Excess Protein: Excreted or Stored?

I'm confused about something. I read somewhere that protein consumed in excess of what the body can use is excreted in urine and therefore is not converted to bodyfat. But how can that be? I would think that if you ingest 80 grams of protein in one sitting, and your body simply cant utilize all of it, that it would store some of it as body fat (by converting it to glucose and then storing it as fatty acids). So which is it? Anybody know?

Good question.

Let me ask a doctor friend of mine and see what he says.

The interesting is that I seem to remember being told both. I do remember that the person that told me it was stored as adipose tissue was a doctor.

it gets converted into fat.

Your body can only absorb 8-10 grams a protein an hour anymore can hurt your kidneys.
Just remember to drink lots of water to wash out excess protein.

i drink 50grams of powder post workout everyday, all day. +5g creapure, i think it avg out to be close to 30g protein. and i also supplement 2-3 protein drinks thru out my day, usually 30g each time.

so does that mean i am putting on fat n killing my kidney? i only mix it with water, 8 - 12 oz depends on how much powder.

cause im trying to lose fat, n i do drink liquar.

this topic really interests me so i googled it real fast and this

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http://en.wikipedia.org/wiki/Protein_in_nutrition

thru the whole reading it does not say excess protein are converted to fat, n it says the amount of protein a person need depends on what that person do.

i have and am doing the same thing clip does- i do however know one thing, too much protein does bring one undisarable affect

imo excess anything could lead to stored energy..fat. if u could eat more lettuce than ur body cud use it wud be stored imo

Yep, I get that--if you eat too many calories, the extra calories get stored as fat. But what I'm asking is, what if you don't eat too many calories. Let's say you eat exactly the same number of calories that you burn, BUT you eat, let's say for one of your meals, a bolus of protein, like a huge amount, say 100 grams. Obviously you only need so many aminos for growth, repair, glucogenesis, etc. So are the excess aminos are stored or excreted? I've read a lot of nutrion papers that say the extra aminos cannot be stored and that they are broken down into waste products (urea) and excreted through the liver and kidneys. (Which is why some people think eating a lot of protein is hard on the kidneys). Just trying to understand what happens to aminos that can't be used by the body . . .

I would disagree with mancini about the 10 grams at once statement. I have never seen anything (research wise) about how much protein the body can absorb at once. I have also never seen any research about kidney damage and protein intake. I have seen research and also believe that the body does not like to store amino acids as bodyfat. It prefers fat and carbs to store as bodyfat.

We know that calories equal weight gain. We know that consuming calories from FAT will equate to bodyfat gains.

We know that consuming calories from protein will equate to lean muscle gains.

I can also theorize that if I took 20 people and made them consume 5,000 calories per day. 10 of the people all of the calories come from fat and carbs and the other 10 people all the calories come from protein. I can bet the farm that the people who ate protein only will look alot better than the people that ate the carbs and fat.

So to answer fit42 ?...what happens to excess protein? It all depends on your current state. If your pumping iron hard your body is looking for repair and recovery of muscle tissue. and amino acids especially BCAA's will help the body repair and then build up...(ie grow muscle). So intake of protein (nitrogen) will aid the body in doing this and protein will not be wasted. But if your a couch potato and you decide to have a 16 oz steak at the old homestead in NYC washed down with a big glass of milk, then walking home decide to chug one of those muscle milks and have a big 100 met rx bar for desert....yea your body might just store the amino acids as fat.....

Ie if your gonna drink protein supplements you should be working out

Also how much at once.

Lets say your consuming 30 grams of protein every 3 hours and NOT gaining weight. This means two things. #1 your body is sufficiently using the protein for repair and to maintain. and #2 its not storing any as bodyfat. But you WANT to gain muscle so you NEED to increase your protein intake. Therefore I recommend doubling your protein intake. 60 grams at once...why not? I tell my customers to try it for a week and see what happens. Most people get back to me telling me that they gained weight.

But to be realistic, this gets old after a while. consuming large amounts of protein everyday is tough...after a while you want to vomit thinking about drinking massive amounts of protein. I personally try to stick with quality proteins....like super plasma about 30 grams a day...peptopro, whole egg...ultra 97...I also mix up my protein sources