Protein consumption/absorbtion question

[Corporate Thug]

So it's my understanding that protein in solid form is the best way to go as the body is provided with a consistent stream of protein as the stomach breaks the food down. But I'm wondering what, if anything, happens to the protein intake that comes in the form of a liquid?

Lets says I put a scoop of 30g whey in a muscle milk shake that has 20g of protein. Will the body eventually absorb all 50g? Is there a "limit" on the amount of protein the body can process/absorb when taken at once?

 

[vi edit]

If you are doing some form of a liquid/shake then from what I've read in several different souces is ~30g is about the most your body will really be able to use at a time.

So for me it's amost perfect to do just short of a scoop of whey for ~20g and then mix it up in 8oz of milk for another 8 putting me right under that 30g mark.

 

[SociallyChallenged]

If you are doing some form of a liquid/shake then from what I've read in several different souces is ~30g is about the most your body will really be able to use at a time.

So for me it's amost perfect to do just short of a scoop of whey for ~20g and then mix it up in 8oz of milk for another 8 putting me right under that 30g mark.

This is a load of bro-science. I'm not saying it's your fault, vi edit - it's sources like bodybuilding.com that make these absurd claims. Your body isn't stupid and is surprisingly adept at modifying things to make sure you maximize the absorption of food. This includes slowing the stomach's emptying rate, the motility of the small intestines, amounts of enzymes secreted, etc to maximize the breakdown and absorption of all nutrients, not just protein. If you take in 100g of protein, your body will slow your digestion and you will literally absorb all 100g of protein. The issue is now what to do with it? If you take in 100g, it will all be broken down into amino acids and from there will go to several sources: building proteins or other compounds to take care of the cells within the body or being broken down via gluconeogenesis for energy or to be stored as glycogen. This doesn't mean eating 100g of protein is better for your recovering muscles, as only so much will be directed toward muscle repair. If you're taking in appropriate amounts, which are actually much lower than what almost internet forums recommend, then you'll be fine.

 

[vi edit]

Like I said it's what I've read. I've read Men's heath for years and feel that they are fairly...moderate(? as in not extreme) in their tips and that's what they say. Other sources (from alleged PHd's) suggest similar and a buddy of mine who has a masters in kinesiology and is a personal trainer on the side has similar thoughts that match up to that. I guess that would be the definition of bro-science though

 

[mple]

http://www.youtube.com/watch?v=mjmV8BlsJTQ

 

[SociallyChallenged]

Like I said it's what I've read. I've read Men's heath for years and feel that they are fairly...moderate(? as in not extreme) in their tips and that's what they say. Other sources (from alleged PHd's) suggest similar and a buddy of mine who has a masters in kinesiology and is a personal trainer on the side has similar thoughts that match up to that. I guess that would be the definition of bro-science though

Don't get me started on Men's Health. They have so much convoluted info in their magazines. But to be honest, individuals outside of the nutrition and dietetics field are just as apt to spread incorrect info if they don't actively read research.

 

[vi edit]

Don't get me started on Men's Health. They have so much convoluted info in their magazines. But to be honest, individuals outside of the nutrition and dietetics field are just as apt to spread incorrect info if they don't actively read research.

Other fun part is that even professionals in the same field can wildly disagree based upon where they were trained/educated, when they were trained/educated, personal experience, and how much they keep on recent educational journals.

 

[SociallyChallenged]

Other fun part is that even professionals in the same field can wildly disagree based upon where they were trained/educated, when they were trained/educated, personal experience, and how much they keep on recent educational journals.

Yeah, I read a research paper that stated when something changes in the research (significantly and repeatedly), it takes something like 14 years for MDs to adopt it into their practice. Those who are on the cutting edge get it way sooner than others. It's the same with other practices as well, especially if they're lazy on reading current research.

 

[destey]

This guy addresses it in my links below. Good readings IMO. The main point I've found through research is as long as you keep each cell's RHEB phosphorylated (from mainly leucine, but if deficiency of others present itself, RHEB inactivates from mTOR), protein synthesis continues. Also seems to peak at 5 hrs PWO, so an immediate protein shake PWO doens't need to be huge, probably 20g with 4g BCAA (8:1 leucine to isoleucine/valine) would be sufficient to maintain RHEB until a larger meal is eaten later.

http://suppversity.blogspot.com/2012/10/2x40g-4x20g-or-8x10g-of-whey-which.html
http://suppversity.blogspot.com/2012/02/protein-synthesis-beyond-20g-limit.html
http://suppversity.blogspot.com/2012/04/20g-or-40g-of-protein-thats-wrong.html
http://suppversity.blogspot.com/2012/09/pre-workout-protein-supplementation-101.html

 

[ManBearPig]

Out of curiosity, what do you guys think a persons daily protein intake should be?