FRAGMENT 176 – 191 (10 MG)

(2 customer reviews)


Molecular Formula: C78H125N23O23S2
Molecular Weight: 1812.12 g/mol
CAS Number: 66004-57-7

For researchers, this amino chain has been quite popular.  Researchers have identified its ability to aid in gaining muscle and losing fat. But what is it, and how does it work? Let’s dive into this intriguing compound and its potential benefits. Fragment 176-191 (modified version of AOD9604) is a small piece of human growth hormone (hGH) that is sometimes referred to as the “lipolytic fragment.” Fragment 176-191 earned this latter name due to the fact that laboratory research has shown it to enhance fat burning, particularly in mice genetically engineered to produce large fat stores. Fragment 176-191 has been heavily researched in animal models because even while it preserves the fat-burning effects of hGH, it avoids some other effects of its parent protein such as increasing insulin-like growth factor-1 (IGF-1) levels, negatively impacting carbohydrate metabolism, altering insulin sensitivity, increasing long bone growth, and so forth. The targeted effects of fragment 176-191 make it useful for exploring human fat metabolism and may eventually provide the basis for developing anti-obesity medications.


The Science Behind Fragment 176-191

Origin and Development

Fragment 176-191 is a modified form of amino acids 176-191 of the human Growth Hormone (hGH) polypeptide. It’s specifically designed to target fat burning while sparing muscle tissue. Mechanism of Action Fragment 176-191 works by mimicking the way natural Growth Hormone regulates fat metabolism. But, unlike hGH, it doesn’t affect blood sugar or tissue growth. How neat is that? It selectively stimulates the breakdown of fat and inhibits its formation.

Fragment 176-191 is the offspring of the 176-191 sequence of amino acids present in the human Growth Hormone (hGH) polypeptide, metamorphosed to catalyze fat dissolution while preserving muscle tissue. 

The cunning strategy of Fragment 176-191 involves emulating the natural Growth Hormone’s fat management tactics. However, it remains aloof from impacting blood glucose levels or tissue expansion. Quite ingenious, don’t you think? It judiciously promotes fat dismantling and curbs its genesis.


Benefits of Fragment 176-191 Include:

Weight Loss 

When it comes to weight loss, Fragment 176-191 is a real game-changer. Its unique ability to promote lipolysis (the breakdown of fat) while inhibiting lipogenesis (the formation of fatty acids) makes it an effective tool for weight management.   Fragment 176-191 is a veritable revolution in the weight loss arena. Its singular prowess in stimulating lipolysis (fat breakdown) and impeding lipogenesis (fatty acid formation) brands it an invaluable asset for weight governance.

Improved Metabolism 

By stimulating the breakdown of fat, Fragment 176-191 also boosts your metabolism. This can lead to increased energy levels, better workout performance, and overall improved health.  In catalyzing fat breakdown, Fragment 176-191 inadvertently elevates your metabolism. This metabolic uptick can augment energy levels, enhance workout efficiency, and overall boost wellbeing.

Muscle Growth

Although primarily used for fat loss, Fragment 176-191 can also contribute to muscle growth. It does so indirectly by improving your metabolic function and body composition. And who doesn’t want lean, toned muscles.  Primarily renowned for fat dissolution, Fragment 176-191 can be a silent contributor to muscle augmentation. It acts indirectly by amplifying your metabolic function and refining your body composition. Who could resist the allure of sleek, chiseled muscles?


Potential Side Effects 

Common Side Effects While generally well-tolerated, some users might experience side effects like fatigue, water retention, or mild headaches. Precautions and Considerations Fragment 176-191 is a powerful compound, and like all supplements, it’s not for everyone. Pregnant or breastfeeding women, people with certain medical conditions, and those taking specific medications should avoid using it. 

Generally, Fragment 176-191 is well assimilated, but some users may encounter fatigue, fluid retention, or mild cephalgia. It’s imperative to heed your body’s signals and adjust dosage or abstain from usage as deemed necessary.


Frequently Asked Questions Related to Fragment 176-191

Is Fragment 176-191 safe for consumption?

Fragment 176-191 is generally well-absorbed but may induce side effects in certain individuals. What is the working mechanism of Fragment 176-191? Fragment 176-191 operates by emulating the natural Growth Hormone’s fat management tactics, without impacting blood glucose levels or tissue expansion. It judiciously stimulates fat dismantling and inhibits its genesis.

Can Fragment 176-191 be used for weight reduction?

Indeed, Fragment 176-191 has earned a reputation for promoting weight reduction by amplifying metabolism and catalyzing fat breakdown.

