Incomplete Proteins
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Thread: Incomplete Proteins
- 10-21-2005, 03:32 PM #1Registered User
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Incomplete Proteins
seems like we have a tough customer on another board
hes some vegetarian BBer, and he is basically saying that there is no such thing as an incomplete source as all veg have the 7-8 (or whatever) essential amino acids, making them all complete and useful!ORIGINAL: The Godfather (me)
... vegetable proteins (grains, legumes, nuts, seeds, and other vegetables) are incomplete proteins because they are missing, or do not have enough of, one or more of the essential amino acids."
"do not have enough of...?"
Yes, that's what I said in my prior post.
"they are missing, ...one or more of the essential amino acids"??
Totally false. Give me just one example of a plant food that is missing an essential AA?
from what i've been taught on here i'm assuming he is wrong right? any studies that prove this?
- 10-21-2005, 04:08 PM #2Registered User
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- 10-21-2005, 04:10 PM #3Fueled by Testosterone MODERATOR
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Most proteins do have all of the amino acids, but incomplete proteins are severely lacking some of them to the point where the amount is almost negligible. Technically they aren't incomplete, but effectively they are.
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- 10-21-2005, 04:11 PM #4Moderator MODERATOR
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http://users.rcn.com/jkimball.ma.ult...n.html#proteinProtein
Humans must include adequate amounts of 9 amino acids in their diet. These "essential" amino acids cannot be synthesized from other precursors. However, cysteine can partially meet the need for methionine (they both contain sulfur), and tyrosine can partially substitute for phenylalanine.
The Essential Amino Acids Histidine
Isoleucine
Leucine
Lysine
Methionine (and/or cysteine)
Phenylalanine (and/or tyrosine)
Threonine
Tryptophan
Valine
Two of the essential amino acids, lysine and tryptophan, are poorly represented in most plant proteins. Thus strict vegetarians should take special pains to ensure that their diet contains sufficient amounts of these two amino acids.
http://www.cocoonnutrition.org/catal...aminoacids.phpVegetarians do not have certain amino acids in their diets, such as Lysine, which is found in eggs and poultry products. A deficiency in even one amino acid will cause a biochemical imbalance creating health problems, and the amino acid(s) should be replaced for good physical and mental health.
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- 10-21-2005, 06:39 PM #5Registered User
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thanks guys!
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