Fragment 176-191 & Mod GRF 1-29 & Ipamorelin Blend (12mg)

Fragment 176-191 & Mod GRF 1-29 & Ipamorelin Peptide Blend

Studies have suggested that a maximal output of endogenous growth hormone (GH) from the anterior pituitary gland might be attained through a combination of growth hormone-releasing hormone (GHRH) analog and agonist of growth hormone secretagogue receptor (GHSR).^[1] The combination of Ipamorelin with Modified GRF is one of the various combinations researchers have studied in an effort to achieve maximal growth hormone production. Interestingly, more specific results appear to be achieved beyond the increase in GH synthesis by refining the choice of GHRH and GHSR evaluated in a particular study. Modified GRF, which researchers have suggested may be a potent GHRH analog, may have impacts beyond growth hormone release. It has been speculated to impact intestinal inflammation, tissue repair, and cardiac function in addition to researchers’ suppositions on its impact on growth hormone release. Ipamorelin, classified as a growth hormone secretagogue, appears to interact with the GHSRs, also known as ghrelin receptors, and may have the potential to impact bone growth. Activating the ghrelin receptors may affect appetite, to increase food consumption and total weight gain. Depending on the desired outcome of the particular study, namely the addition or reduction of weight, this specific receptor activity may be mitigated by adding lipolytic molecules, which may help minimize the possibility of fat increase. Fragment 176-191 is often combined with Ipamorelin and other research peptides. The peptide known as Fragment 176-191, also referred to as hGH Fragment 176-191, Frag 176-191, tyr-hGH 177-191, or AOD-9604, is hypothesized to specifically target the fat-reduction pathways of growth hormone. This peptide consists of a sequence of 16 amino acids derived from the terminal portion of the growth hormone molecule, identified by researchers as the “lipolytic fragment” due to its potential fat-burning capabilities. The term ‘lipolytic’ describes the fragment’s capacity to promote fat breakdown. To enhance the peptide’s stability, the initial amino acid in the hGH Fragment 176-191 sequence is substituted with tyrosine, leading to its alternate designation as Fragment tyr-hGH 177-191.^[2][3]

Fragment 176-191 Specifications

Molecular Formula: C₇₈H₁₂₅N₂₃O₂₃S₂

Molecular Weight: 1817.1 g/mol

Sequence: Tyr-Leu-Arg-Ile-Val-Gin-Cys-Arg-Ser-Val-Glu-Gly-Ser-Cys-Gly-Phe

Mod GRF 1-29 Specifications

Molecular Formula: C₁₅₂H₂₅₂N₄₄O₄₂

Molecular Weight: 3367.95 g/mol

Sequence: H-Tyr-D-Ala-Asp-Ala-Ile-Phe-Thr-Gln-Ser-Tyr-Arg-Lys-Val-Leu-Ala-Gln-Leu-Ser-Ala-Arg-Lys-Leu-Leu-Gln-Asp-Ile-Leu-Ser-Arg-NH2

Ipamorelin Specifications

Molecular Formula: C₃₈H₄₉N₉O₅

Molecular Weight: 711.85 g/mol

Sequence: Aib-His-D-2Nal-D-Phe-Lys-NH2

Fragment 176-191 & Mod GRF 1-29 & Ipamorelin Peptide Research

Frag 176-191 & Mod GRF 1-29 & Ipamorelin and Growth Hormone Pulsatility
Although no direct studies have focused on Modified GRF 1-29 actions, research has been conducted on peptides with similar structures. One study, in particular, evaluated the influence of a Modified GRF 1-29 analog on various physiological functions, including the production of growth hormone and insulin-like growth factor 1 (IGF-1) and the proliferation of skin cells and muscle tissue growth. The findings from this study indicate that the Modified GRF 1-29 analog may potentially affect the growth hormone IGF-1 signaling pathway. More cautiously, the results suggest that this peptide might enhance the release of growth hormone by 70% to 107% over a 12-hour period from the somatotroph cells in the anterior pituitary gland. Additionally, a rise in IGF-1 levels by approximately 28% was observed, which may suggest enhanced functionality of the growth hormone-IGF-1 axis.^[4] Further research has also hinted at the possibility that Ipamorelin may increase growth hormone levels to about 80mIU/l (equivalent to 26.6ng/ml), a significant increase compared to the baseline levels of 1.31mIU/l or 0.4ng/ml in controls, potentially representing an increase of over 60 times.^[5]

