Everything below concerns cjc-1295. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2026-01-20. Where a claim depends on a specific study, the study is described rather than over-claimed.
Two forms circulate under the CJC-1295 name, and they differ by a single appended group. The version without a drug affinity complex carries four substitutions along the peptide chain, including a D-alanine near the amino terminus and replacements at three other positions. These changes block the enzyme dipeptidyl peptidase IV and remove a methionine residue that is prone to oxidation. The modified fragment is frequently labeled MOD GRF 1-29. Naming conventions are inconsistent across informal sources, which is a common source of confusion.
The second form adds a maleimide-bearing linker to the lysine at the carboxyl end. This group reacts with cysteine-34 on circulating serum albumin, forming a covalent bond that keeps the peptide in the bloodstream for far longer. ConjuChem developed the molecule as a way to extend the action of a peptide without frequent administration. The albumin attachment is the defining structural feature of the drug affinity complex version. Whether continuous exposure produces effects distinct from shorter pulses remains an unresolved research question.
Two related forms circulate in technical discussion under the same family name. The original version carries a drug affinity complex (DAC) that binds covalently to serum albumin after administration, and this linkage substantially extends circulation time. A second form, frequently written as modified GRF(1-29) or CJC-1295 without DAC, lacks that linker and clears much faster. The naming is a frequent source of confusion because the shorthand CJC-1295 can refer to either form depending on the source. Reports sometimes fail to specify which variant was studied.
The peptide backbone includes a D-alanine at position two, which resists cleavage by dipeptidyl peptidase IV, and several other substitutions that reduce degradation. Its molecular weight is roughly 3.4 kDa without the linker and about 3.6 kDa with it. The molecule is water soluble and is normally supplied as a lyophilized powder. Precise sequence and mass values depend on which variant is described, so technical documents usually state the exact form being referenced.
CJC-1295 is a synthetic peptide designed as a long-acting analogue of growth hormone-releasing hormone (GHRH). Its structure derives from the first 29 amino acids of native GHRH, a fragment often called GRF(1-29). Four substitutions were introduced to slow enzymatic breakdown and extend activity relative to the natural sequence. The compound was developed by ConjuChem as part of a broader effort to improve the pharmacokinetic profile of peptide hormones. It is studied in laboratory and clinical research settings rather than appearing as a naturally occurring substance.
| Property | Value | Notes |
|---|---|---|
| Molecular weight (no linker) | ~3.37 kDa | Calculated from peptide sequence |
| Molecular weight (with linker) | ~3.65 kDa | Includes albumin-binding moiety |
| Appearance | White to off-white powder | Typically lyophilized |
| Solubility | Soluble in water | Also dissolves in aqueous buffers |
| Common synonyms | Modified GRF(1-29), DAC:GRF | Usage varies by source |
Reported half-lives differ widely between the two variants and between species. Values for the albumin-binding form are usually expressed in days, while the unconjugated form is measured in minutes to a few hours. Sampling schedules, assay sensitivity, and route of administration all influence the numbers, which limits direct comparison across studies. Whether sustained receptor occupancy produces different downstream effects from pulsatile stimulation remains an open question in the published work. Claims about relative potency should therefore be read alongside the specific study design that produced them.
Lyophilised powder is the usual supplied form. The material is hygroscopic, so vials are typically equilibrated to room temperature before opening in order to prevent condensation on the contents. Long-term storage is generally described at minus twenty degrees Celsius or colder, protected from light and moisture. Repeated freeze-thaw cycles are avoided because they promote aggregation and loss of soluble material. A reconstituted solution is considerably less stable than the dry powder and is normally kept refrigerated for short periods only.
Identity and purity are assessed mainly by reversed-phase high-performance liquid chromatography combined with mass spectrometry. The chromatographic separation resolves the target peptide from truncation products and from species carrying oxidised residues, while mass measurement confirms the expected molecular mass. Because the two common variants differ by roughly 280 daltons, a mass determination distinguishes them unambiguously. Purity is often quoted as a percentage of total peak area, although that figure depends on the detection wavelength and the integration method applied.
Binding to GHRH receptors on pituitary somatotroph cells triggers cyclic AMP signaling and stimulates growth hormone synthesis and release. Because the peptide acts upstream of the pituitary, effects are mediated through endogenous growth hormone rather than direct receptor activation in peripheral tissues. Increases in insulin-like growth factor 1 are generally described as a downstream consequence. Most published human exposure data come from small early-stage studies, and the clinical significance of the pharmacokinetic profile remains incompletely characterized.
