GHRH analog comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Updated 2026-03-31. Numbers and descriptions here follow the published literature rather than marketing material.
Stability depends heavily on physical state. A lyophilized powder kept dry, desiccated, and shielded from light typically holds its integrity for months to years at minus twenty degrees Celsius, and longer at minus eighty. Once dissolved, the peptide becomes far more vulnerable, since peptide bond hydrolysis, oxidation of susceptible residues, and aggregation all proceed faster in solution. Buffers near neutral pH are generally gentler than strongly acidic or alkaline conditions. Repeated freeze-thaw cycles and exposure to air-liquid interfaces during vigorous mixing cause losses that are easy to overlook.
Verification matters because research peptides vary widely in quality. A certificate of analysis is only as reliable as the method behind it, and a single chromatographic trace reveals little about counter-ions, residual solvents, or water content. Independent laboratories commonly pair mass confirmation with chromatographic purity and, where relevant, quantify water along with acetate or trifluoroacetate content. Reported purity figures are not standardized across suppliers, so a stated value such as ninety-eight percent is not directly comparable unless the analytical method, column, and detection wavelength accompany it.
Characterization of this peptide relies on a small set of routine techniques. Reversed-phase high-performance liquid chromatography separates the target from truncated or oxidized by-products and yields a purity estimate when paired with ultraviolet detection near 214 nanometers. Mass spectrometry, either electrospray coupled to liquid chromatography or matrix-assisted laser desorption, confirms that the observed mass matches the value calculated for the expected sequence. Amino acid analysis, and enzymatic digestion followed by fragment mapping, are used when the sequence itself rather than the mass requires verification.
CJC-1295 is the name used for a synthetic peptide modeled on growth hormone-releasing hormone, the hypothalamic signal that prompts the pituitary to release growth hormone. The compound was described by a Canadian drug discovery company in the mid-2000s as a long-acting research tool. Two closely related molecules share the name in practice: one carries a drug affinity complex, or DAC, group, and one does not. The distinction matters because the two behave differently in circulation.
The peptide backbone corresponds to GRF(1-29), the first 29 residues of native growth hormone-releasing hormone, which retains most of the receptor-activating activity of the full-length molecule. Four substitutions distinguish the analog from the natural sequence: D-alanine at position 2, glutamine at position 8, alanine at position 15, and leucine at position 27. These changes slow cleavage by dipeptidyl peptidase IV, the enzyme that degrades native hormone in plasma within minutes. The outcome is improved enzymatic stability combined with a still brief residence time when no additional modification is present.
Naming in this area is inconsistent, and readers should treat product labels with care. In much of the literature and in vendor catalogs, the unqualified term refers to the albumin-binding version, while the version lacking the DAC group appears as modified GRF(1-29), mod GRF(1-29), or the same name with a without-DAC qualifier. Because one abbreviation has been applied to both materials, the only reliable way to identify a sample is to check the stated sequence and the presence of the linker.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white powder | Assessed by visual inspection under ordinary light |
| Primary analytical method | Reversed-phase liquid chromatography | Purity estimated from peak area at 214 nm |
| Confirmatory method | Mass spectrometry | Observed mass compared with calculated value |
| Powder storage temperature | Minus 20 degrees Celsius | Minus 80 for extended archival periods |
| Solution stability | Hours to days at 2 to 8 degrees Celsius | Influenced by pH, buffer, and concentration |
Purity is most often assessed by reversed-phase high-performance liquid chromatography, reported as a percentage of total peak area. Identity is confirmed by mass spectrometry, which yields a molecular ion consistent with the expected sequence. Amino acid analysis and peptide mapping provide additional characterization. Reported purity values are method-dependent, so figures from different laboratories are not always directly comparable without details of column, gradient, and detection wavelength.
Peptide degradation proceeds mainly through hydrolysis, oxidation of methionine, and deamidation of asparagine or glutamine residues. The maleimide group on the albumin-binding variant can also react with thiols or hydrolyze in aqueous media. Because these pathways accelerate with temperature and pH extremes, handling conditions strongly influence measured stability. Stability data in the public literature are limited and often generated under differing conditions, so general statements about shelf life should be read as approximate.
