9 types of protein reviewed

[MuscleMama]

Anytime, S.

[-TDS-]

Originally posted by MuscleMama
The BVs (bioavailability values, which is basically a fancy term for absorption rates) of the different types of protein, from highest to lowest, are as follows:

I'm not confident that's entirely true MuscleMama -- I don't think there is currently a standard scale for absorption rates (although I'm sure it correlates to other scales somewhat).

The best definition I've found of BV (and other scoring methods) is here:

Exposing Protein Myths

[MuscleMama]

TDS:

Actually, there is a BV chart for all the different types of proteins. These results (percentages of absorption and respective rates) are produced from research studies. The above list is just something that I produced from memory ... years of studying the stuff.

~ MuscleMama ~

[-TDS-]

No, that's not quite what I meant -- I've seen the BV chart for the various proteins. I was saying that BV is not necessarily the absorbtion rate of a protein, it's (according to the article link in my last post) a measure of the nitrogen retention...

[Steve]

Originally posted by -TDS-
BV is not necessarily the absorbtion rate of a protein

Is this true?

I, for one, would really like to see an ABSORBTION RATE chart....if it exists. I've never seen one, although I have been searching.

Steve

[-TDS-]

I'm pretty confident it doesn't exist, unfortunately... There's heaps of other scoring methods (best collection was in that article) but it appears less research has been done on absorbtion rates.

Aside from the whey vs. casein studies that stirred everything up, I haven't seen any standardized methods for establishing the AR for various proteins. Although, with everyone trying to market their "ultra-fast" or "time-release" formula or whatever, hopefully this will become a focus of research...

[MuscleMama]

Simple: Nitrogen retention and absorption rates are directly related.

~ MuscleMama ~

[-TDS-]

But I didn't say they weren't related, on the contrary:

Originally posted by -TDS-
I don't think there is currently a standard scale for absorption rates (although I'm sure it correlates to other scales somewhat).

But if you're saying that they're directly related to the point that BV=AR then the Casein vs. Whey studies wouldn't be a surprise to anyone. Some company would have already been touting "Egg Protein: The Ultimate Balanced Release" or "Rice Protein: 12 Hour Release" (who knows, maybe they are! ).

If we say nitrogen retention is the ultimate goal, then we'd look simply for the highest known BV -- we'd ignore everything except Whey Isolate, which as recent information shows, is not necessarily the ideal situation because absorbtion rate does matter...

[Shredded]

BV is one of the most commonly used and is arguably, the best measure of a protein's quality. BV is based on how much of the protein consumed is actually absorbed and utilized by the body. The higher the amount of protein (nitrogen) that is actually retained, the greater the BV.The BV rating isn't the absorption rate of a protein.

[Shredded]

Originally posted by MuscleMama
Simple: Nitrogen retention and absorption rates are directly related.

~ MuscleMama ~

BV helps us to understand which proteins are most efficient at depositing nitrogen into muscles not how fast they deposit nitrogen.

[MuscleMama]

TDS: Of course it's not the IDEAL situation - that would come from a combination of proteins (not just one type), as I've mentioned before.

Shredded: Everything you said is correct. Now combine what YOU said with what I said ... and you'll have the total concept of BV.

Get huge,
MuscleMama

[Shredded]

Originally posted by MuscleMama
TDS: Of course it's not the IDEAL situation - that would come from a combination of proteins (not just one type), as I've mentioned before.

Shredded: Everything you said is correct. Now combine what YOU said with what I said ... and you'll have the total concept of BV.

Get huge,
MuscleMama

So then why is egg considered a slow acting protein when it's got such a high BV?

[MuscleMama]

Shredded:

Ahhh ... NOW I see why you're confused!

OK, let me explain. ... You already stated a pretty good definition of BV. However, the "rate" part is what's getting you confused. For example, whey protein has a BV of 100 percent (it's actually MORE than 100 percent, but I won't get into that here), which means that 100 percent of the protein is absorbed by the body; egg proten has a BV of about 95 percent, which means that 95 percent of the protein is actually absorbed by the body. It's not really the "rate" at which the protein is absorbed; it's the actual AMOUNT of protein that gets absorbed, versus excreted.

Hope this helps.

Keep pumpin',
MuscleMama

[Shredded]

Originally posted by MuscleMama
Shredded:

Ahhh ... NOW I see why you're confused!

OK, let me explain. ... You already stated a pretty good definition of BV. However, the "rate" part is what's getting you confused. For example, whey protein has a BV of 100 percent (it's actually MORE than 100 percent, but I won't get into that here), which means that 100 percent of the protein is absorbed by the body; egg proten has a BV of about 95 percent, which means that 95 percent of the protein is actually absorbed by the body. It's not really the "rate" at which the protein is absorbed; it's the actual AMOUNT of protein that gets absorbed, versus excreted.

Hope this helps.

Keep pumpin',
MuscleMama

I thought what he meant by "absorption rate" was if it's a fast or slow releasing protein not what percentage of the protein is absorbed which of course is the BV rating

[-TDS-]

No you're right Shredded, that's what I meant by AR...

Frankly MuscleMama, I'm confused too, because here you say BV=AR:

Originally posted by MuscleMama
The BVs (bioavailability values, which is basically a fancy term for absorption rates) of the different types of protein, from highest to lowest, are as follows:

(I posted my contention with this...)

And then now you are saying don't confuse BV with AR:

Originally posted by MuscleMama
OK, let me explain. ... You already stated a pretty good definition of BV. However, the "rate" part is what's getting you confused. For example, whey protein has a BV of 100 percent (it's actually MORE than 100 percent, but I won't get into that here), which means that 100 percent of the protein is absorbed by the body; egg proten has a BV of about 95 percent, which means that 95 percent of the protein is actually absorbed by the body. It's not really the "rate" at which the protein is absorbed; it's the actual AMOUNT of protein that gets absorbed, versus excreted.

(I agree! This is what we were just debating!)