Can Fragment 176-191 assist in muscle augmentation?

Indirectly, indeed. While its primary function is fat dissolution, Fragment 176-191 can contribute to muscle growth by enhancing metabolic function and refining body composition.

What is the recommended usage protocol for Fragment 176-191?

Undeniably, Fragment 176-191 is an intriguing entity teeming with potentialities for weight management, muscle fortification, and metabolic optimization. Albeit its allure, it necessitates an informed and cautious approach to its utilization. Let’s not overlook that supplements, such as Fragment 176-191, are not replacements for a well-balanced nutritional intake and consistent physical exertion.  Ultimately further research into Fragment 176-191 is needed.


Below are some findings from a number of past researches been done by renowned peptides researchers on Fragment 176-191:

Fragment 176-191 Effects

Lowers Blood Sugar

Research in animals has revealed that the c-terminal end of hGH is primarily responsible for the protein’s hypoglycemic (lowering blood sugar) effects. Testing of at least six different fragments derived from this section of hGH has shown that fragment 176-191 is the most effective synthetic derivative of hGH for lowering blood sugar levels. This effect is secondary to a sustained increase in plasma insulin levels[1]. There is some interest in using fragment 176-191 as a treatment for both prediabetes and type 2 diabetes.

Fat Burning And Weight Loss

Fragment 176-191 has earned the nickname of “lipolytic fragment” because testing in mice has revealed the peptide to have substantial fat burning and weight loss properties. It is thought that this action is mediated through an increase in production of beta-3 adrenergic receptors (β3-AR or ADRB3)[2]. Agonist action at ADRB3 is known to directly increase fat burning in adipose tissue and is also responsible thermogenesis in skeletal muscle[3]. Mice that have been genetically modified to produce no ADRB3 do not respond to the lipolytic effects of hGH or fragment 176-191[2].

Studies show that the increased fat burning associated with fragment 176-191 directly correlates with energy expenditure and thus weight reduction, leading to a nearly 50% reduction in weight gain in obese animals over a three-week course[4]. Interestingly, the weight loss effects were seen only in obese mice, with lean mice maintaining normal body weight, on average, even when exposed to fragment 176-191[2]. These findings indicate that there are secondary regulatory pathways for lipolysis that override ADRB3 function when body weight is at or near ideal, opening up areas for additional research into energy homeostatsis.

Promotes Cartilage Regeneration

Though fragment 176-191 is primarily of interest for its lipolytic properties, the peptide is under investigation for other possible benefits. Of note, a 2015 article out of Korea revealed that fragment 176-191 may be able to potentiate the effects of hyaluronic acid injections in promoting cartilage regeneration. Studies in rabbits indicated that weekly injections of fragment 176-191 increase laboratory measures of cartilage growth and that co-administration of the peptide with hyaluronic acid (HA) produces even more substantial effects. Similarly, the study found that fragment 176-191, both alone and in combination with HA, reduces disability associated with osteoarthritis. There is hope that this may lead to advanced therapies for osteoarthritis and may even eliminate the need for surgery in certain settings[7].

Fragment 176-191 Safety Studies

There is some concern that the use of hGH or its derivatives for weight control may have unwanted side effects. This concern arises from the fact that studies of hGH have shown that long-term exogenous administration, while increasing lean body mass and decreasing adipose tissue, can also cause: increased insulin resistance, diabetes, acromegaly, cancer, hypertension (high blood pressure), and edema (swelling).

In 2013, a study published in the Journal of Endocrinology and Metabolism evaluated six studies of fragment 176-191 to assess the rate and significance of negative effects associated with the peptide. The study, included only research that followed the randomized, double-blinded, placebo-controlled model of a phase IIb clinical trial in order to keep the highest possible standards of evidence. It found that IV and oral administration of Fragment 176-191, when compared to placebo, led to no changes in: physical findings, laboratory parameters,  glucose levels, glucose tolerance, insulin sensitivity, IGF-1 levels, or rates of adverse events (e.g. headache)[4], [5].

The results of this meta-analysis suggest that fragment 176-191 offers many of the benefits of hGH without the associated negative (and often serious) side effects. These findings further the argument for pursuing regulatory approval for use of fragment 176-191 in the clinical setting, but also offer insight into the regulation of human growth, fat deposition, and energy homeostasis. These findings make it clear that it is possible to target fat loss without affecting energy homeostasis in other nutrient pathways, opening the door for a deeper exploration of human energy regulation and methods of manipulating it.

