T Nation

Protein Quality from Different Sources?

Does 1 gram of Protein from any source do the same for your body?

Is 50 grams of Protein from Reeses Peanut Butter Cups going to do the same thing for you as 50 grams of Protein from chicken or milk?

I understand that overall, the candy would be much worse for you, but if your only goal was to receive 50 grams of Protein to use for building/repairing muscle?

What about Protein from high-quality sources like milk and meat? Is 50 grams of chicken Protein as good as 50 grams of beef Protein? What about 50 grams of cottage cheese Protein?

All protein is not created equal. Each source of protein has a different amino acid sequence profile. That goes to say that eggs will be higher in certain amino acids than beef and vice versa. Since we all eat protein, essentially for the amino acids in which they contain, this becomes important. However, if your ingesting your protein from complete protein sources like dairy, eggs, beef, poultry, and fish your receiving a wide range of all the amino acids you need. Eating a majority of your protein from incomplete sources like plant based proteins (veggies, grains, and legumes) could leave your diet lacking of certain amino acids.

Peanut butter is an incomplete Protein? I eat that sometimes to get in extra calories. Most come from the fat though.

reese cups contain protein !?

Proteins have different biological values. Off the top of my head (so I could be wrong), I believe that the highest is whey followed by whole egg, egg white, milk, chicken, beef.

Yep, peanuts are incomplete sources. They taste good though :wink:

[quote]Artem wrote:
Peanut butter is an incomplete Protein? I eat that sometimes to get in extra calories. Most come from the fat though. [/quote]

yes, PB is an incomplete protein. and yes, it’s an easy way to get extra calories. that’s why I will usually have milk with a PB sandwich to get the other amino acids that are missing from the PB. and well they go together like lamb and tuna fish

^ bad analogy. lol.

[quote]cyph31 wrote:
reese cups contain protein !?[/quote]

Oh hell yeah, 4g a cup. I swear I ate at least 30 of those things Friday… that and Twix.

Thank you for the answers everyone. Now I know how that works.

[quote]elusive wrote:
^ bad analogy. lol.[/quote]

it’s from a movie :wink:

[quote]jehovasfitness wrote:
Artem wrote:
Peanut butter is an incomplete Protein? I eat that sometimes to get in extra calories. Most come from the fat though.

yes, PB is an incomplete protein. and yes, it’s an easy way to get extra calories. that’s why I will usually have milk with a PB sandwich to get the other amino acids that are missing from the PB. and well they go together like lamb and tuna fish[/quote]

I like to throw some black beans in with my PB sandwich too.

[quote]jehovasfitness wrote:
elusive wrote:
^ bad analogy. lol.

it’s from a movie ;)[/quote]

I know. Doesn’t he say, “maybe thats a bad analogy, umm like speghetti and meatballs”. Or someone said something like that. I dunno… I got to watch Big Daddy again.

We don’t get Reese’s here, but I’d be checking for Trans Fats if you’re eating that many.

[quote]elusive wrote:
All protein is not created equal. Each source of protein has a different amino acid sequence profile. That goes to say that eggs will be higher in certain amino acids than beef and vice versa. Since we all eat protein, essentially for the amino acids in which they contain, this becomes important. However, if your ingesting your protein from complete protein sources like dairy, eggs, beef, poultry, and fish your receiving a wide range of all the amino acids you need. Eating a majority of your protein from incomplete sources like plant based proteins (veggies, grains, and legumes) could leave your diet lacking of certain amino acids.[/quote]

Would you not grow if you did not recieve certain amino acids?

[quote]Stength4life wrote:
elusive wrote:
All protein is not created equal. Each source of protein has a different amino acid sequence profile. That goes to say that eggs will be higher in certain amino acids than beef and vice versa. Since we all eat protein, essentially for the amino acids in which they contain, this becomes important. However, if your ingesting your protein from complete protein sources like dairy, eggs, beef, poultry, and fish your receiving a wide range of all the amino acids you need. Eating a majority of your protein from incomplete sources like plant based proteins (veggies, grains, and legumes) could leave your diet lacking of certain amino acids.

Would you not grow if you did not recieve certain amino acids?
[/quote]

Yes leucine in particular.

[quote]redgladiator wrote:
Stength4life wrote:
elusive wrote:
All protein is not created equal. Each source of protein has a different amino acid sequence profile. That goes to say that eggs will be higher in certain amino acids than beef and vice versa. Since we all eat protein, essentially for the amino acids in which they contain, this becomes important. However, if your ingesting your protein from complete protein sources like dairy, eggs, beef, poultry, and fish your receiving a wide range of all the amino acids you need. Eating a majority of your protein from incomplete sources like plant based proteins (veggies, grains, and legumes) could leave your diet lacking of certain amino acids.

Would you not grow if you did not recieve certain amino acids?

Yes leucine in particular.
[/quote]

As well as others. The body is very complicated and if a person was missing/diffecient in a certain amino acid, this may prevent them from synthesizing other types of amino acids (because enzymes in the body are made of protein). This can of course lead to many different problems with both growth and health.