Let me make one point clear. You must understand the difference between glutamine peptides and L-Glutamine and why I feel peptides are much more effective. Science knows that the body absorbs amino acids in the form of di and tri peptides. This means that two or three amino acids are bonded together. Science is still UNCLEAR whether the body can use single amino acids or L form amino acids, amino acids like L-Glutamine. Therefore, always, try to use glutamine peptides over L-Glutamine. And yes, we still sell L-Glutamine at the Proteinfactory.com I do that because some of my customers still like L-Glutamine. Personally if I were going to chose one over the other I would defintely chose our glutamine peptides.

Typical Analysis, Chemical
Total Nitrogen	13.4 %
Protein (TN x 5.79), as is	77.6%
Protein (TN x 5.79), dry basis	81.3%
Peptide Bonded Glutamine	26%
Free Glutamine	<1%
Fat	0.1%
Carbohydrate, total	15.5%
Ash	2.3%
Moisture	4.5%
pH	4.0

Hydrolysis Characteristics
10,000	D	0%
10,000-5,000	D	1%
5,000-2,000	D	5%
1,000-500	D	18%
500	D	66%

Amino Acid Profile
Alanine	23 mg	Arginine	28 mg
Aspartic Acid	25 mg	Cysteine	16 mg
Glutamic Acid	408 mg	Glutamine	325 mg
Glycine	34 mg	Histidine	16 mg
Isoleucine	32 mg	Leucine	64 mg
Lysine	13 mg	Methionine	14 mg
Phenylalanine	53 mg	Proline	137 mg
Serine	44 mg	Threonine	23 mg
Tryptophan	4 mg	Tyrosine	30 mg
Valine	36 mg
Total 1,000 mg
Total BCAA 132 mg

Bodybuilding and Athletic Supplementation Description
Glutamine is the most abundant amino acid found in muscle tissue. "Glutamine constitutes over 60% of the total intramuscular amino acids" (Ref)."Skeletal muscle is the principal site of glutamine production and provides the majority of glutamine required by other tissues" (Ref). Glutamine is the most widely used amino acid in the body, during stress (high intensity weightlifting, dieting and malnutrition) glutamine levels in the body decrease at almost 50% (Ref). Unfortunately for athletes and bodybuilders hoping to benefit from glutamine, protein synthesis takes a back seat to the more important roles the body considers essential for survival, such as the immune system. In other words, ones body can only produce a certain amount of glutamine per day (about 50 mmon/h) (ref). Hence, the demand exceeds the supply, anabolic conditions are never met, thus supplementation is needed.

An anabolic state is what the athlete wishes to achieve with glutamine supplementation. "Glutamine acts a a regulator of protein synthesis, increasing protein synthesis and decreasing protein degradation of skeletal muscle--both actions being dependent on the size of the intracellular glutamine pool" (Ref). "Glutamine, in addition to alanine, is the major interorgan NITROGEN carrier. 90% of nitrogen is released as glutamine.

Several studies the Protein Factory feels are important in informing its customers about glutamine.

1. Glutamine itself may bet the direct precursor to muscle glycogen replenishment after exercise, best results require 20-40 grams of glutamine a day.
2. Glutamine may play a significant hepatoprotective role against hepatoxic effect of ANABOLIC STEROIDS (ref).
3. 2grams of glutamine significantly elevated growth hormone release (REF).

What's the difference between Glutamine, L-glutamine, Glutamic Acid, and Glutamine Peptides?
Glutamine is the amino acid in its free-form, which means it's in its whole food state, whenever you eat foods such as almonds and peanuts your ingesting glutamine amino acids. L-Glutamine is basically the same thing. Its glutamine in its free-form (whole food). The majority of supplement companies sell L-glutamine and tout it as the best form, which it is not.
Glutamic Acid is familiar if one turns over their container of protein powder and sees "glutamic acid". Why not glutamine instead of glutamic acid? "The reason is that the acid hydrolysis stage of the analysis converts the glutamine into glutamic acid, releasing ammonia. Thus the glutamic acid level actually represents the combined levels of glutamine and glutamic acid." (ref). One can figure out the amount of glutamine in the glutamic acid content fairly easy. In animal proteins such as whey, casein, milk, and egg proteins 50% is actually glutamine. In plant proteins such as soy, 80% is glutamine.

Glutamine Peptides in Layman's Terms
To understand the differences in glutamine peptides and regular glutamine, one must first obtain the knowledge of exactly what are peptides and how they are different from free form amino acids. Peptides are amino acids broken down into their smaller more digestible form using the hydrolyzation process. Only hydrolyzation can produce the smaller peptides, superior to free form amino acids and larger peptides currently found in your whey proteins that are produced NOT using the hydrolyzation method. The supplement companies make it sound difficult because there is a small amount of peptides that occur naturally, regularly commercially produced whole-protein supplements. Unfortunately, what the don't tell you is that these are the larger peptides with a high molecular weight, which is different from smaller di and tri peptides that are produced using the hydrolyzation method.
Several studies have shown that smaller peptides are better absorbed than larger peptides and regularly manufactured protein.

1. Amino acids from peptides are more readily absorbed than free-form amino acids, thus producing a greater insulin reaction.
2. Humans fed smaller peptides compared to whole-protein foods had a greater increase in amino acid levels.
3. Hydrolysated products produce greater pharmacological effects (increasing GH and insulin response).
4. OLIGOPEPTIDES are LARGER PEPTIDES, which are absorbed much SLOWER than small tri and di peptides. Supplement companies try to use the word "oligopeptides" to fool the customer with scientific mumbo-jumbo when they're actually stabbing themselves in the back!

Thus now our customers can see why the Protein Factory choose Glutamine peptides instead of free-form L-Glutamine. You will get a better response with glutamine peptides when compared to L-Glutamine.

For more information, check out the research behind the products:
Glutamine Peptides vs. L-Glutamine

Glutamine Peptides Research

Glutamine Peptides in Layman's Terms