Research material is normally supplied as a freeze-dried powder in sealed vials. In that state the peptide is comparatively robust, but prolonged exposure to warmth, moisture, or light accelerates degradation. Storage at minus twenty degrees Celsius or lower, with desiccant and protection from light, is the commonly described practice. Vials should be allowed to reach room temperature before opening to limit condensation on the powder. Moisture uptake during handling is a recognized source of variability in later measurements.
Laboratory handling centers on minimizing exposure to water, heat and oxygen before use. Working solutions are typically prepared in sterile water or a mild buffer, and any residual particulate matter is removed by filtration. When the powder dissolves slowly, a small proportion of acetonitrile or dilute acetic acid is sometimes added as a co-solvent. Containers are kept sealed and desiccated between uses. Records of lot number, reconstitution date and storage conditions support later comparison of results across experiments.
Identity and purity are established with reversed phase high performance liquid chromatography coupled to mass spectrometry. The chromatographic step separates the target peptide from truncated sequences and deletion products, while the mass measurement confirms the expected molecular weight to within a fraction of a dalton. Because the two common variants differ by the presence of the linker, mass alone can distinguish them in the unconjugated state. Amino acid analysis and peptide mapping are used when sequence level confirmation is required.
Lyophilized material is generally stable for extended periods when held at minus twenty degrees Celsius or below and protected from moisture and light. In solution the peptide is more labile; bond hydrolysis, aggregation and oxidation of susceptible residues all proceed faster at ambient temperature. Repeated freeze and thaw cycles should be avoided because they promote clumping and loss of soluble material. The conjugated variant adds a further consideration, since the maleimide group can hydrolyze in aqueous buffer and lose its ability to react with albumin.
Four amino acid substitutions separate the modified backbone from the parent GRF(1-29) sequence. These changes reduce recognition by dipeptidyl peptidase IV and related proteases, extending the interval before degradation. Development work in this area sought longer-acting GHRH analogs for endocrine investigation. Published descriptions treat the substitution set as a defining property of the core sequence, while the albumin-binding linker is described separately as an optional addition to that same backbone.
CJC-1295 is a synthetic peptide analog of growth hormone-releasing hormone, constructed on the 29-amino-acid fragment designated GRF(1-29). The name began as an internal development code during the 1990s and later spread through research supply catalogs and discussion forums. The molecule does not occur in nature; its sequence is engineered rather than isolated from tissue. Two related compounds are sold under this single label, and they differ by one appended chemical group that strongly influences how long the peptide remains in circulation.
== Division of Laboratory Systems == The Division of Laboratory Systems ('DLSs) purpose is to improve the quality of laboratory testing and related practices in the U.S. and globally through the development and evaluation of innovative training, technical standards, practice guidelines, and reference materials. Major Products or Services provided by DLS include:
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== Pharmacokinetics == After oral ingestion, glycyrrhizin is hydrolysed to 18β-glycyrrhetinic acid (enoxolone) by intestinal bacteria. After absorption from the gut, 18β-glycyrrhetinic acid is metabolised to 3β-monoglucuronyl-18β-glycyrrhetinic acid in the liver. This metabolite circulates in the bloodstream. Consequently, its oral bioavailability is poor. Most of it is eliminated by bile and only a minor part (0.31–0.67%) by urine. After oral ingestion of 600 mg of glycyrrhizin the metabolite appeared in urine after 1.5 to 14 hours. Maximal concentrations (0.49 to 2.69 mg/L) were achieved after 1.5 to 39 hours and metabolite can be detected in the urine after 2 to 4 days.
