[quote]skohcl wrote:
Davinci.v2 wrote:
jk270 wrote:
Davinci.v2 wrote:
skohcl wrote:
xilinx wrote:
Thanks; just wanted to be sure, since it seemed a large amount.
What are your thoughts about using BCAA drinks + some carb during workout? or is CH that much faster absorbing still?
CH >>>>>> BCAAs by like alot.
…and what about free form amino acids? 
Yes CH is also quicker than FFAA, CT has stated this somewhere in these threads and someone else explained the science as well.
I’m not sure how that’s possible due to the fact that the amino acids themselves is what the CH eventually derives for utilization…if someone can prove me wrong then feel free.
FFAA have to be digested. CH is pre-digested and absorbed in the small intestine. So just accept that CH is the shizzle.
Edit: Ok so FFAA don’t have to be digested… but CH does get absorbed faster still, and is a more complete protein unless you have all the FFAA’s in their proper quantities. So sorry for the mis-info there.[/quote]
In a nutshell:
Actually, there are (at least) two diffrent mechanisms of amino acid absorption.
Firstly, there are actual amino acid transporters, which shuttle free form aminos into the blood stream. Protein digestion means breaking the long chains of amino acids into smaller pieces, i.e. single aa, di- and tri-peptides (which is hydrolization in vivo!). Every piece longer than that will pass the small intestine unabsorbed and will be metabolised further down the gastrointestinal tract by bacteria (which produces nice little molecules that make your farts stink…).
There are also peptite-tansporters in the mucosa of the small intestine. That is the second pathway of amino acid absorbtion (in peptide form).
So, if you measure, e.g., labeled glycine in the bloodstream after drinking a solution of free form glycine, you can measure a concentration of X after a given time.
If you drink a solution of di-peptides glycine-glycine, you’ll measure another concentration after the same time.
Now you can combine the two and consume both the free form and the di-peptide at the same time. The concentration you’ll measure after the same time as in the two experiments above will be higher than in both of the previous set-ups.
Probably, the “proteins” which lead to the highest amino acid concentrations in the blood after the shortest possible time are pre-digested (i.e. partially hydrolized) proteins. These contain free form amino acids, di- as well as tri-peptides.
Why phCY (partially hydrolized Casein) is “faster” than say phWy (partially hydrolized Whey) is not entirely clear.
Probalby, some di- and tri-peptides are absorbed faster into the blood stream than others. Some combinations of amino acids in di- and tri-peptides may not be absorbed at all (with 20 amino acids, there are 400 diffrent di-peptides). Not all combinations have been used in studies.
Maybe phCY contains a favorable combination of peptides (good aa-combinations that can be shuttled). Further studies on the exact profile of phCY are necessary to answer this question.
Make no mistake, COMPLETELY predigested casein (i.e. all amino acids are available in free form) does not lead to faster absorption (in terms of concentration of labeled amino acids in the blood stream than an amino acid solution with the same profile.