Frag 176-191 & Mod GRF 1-29 & Ipamorelin and Body Composition
Researchers hope to find potential in these peptides to promote fat cell loss and increase muscle cell growth. Of the three, Fragment 176-191 (Frag 176-191) is considered to carry a lipolytic fragment. It appears to act on the beta-3 adrenergic receptors (ADRB3). This peptide has been suggested to increase fat cell dissolution in fatty tissues and fat breakdown by triggering thermogenesis (heat production) in skeletal muscles by acting on these receptors.^[6] Researchers have noticed that knock-out mice without ADRB3 receptors appear to not respond to the actions of Fragment 176-191.^[7] Fragment 176-191 may potentially engage additional cellular signaling pathways that indirectly promote fat metabolism. This may involve modulating pathways that increase the expression of enzymes considered critical to the process of lipolysis, or it may enhance the cellular responsiveness to lipolytic signals through the regulation of secondary messenger activities within the cell. Interestingly, researchers noticed that Fragment 176-191 only appeared to lead to weight loss in obese mice and did not appear to affect lean mice. It was reported to lead to a nearly 50% reduction in weight gain in obese mice noticed over three weeks. Additionally, this topic has been investigated through clinical studies, with METAOD005 being a prominent example. This study aimed to assess the fat-reducing potential of this specific peptide over a period of 12 weeks. Preliminary findings suggest that one of the Fragment 176-191 test groups might have experienced a noticeable reduction in body weight, estimated at approximately 5.7 pounds. Furthermore, it was hypothesized that the peptide may have potentially contributed to enhanced cholesterol profiles and improved glucose tolerance.^[8]

Other elements of this blend, such as Mod GRF (1-29), have been studied in relation to improving body composition by increasing muscle cells. The apparent increase in muscle mass may be due to two mechanisms triggered by this peptide: muscle hypertrophy (increase in the size of muscle fibers) and muscle hyperplasia (increase in the number of muscle fibers).

It has been proposed that Ipamorelin may exert action in promoting anabolic activity, potentially through its involvement in the synthesis of growth hormone (hGH) and Insulin-like Growth Factor 1 (IGF-1). This hypothesis may be explored by examining its influence on nitrogen balance. In separate research, the action of Ipamorelin on liver markers related to alpha-amino-nitrogen transformation during catabolic states was investigated. The study specifically focused on the liver’s ability to produce urea-N (CUNS), which may serve as a measure of the liver’s nitrogen processing capabilities. Researchers examined the levels of messenger RNA (mRNA) for enzymes involved in the urea cycle, evaluated the overall nitrogen balance, and theorized about the distribution of nitrogen among various organs. Preliminary results indicated experimentation with Ipamorelin may be associated with an approximate 20% reduction in CUNS compared to conditions of induced catabolism. Additionally, there was a potential decrease in the expression of urea cycle enzymes, a possible reestablishment of nitrogen balance.^[9]

Frag 176-191 & Mod GRF 1-29 & Ipamorelin and Bone, Joint Function
Researchers suggested that when the hGH Fragment 176-191 was introduced in conjunction with hyaluronic acid in a study evaluating the impact of growth hormone in inhibiting consequences of osteoarthritis, they suggested the peptide may potentiate joint cartilage growth. The study suggested that peptide exposure in animal models of osteoarthritis appeared to improve joint cartilage.^[10] These studies also reported that the apparent improvement was more marked when introduced in combination with hyaluronic acid. Kwon et al. concluded that “AOD9604 [exposure] using ultrasound guidance enhanced cartilage regeneration, and combined AOD9604 and HA … were more effective than HA or AOD9604 … alone in the collagenase-induced knee OA rabbit model.”

In addition, peptides such as Modified GRF 1-29 and Ipamorelin have been suggested to improve bone function by activating bone cells via GH-mediated pathways. The action of these peptides within the organism may lead to increased activity, proliferation, and differentiation of bone-forming cells. It may also lead to an increase in bone mineral density (BMD) or bone mineral content (BMC). It has been suggested that Ipamorelin might potentially enhance bone mineral density. This hypothesis revolves around the possibility that Ipamorelin may activate osteoblasts—the cells responsible for bone formation—through mechanisms mediated by Growth Hormone (hGH), potentially resulting in increased proliferation, cell growth, and differentiation. In a specific study, mice were exposed either to Ipamorelin or a control compound. The actions of Ipamorelin on bone mineral density were meticulously monitored using real-time dual X-ray absorptiometry (DEXA) at key anatomical sites, such as the femur and L6 vertebra. Following the study period, further analysis of the femur was conducted using mid-diaphyseal peripheral quantitative computed tomography (pQCT) scans. Initial results suggested that the peptide might have contributed to increased body mass and possibly to higher bone mineral content (BMC) in the tibia and vertebrae, as indicated by DEXA measurements, compared to those in the control group. Additionally, pQCT data suggested that the increase in cortical BMC observed may be attributed to an increase in the cross-sectional area of the bones. However, the cortical volumetric bone mineral density (BMD)—which reflects the density of BMC per unit area—appeared to have remained constant. Consequently, it is plausible to infer that there was an expansion in the volume of both the femur and the L6 vertebrae, given that the BMC reportedly increased while the volumetric BMDs remained stable.^[11]

Frag 176-191 & Mod GRF 1-29 & Ipamorelin and Cell Aging
A blend of growth hormone-stimulating peptides, of which these three are classified, may potentially stimulate the natural increase in growth hormone levels. An increase in growth hormone levels has been associated with improved cell proliferation due to telomere shortening and a reduction in cellular death due to a decline in processes such as oxidative stress.^[12]

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