It is worth noting that while hGH has anabolic effects on muscle, fragment 176-191 was specifically selected for its ability to avoid anabolism entirely. This is critical to ensuring that the peptide has targeted lipolytic effects and does not produce acromegaly or any of the other conditions associated with hGH administration. Studies in mice reveal that fragment 176-191 does not increase cell proliferation[6].)

Fragment 176-191 Research

The primary area of research for fragment 176-191 is in weight loss and lipolysis where significant effort is being expended to learn how the peptide can be used to understand fat metabolism and energy homeostasis. The most active secondary area of research is in connective tissue regeneration, particularly cartilage repair.

Article Author

The above literature was researched, edited and organized by Dr. Logan, M.D. Dr. Logan holds a doctorate degree from Case Western Reserve University School of Medicine and a B.S. in molecular biology.

Scientific Journal Article

Frank NG, M.D. is one of the leading scientists discovering how both AOD9604 and Fragment 176-191 function. He extensively studied their effects on lipid metabolism in obese mice, fat oxidation, weight loss, oral digestion, glucose transport, and hyperglycemia. He has over 64 publications and studies at the Department of Biochemistry and Molecular Biology — Monash University, Australia. Frank NG, M.D. is being referenced as one of the leading scientists involved in the research and development of Fragment 176-191. In no way is this doctor/scientist endorsing or advocating the purchase, sale, or use of this product for any reason. There is no affiliation or relationship, implied or otherwise, between and this doctor. The purpose of citing the doctor is to acknowledge, recognize, and credit the exhaustive research and development efforts conducted by the scientists studying this peptide. Frank NG, M.D. is listed in [1] [2] and [4] under the referenced citations.

References and Citations

[1] F. M. Ng and J. Bornstein, “Hyperglycemic action of synthetic C-terminal fragments of human growth hormone,” Am. J. Physiol., vol. 234, no. 5, pp. E521-526, May 1978.

[2] M. Heffernan et al., “The Effects of Human GH and Its Lipolytic Fragment (AOD9604) on Lipid Metabolism Following Chronic Treatment in Obese Mice andβ 3- AR Knock-Out Mice,” Endocrinology, vol. 142, no. 12, pp. 5182–5189, Dec. 2001.

[3] R. Ferrer-Lorente, C. Cabot, J.-A. Fernández-López, and M. Alemany, “Combined effects of oleoyl-estrone and a beta3-adrenergic agonist (CL316,243) on lipid stores of diet-induced overweight male Wistar rats,” Life Sci., vol. 77, no. 16, pp. 2051–2058, Sep. 2005.

[4] F. M. Ng, J. Sun, L. Sharma, R. Libinaka, W. J. Jiang, and R. Gianello, “Metabolic studies of a synthetic lipolytic domain (AOD9604) of human growth hormone,” Horm. Res., vol. 53, no. 6, pp. 274–278, 2000.

[5] H. Stier, E. Vos, and D. Kenley, “Safety and Tolerability of the Hexadecapeptide AOD9604 in Humans,” J. Endocrinol. Metab., vol. 3, no. 1–2, pp. 7-15–15, Apr. 2013.

[6] M. A. Heffernan et al., “Increase of fat oxidation and weight loss in obese mice caused by chronic treatment with human growth hormone or a modified C-terminal fragment,” Int. J. Obes. Relat. Metab. Disord. J. Int. Assoc. Study Obes., vol. 25, no. 10, pp. 1442–1449, Oct. 2001.

[7] D. R. Kwon and G. Y. Park, “Effect of Intra-articular Injection of AOD9604 with or without Hyaluronic Acid in Rabbit Osteoarthritis Model,” Ann. Clin. Lab. Sci., vol. 45, 4, pp. 426–432, Jul. 2015.


2 reviews for FRAGMENT 176 – 191 (10 MG)

  1. Edward

    We had an excellent experience working with All the products where just as they described.

  2. Miller

    Effective and fast-acting! Fragment 176-191 has shown promising results in helping our test subjects shed fat. We will definitely reorder for further studies.

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Product Usage: This PRODUCT IS INTENDED AS A RESEARCH CHEMICAL ONLY. This designation allows the use of research chemicals strictly for in vitro testing and laboratory experimentation only. All product information available on this website is for educational purposes only. Bodily introduction of any kind into humans or animals is strictly forbidden by law. This product should only be handled by licensed, qualified professionals. This product is not a drug, food, or cosmetic and may not be misbranded, misused or mislabeled as a drug, food or cosmetic.