Peg

Here is an article about whey vs. soy protein isolate.

Review for me your thoughts on the subject in your research and experience as bodybuilders.

I had to pause to think if whey is not a good source of protein for diabetic bodybuilders, though I think it can be.

I also know that a nutritionist I highly respect as ahead of her time did not like anything of cow's milk.

Is there an article somewhere on this site that pulls together and summarizes all important information for a newbie in terms of what a bodybuilder needs to supplement his protein in order to produce the most growth hormone and achieve the fastest absorption and shuttle of the protein to the muscle tissue after a work-out?

Thank you,
Peg

__________________
"21st century man is not conquered by guns, nor by oppression, but by seduction."

"Pride to the human heart is like lard to the pig." Aleksandr Solzhenitsyn

"The best punch is the one that is both first, last, and ends the fight."

LeanShredded

References to this article are 15-20 years out of date, with the most recent study in this article quoted as being in 1991.

Some of the points are valid, however it is too biased toward soy protein, which is essential for the vegan/vegetarian that may lack enough protein from other sources of their diet, but not suitable for bodybuilding.

However recent studies have shown that if Soy is not processed properly or at all then it actually works in detriment to a bodybuilder by blocking the absorbtion of nutrients into the body, this was found in a study conducted in 2005 (government funded).

Also it states that Whey Isolate cannot be purchased on its own, this is also untrue, you can buy bulk bags of isolate directly from many, many manufacturers which carry with them FDA certificates, it does of course tatse like cr*p, however these manufacturers will also sweeten AND flavour your purchase to any flavour you like and use a non-aspartame based sweetener to remove the bitter taste.

It states that isolate should only be used directly after a workout or when the body needs protein immediatley (after a period of catabolism i.e breakfast), this is a well known fact and most bodybuilders that have even a small degree of knowledge of basic nutrition should/do know this, which is why they would use a longer lasting protien chain at other times of the day i.e Pro-Peptide, Max Milk or any other micellar casien or casienate.

Plus, and more importantly, if a bodybuilder eats 6-8 meals a day only 2 -3 will be through protein shakes when the body needs protein instantly (as stated above this will be post workout or for breakfast when it is Isolate that is needed) the remaining meals will of course be solids, which are far superior to ANY protien shake if prepared properly.

So I'm sorry Soy protein is not and will not ever be a part of my contest prep, or off season diet and I doubt it has ever featured in Jay Cutler, Ronnie Colemans or any other serious competitors diet.

Leave it for the vegetarians!

__________________
Go Beyond What You Know.

Peg

Very nice post, Leanshredded.

Yes, the references were old.

It was the purpose to go back a bit and dig for facts and come forward from there to get all the facts.

Government studies can be biased as well.

More importantly for me is the knowledge that there is an alternative to whey isolate if whey is not tolerated by a person or cannot be used for whatever reason.

I am of the opinion that anything eaten can be detrimental to a bodybuilder if all nutrients are not present or there is an overabundance of one nutrient to another.

The human body seeks balance. Can whey isolate cause a depletion of something else important to th body that we aren't aware of because we have not designed a specific study on it, yet?

Who knows?

__________________
"21st century man is not conquered by guns, nor by oppression, but by seduction."

"Pride to the human heart is like lard to the pig." Aleksandr Solzhenitsyn

"The best punch is the one that is both first, last, and ends the fight."

rayvonn

soy protein isolate seems fine to me but goes verythick when mixed at high high strength, mixed up same amount of soy as i do whey first time i used and couldnt pour out the shaker

__________________
Just getting back into training, enjoying it and appreciate all the good advice
cheers:rolleye11

Clydefrog

Interesting article.

I've got a little bit to add. After just reading Pscarb's reply to a question of protein intake Vs. anti-catabolism (http://www.uk-muscle.co.uk/255062-post8.html), I recalled something I'd read of Mark Twight's...

(Read the full article at http://www.gymjones.com/knowledge.php?id=11)


OK, so his article is ultimately relating to nutirition intake during endurance sports, but I found it interesting what he write about Soy and fat metabolism.

Clydefrog

I bought some whole food soy beans today with the intention of experimenting with MRP shakes. I've found an online article about them, purtaining to answer, amongst other things, the anti-nutrient and phytoestrogens issues. Granted, this is taken from an organic food retailer, but after searching a little more online, I found more people advocating soy, albeit the correctly prepared whole food version.

http://www.edenfoods.com/issues_soyconfusion.html