Protein absorption rates

Any queries about vegan diet, nutrition, dieting, bulking and healthy eating in general. Diets and food from vegan perspective.

Moderators: hardcore iv, fredrikw, JP, stateofflux, bronco

Protein absorption rates

Postby GenTDuke » Mon Jan 26, 2004 2:01 pm

Hi all, one of my training partners recentley quoted to me that soya protein is only 20% absorbed by the body, this is something I do not beleive to be true.

Does anyone of information on the absorbtion rates of vegi protein.
User avatar
GenTDuke
Active Member
 
Posts: 2154
Joined: Mon Jan 05, 2004 8:33 pm
Location: London / Essex

Re: Protein absorption rates

Postby xveganjx » Mon Jan 26, 2004 10:57 pm

[quote="GenTDuke"]Hi all, one of my training partners recentley quoted to me that soya protein is only 20% absorbed by the body, this is something I do not beleive to be true.

Does anyone of information on the absorbtion rates of vegi protein.



Unfortunatley it is true. But if you try fermented soy protien or rice protien the absorbtion rate is alot higher! Best of luck to ya! Live Vegan!
User avatar
xveganjx
New Member
 
Posts: 10
Joined: Wed Jan 21, 2004 1:37 am

tested numbers

Postby ctchrinthry » Tue Jan 27, 2004 1:04 am

Actually, I don't think that's correct.

http://www.solaeliving.com/performancen ... alance.jsp

http://www.soymeal.org/worldlitarticles ... s1996.html

Although it's incomplete, soy protein is better absorbed than meat protein according to sources i don't have access to right now.

dave
At this or that twist of it I feel my slippery self eluding me, gliding into deeper and darker waters than I care to probe.
User avatar
ctchrinthry
Active Member
 
Posts: 220
Joined: Mon Jan 05, 2004 5:56 pm
Location: Chicago

Postby xveganjx » Tue Jan 27, 2004 1:31 am

who cares about meat protien. Most people dont use "meat" protien powders. They use whey. whey protien is better absorbed than generic soy protien.
User avatar
xveganjx
New Member
 
Posts: 10
Joined: Wed Jan 21, 2004 1:37 am

Postby Renecarol25 » Tue Jan 27, 2004 1:34 am

whey is still an animal product. And one that I try to avoid.
Renee
User avatar
Renecarol25
Active Member
 
Posts: 1093
Joined: Sun Jan 04, 2004 6:15 pm
Location: North Carolina USA

the point

Postby ctchrinthry » Tue Jan 27, 2004 1:57 am

Is that the figure of 20% you posted does not seem to be accurate. Real research indicates that soy protien is better utililized that meat, which is useful when debating someone who is advocating meat eating for protien.

There's lots of info on the web about this, including our own robbie

http://www.veganbodybuilder.com/nutrition/facts.html

http://www.cbass.com/Soy.htm


dave
At this or that twist of it I feel my slippery self eluding me, gliding into deeper and darker waters than I care to probe.
User avatar
ctchrinthry
Active Member
 
Posts: 220
Joined: Mon Jan 05, 2004 5:56 pm
Location: Chicago

Re: Protein absorption rates

Postby dudeimhuge » Tue Jan 27, 2004 5:16 am

[quote="xveganjihadx"][quote="GenTDuke"]Hi all, one of my training partners recentley quoted to me that soya protein is only 20% absorbed by the body, this is something I do not beleive to be true.

Does anyone of information on the absorbtion rates of vegi protein.



Unfortunatley it is true. But if you try fermented soy protien or rice protien the absorbtion rate is alot higher! Best of luck to ya! Live Vegan!


i don't think rice protein is recommended as it is not a complete protein...i think :)

and on the soy protein thing, who cares. it's pretty much all we have or it is the most affordable to all of us so we're going to take it no matter what and it's a healthy protein source no matter how you look at it.
Corey Carlson
Dedicated to fitness since 2000.
User avatar
dudeimhuge
Active Member
 
Posts: 143
Joined: Thu Jan 08, 2004 2:57 pm
Location: Omaha, NE
Top

Postby JP » Tue Jan 27, 2004 8:32 am

[quote="xveganjihadx"]whey protien is better absorbed than generic soy protien.


