok. There are a lot of reasons people are overweight. Look at what you eat. I lived off of eating out, now I'm gone the other way. I love organic local natural foods - as does my body. Anyway, after trying for years to follow the guidelines given by so many places (lean protein, whole grains, and veggies and fruits...fat is evil) I was crazy unsatisfied. I figured out what my body liked - which happened to be fatty protein. Give me a steak n broccoli and I'm happy as can be. Grilled chicken on a bed of lettuce? Hungry in an hour. Blah blah...listen to your body. If you want more info/support/etc PM me. I'd be glad to help you and give you some of the info that's gotten me through a lot of evil diet issues.