Sources: en.wikipedia.org
=== Development of synthetic AAS === The development of muscle-building properties of testosterone was pursued in the 1940s, in the Soviet Union and in Eastern Bloc countries such as East Germany, where steroid programs were used to enhance the performance of Olympic and other amateur weight lifters. In response to the success of Russian weightlifters, the U.S. Olympic Team physician John Ziegler worked with synthetic chemists to develop an AAS with reduced androgenic effects. Ziegler's work resulted in the production of metandienone, which Ciba Pharmaceuticals marketed as Dianabol. The new steroid was approved for use in the U.S. by the Food and Drug Administration (FDA) in 1958. It was most commonly administered to burn victims and the elderly. The drug's off-label users were mostly bodybuilders and weight lifters. Although Ziegler prescribed only small doses to athletes, he soon discovered that those having used metandienone developed enlarged prostates and atrophied testes. AAS were placed on the list of banned substances of the International Olympic Committee (IOC) in 1976, and a decade later, the committee introduced "out-of-competition" doping tests because many athletes used AAS in their training period rather than during competition.
Robinson ran for a fourth time for Oregon's 4th congressional district in 2016. He ran against Jo Rae Perkins, a former Linn County Republican party chairwoman, in the primary election and won with 67 percent of the vote. In the general election on November 8. Robinson once again faced DeFazio, who won his primary election with 93 percent of the vote. DeFazio prevailed once more, 55%-40%.
S. divinorum (0.89 mg/g to 3.70 mg/g). S. recognita (212.9 μg/g). S. cryptantha (51.5 μg/g). S. glutinosa (38.9 μg/g). Salvinorin B has been detected in S. potentillifolia and S. adenocaulon, however these species do not contain a measureable amount of salvinorin A.
=== LS-SCLC === Chest X-rays are typically the first step to evaluate someone for any type of lung cancer. If images show suspicious spots on the patient's lung, a healthcare provider may order chest CT, PET, needle biopsy or bronchoscopy for further check. It is possible to use bronchoscopic biopsy to diagnose Lung small-cell carcinoma. However, small-cell carcinoma tissue obtained through bronchoscopy is prone to tissue compression and unclear morphology. However, pathologists can stain lesions with immunohistochemistry Ki-67, CD56, TTF-1, CgA, Syn, P63, CK5/6, LCA, and 34βE12 to help, in order to make a differential diagnosis.
Sources: en.wikipedia.org
== Academic and professional activities == Throughout 37 years of activity, Mendes published some 150 articles, During this time, he created various inventions and innovations in the field of Implant Surgery, Bio materials, Orthopedic instruments and surgical techniques. As a result, he is the owner of several international patents. Mendes introduced the Total Knee Arthroplasty operation for the first time in Israel, a technology he studied in the USA. By combining materials developed in Germany and France, he was able to extend the service life of the implant. As part of his activities in the Center for Implant Surgery, Mendes created a platform for cooperation with researchers from the Technion, the Hebrew University and the high tech industry. These efforts were directed at the investigation of influence of different types of energy on bone restructure and fracture healing, development of new implants and replacement parts for joints and ligaments and contributed to the arising field of Computed Tomography. Together with International teams financed by the German-Israel Foundation, Mendes managed several research efforts into the replacement of ligaments with synthetic fibers and the design of artificial replacement of the bony patella.
=== Reuse of intermodal steel shipping containers === The widespread availability and relative cheapness of used intermodal shipping containers meant that architects began to consider them as an alternative to traditional building materials. Used shipping containers have been converted for use in housing, and as retail and office spaces. Examples of its use include the Cité A Docks student housing project in Le Havre, France; the Wenckehof container village in Amsterdam; the portable Puma City store in US cities; the food and retail Boxpark in London; the Dordoy Bazaar in Bishkek, Kyrgyzstan; the temporary mall Re:START in Christchurch, New Zealand built after the 2011 Christchurch earthquake, and as intensive-care units in temporary hospitals during the COVID-19 pandemic. The Smoky Park Supper Club in Asheville, North Carolina, opened in 2015, was constructed from 19 containers and is considered " "America's largest recycled shipping container restaurant." It has however been pointed out there are problems with recycling shipping containers, that it may not be as ecologically friendly or cheap an option as it might appear. The containers may be coated with harmful chemicals such as chromate, phosphorus, and lead-based paints, while its wooden floors may be treated with toxic insecticides, and some cost and effort are involved in modifying containers to make them habitable. Others have noted various issues such as space constraint, insulation, and structural weakness if too much steel is cut out of the containers.