What is "better absorbed"?

Whey and soya has the same full score in bio-availability scores PDCAAS (Protein Digestibility Corrected Amino Acid Score) (had to look that one up!). So as far as absorbtion in availability sense goes, they are both equal.

If you compare absorbtion rates (which i think GentDukes mate confused this about), whey absorbs faster - but often bodybuilders do not want that. Bodybuilders and other protein isolate users agree that wheys biggest problem is it's fast absorption rate, which is only handy in post workout shake.

[quote]
Although it's incomplete...


Soya protein is a complete protein - it has adequate amount of all essential amino acids for human use. Again, many anti-soya campaigners, or just people with older information, often quote that soya is lacking in one of the essential amino acids quoting studies made with rats. What they forget to mention though is that rats have different amino acid needs, especially growing fur requires more certain amino acids. So if you are a rat, soya is not a complete protein for you.

However if you are a human, you are ok :D

some useful links (though they are "biased" for soya, it's good to have these links because most soya vs whey links are equally biased for whey):

http://www.timinvermont.com/soyvswhy.htm
http://www.veganbodybuilder.com/nutriti ... swhey.html

good point from dude though, since we are vegan our choises are what they are and we need to choose best ones out of them, no matter how they fare to animal abuse products. But on the other hand it's good if we know the score when we face whey users in friendly neighborhood discussions...

About pea protein: is it so that pea as such certain amino acids are so low that it counts as incomplete protein, but then the actual pea protein isolate is a complete one? Don't know but thats what the pea protein manufacturers seem to say...
Strengthshop.de

Strengthshop Europe Facebook page in English

und in Deutsch
User avatar
JP
Site Admin
 
Posts: 19190
Joined: Sat Jan 03, 2004 4:14 pm
Location: Berlin, Germany
Top

Postby Pete » Sat Jan 31, 2004 10:32 pm

Joni took some of the words right out of my mouth there. Soya is complete. Whey is absorbed & utilised faster than soya, so you get it into you quicker, but you need to refuel more often. So, at night, for instance soya would be superior to whey as it would go in & be utilised over a longer period of time. Whey fans may counter by saying that as a post workout shake it gets into the body & is used more quickly (which is true), but to be honest I think the whole thing doesn't matter too much (well enough to argue for different sources of protein at times anyway).
It is true that the more protein you eat per sitting, the more gets oxidised, so the lower % is utilised (hmm, can't remember the papers I read to get that info, I'm sure a search of pubmed using "protein" would yeild results though), this varies according to indivdual metabolism, protein need (eg after exercise you would have increased need) & total calorific intake, so it's pretty hard to generalise.
I try to vary my protein, but that's just so I'm not too reliant on any one source (which could be unhealthy long term. I use SPI (soya), PPI (pea) & will be investing hemp concentrate (providing it's not too expensive) when it's available in the UK (from about April).
On a side note to what Joni said, the pea protein people do claim that by isolating pea protein it does make it a complete protein, but I've yet to see the research, which I'll have to ask them for at some point in the near future, I'll let you know when I get anything.
Pete
http://www.veganbodybuilding.org
[url=http://sports.groups.yahoo.com/group/veganbodybuilding/]Vegan Bodybuilding List[/url]
[url=http://veganbodybuilding.blogspot.com/]Vegan Bodybuilding Blog[/url]
[url=https://www.facebook.com/groups/23353662623/]Vegan Bodybuilding Facebook[/url]
User avatar
Pete
Active Member
 
Posts: 1594
Joined: Sat Jan 03, 2004 6:17 pm
Location: Brighton, UK


Return to Vegan Diets, Nutrition and Healthy Eating

Who is online

Users browsing this forum: Google [Bot] and 2 guests