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Old 08-16-2005, 04:31 AM   #1
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Question lets get this straight about the whey protein.

does whey protein contain casein or lactose in any form???????


alex.

 
Old 08-16-2005, 06:21 AM   #2
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Re: lets get this straight about the whey protein.

Many Whey protein supplements do contain some casein and lactose. Check the ingrediant lists.

 
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Old 08-16-2005, 06:40 AM   #3
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Re: lets get this straight about the whey protein.

ratboy,
Any chemical separation is never 100% and since whey, lactose and casein are components of milk there will be some small amount that gets through. Getting 100% pure ANYTHING cost a great deal of money.

Whey is a liquid left over from cheese manufacture after the lactose is converted to lactic acid and the casein coagulates. It contains around 1% protein, lactose, lactic acid and a small amount of casein and LOTS of water. It's dried and chemically processed to remove as much of what isn't whey protein as possible.

That's why the many products are called "90% PURE WHEY PROTEIN" or "95% PURE PROTEIN POWDER."

Last edited by Lenin; 08-16-2005 at 06:42 AM.

 
Old 08-16-2005, 06:45 AM   #4
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Re: lets get this straight about the whey protein.

Whey and casein are two different proteins that come from dairy. Some whey blends have a mixture of whey, casein, soy, and/or egg protein, but *most* products called "whey protein" (concentrates and isolates) will contain only whey. There is usually a small amount of lactose in whey, but some formulas have removed it entirely.
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Last edited by Naxis; 08-16-2005 at 06:46 AM.

 
Old 08-16-2005, 09:13 AM   #5
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Re: lets get this straight about the whey protein.

that sounds good to me. i tend to experience some of the symtpoms of lactose intolerance but only when i drink alot of milk; i don't when i only drink a samll amount of milk i.e. the amount used in a cup of tea, so i guess the small amount of lactose left in the whey protein will probably be okay for me. as for the casein, i'm pleased about that too as i've heard a lot of bad press about the stuff.

just another question. what is the percentage useability of whey protein? i've read that eggs have a useability of 93%. how does whey compare to this?


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Old 08-16-2005, 09:28 AM   #6
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Re: lets get this straight about the whey protein.

It depends on which stats you're looking at. Different sources will give you different numbers. Going by BV (biological value), whey is rated higher than whole egg usually. Egg is somewhere between 93 and 100, whey is rated around 104 or higher.
And for the record, casein isn't inherently bad. It has its place as a slower digesting protein which is more conducive for use at night. It has a lower BV (closer to that of chicken), but is less likely to result in gluconeogenesis (protein used to create glucose) or fat storage.
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Last edited by Naxis; 08-16-2005 at 09:30 AM.

 
Old 08-18-2005, 06:15 AM   #7
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Question Re: lets get this straight about the whey protein.

i'm a little confused. how can something have a percentage useability or BV higher than 100? i thought 100 was the max?

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Old 08-18-2005, 07:45 AM   #8
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Re: lets get this straight about the whey protein.

BV isn't by percentage exactly. It's a rating. Egg used to be the "perfect" protein and it seems the original rating system was based off of that as a benchmark with egg traditionally at the 100 spot (not necessarily as a percentage, but as a rating). The amount is determined by calculating the nitrogen used for tissue formation divided by the nitrogen absorbed from food. This is then multiplied by 100 and expressed as a percentage of nitrogen utilized. Since the base level of utilization is the whole egg which schores at 100, all other proteins are compared to that and given a BV of either greater or less than 100 depending on how they are utilized by the body as compared to the whole egg protein.
Make more sense?
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Old 08-19-2005, 03:31 PM   #9
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Re: lets get this straight about the whey protein.

okay, so i take it the whey is good **** then! on offer for £11.99 for 910grams. i may well get some!

alex.

 
Old 08-22-2005, 10:02 PM   #10
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Re: lets get this straight about the whey protein.

Look at isopure if you're looking for a good whey powder

 
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