== Rationale: dissolution rate and bioavailability == The primary motivation for micronizing pharmaceutical solids is to accelerate their dissolution in biological fluids. For a drug administered as a solid dosage form, bioavailability depends on the rate at which solid drug dissolves in the gastrointestinal tract relative to the rate at which the dissolved drug permeates intestinal membranes. The Noyes–Whitney equation, formulated in 1897, expresses dissolution rate as
Onset of type 2 diabetes can be delayed or prevented through proper nutrition and regular exercise. Intensive lifestyle measures may reduce the risk by over half. The benefit of exercise occurs regardless of the person's initial weight or subsequent weight loss. High levels of physical activity reduce the risk of diabetes by about 28%. Evidence for the benefit of dietary changes alone, however, is limited, with some evidence for a diet high in green leafy vegetables and some for limiting the intake of sugary drinks. There is an association between higher intake of sugar-sweetened fruit juice and diabetes, but no evidence of an association with 100% fruit juice. A 2019 review found evidence of benefit from dietary fiber. A 2017 review found that, long term, lifestyle changes decreased the risk by 28%, while medication does not reduce risk after withdrawal. While low vitamin D levels are associated with an increased risk of diabetes, correcting the levels by supplementing vitamin D3 does not improve that risk. In those with prediabetes, diet in combination with physical activity delays or reduces the risk of type 2 diabetes, according to a 2017 Cochrane review. In those with prediabetes, metformin may delay or reduce the risk of developing type 2 diabetes compared to diet and exercise or a placebo intervention, but not compared to intensive diet and exercise, and there was not enough data on outcomes such as mortality and diabetic complications and health-related quality of life, according to a 2019 Cochrane review.
=== Free testosterone === Lipophilic hormones (soluble in lipids but not in water), such as steroid hormones, including testosterone, are transported in water-based blood plasma through specific and non-specific proteins. Specific proteins include sex hormone-binding globulin (SHBG), which binds testosterone, dihydrotestosterone, estradiol, and other sex steroids. Non-specific binding proteins include albumin. The part of the total hormone concentration that is not bound to its respective specific carrier protein is the free part. As a result, testosterone which is not bound to SHBG is called free testosterone. Only the free amount of testosterone can bind to an androgenic receptor, which means it has biological activity. While a significant portion of testosterone is bound to SHBG, a small fraction of testosterone (1%-2%) is bound to albumin and the binding of testosterone to albumin is weak and can be reversed easily; as such, both albumin-bound and unbound testosterone are considered to be bioavailable testosterone. This binding plays an important role in regulating the transport, tissue delivery, bioactivity, and metabolism of testosterone. At the tissue level, testosterone dissociates from albumin and quickly diffuses into the tissues. The percentage of testosterone bound to SHBG is lower in men than in women. Both the free fraction and the one bound to albumin are available at the tissue level (their sum constitutes the bioavailable testosterone), while SHBG effectively and irreversibly inhibits the action of testosterone.
Sources: en.wikipedia.org
Mass spectrometry establishes whether the observed molecular weight matches the calculated sequence mass. Chromatographic retention and fragment mapping add further confidence about sequence and composition. A single technique alone is rarely treated as sufficient evidence of identity.
Dry powder is markedly more stable than solution and is usually held frozen and desiccated. Room temperature exposure over days degrades it more slowly than most people assume, but long-term integrity favors freezer storage. Light protection is recommended regardless of temperature.
Methods, columns, gradients, and detection wavelengths are not standardized across laboratories. Some figures describe only the main peak area at one wavelength and ignore water, salts, or counter-ions. Without stated conditions, comparing reported percentages across sources is unreliable.
No. It is a laboratory-made analog of growth hormone-releasing hormone. The natural hormone is a 44-residue peptide, while the analog is built on a shorter 29-residue fragment.