CJC-1295 is a synthetic analogue of growth hormone-releasing hormone, built on the 29-amino-acid GHRH(1-29) fragment. Four substitutions distinguish it from the natural sequence: D-alanine at position 2, glutamine at position 8, alanine at position 15, and leucine at position 27. These changes reduce enzymatic cleavage and extend the peptide's persistence in circulation. The compound is discussed in two forms, one carrying a drug affinity complex and one without it.
UR (Uitsluitend Recept): prescription only UA (Uitsluitend Apotheek): pharmacist only UAD (Uitsluitend Apotheek of Drogist): pharmacist or drugstore only AV (Algemene Verkoop): may be sold in general stores A drug that is UA may be sold OTC but only by pharmacists. The drug can be on the shelves like any other product. Examples are domperidone, 400 mg ibuprofen up to 50 tablets and dextromethorphan. A drug that is UAD can also be sold at drugstores which are stores where no prescription can be filled. The drugs are usually on the shelves, and the store also sells items like toys, gadgets, perfumes and homeopathic products. The drugs in this category have limited risk and addiction potential. Examples are naproxen and diclofenac in small amounts, cinnarizine, 400 mg ibuprofen up to 20 tablets and also 500 mg paracetamol up to 50 tablets. Drugs in the AV category can be sold at supermarkets, gas stations, etc. and include only drugs with minimal risk to the public, like paracetamol up to 20 tablets, 200 mg ibuprofen up to 10 tablets, cetirizine and loperamide.
== History and etymology == Bismuth was one of the first 11 metals to have been discovered. The name "bismuth" dates to around 1665 and is of uncertain etymology. The name possibly comes from German Bismuth, Wismut, Wissmuth (early 16th century), perhaps related to Old High German hwiz ("white"). The Neo-Latin bisemutium (coined by Georgius Agricola, who Latinized many German mining and technical words) is from the German Wismuth, itself perhaps from weiße Masse, meaning "white mass". The element was confused in early times with tin and lead because of its resemblance to those elements. Because bismuth has been known since ancient times, no one person is credited with its discovery. The Incas used bismuth (along with the usual copper and tin) in a special bronze alloy for knives, likely intentionally. Agricola (1546) states that bismuth is a distinct metal in a family of metals including tin and lead. This was based on observation of the metals and their physical properties. Miners in the age of alchemy also gave bismuth the name tectum argenti, or "silver being made" in the sense of silver still in the process of being formed within the Earth.
=== Superintelligence and the singularity === A superintelligence is a hypothetical agent that would possess intelligence far surpassing that of the brightest and most gifted human mind. If research into artificial general intelligence produced sufficiently intelligent software, it might be able to reprogram and improve itself. The improved software would be even better at improving itself, leading to what I. J. Good called an "intelligence explosion" and Vernor Vinge called a "singularity". In Artificial Intelligence: A Modern Approach, Russel and Norvig cast doubt on the possibility of a singularity, arguing that "so far, every technology has followed an S-shaped curve", and that "sometimes it is not possible to keep the growth going."
The team of inventors Edison employed at his laboratories in Menlo Park, New Jersey did, however, develop the first practical light bulb in 1880 (employing a carbonized bamboo filament), shortly prior to Joseph Swan, who invented an even more efficient bulb in 1881 (which used a cellulose filament). Henry Ford did not invent either the automobile or the assembly line. He did improve the assembly line process substantially, sometimes through his own engineering but more often through sponsoring the work of his employees, and he was the main person behind the introduction of the Model T, regarded as the first affordable automobile. Karl Benz (co-founder of Mercedes-Benz) is credited with the invention of the first modern automobile, and the assembly line has existed throughout history. Al Gore never said that he had "invented" the Internet. What Gore actually said was, "During my service in the United States Congress, I took the initiative in creating the Internet", in reference to his political work towards developing the Internet for widespread public use. Gore was the original drafter of the High Performance Computing and Communication Act of 1991, which provided significant funding for supercomputing centers, and this in turn led to upgrades of a major part of the already-existing early 1990s Internet backbone, the NSFNet, and development of NCSA Mosaic, the browser that popularized the World Wide Web.
Sources: en.wikipedia.org
== Endogenous synthesis == Insulin-like growth factor 1 (IGF-1) is a hormone that is structurally very similar to insulin and mediates the effects of growth hormone (GH) thus affecting metabolism, regeneration, and overall development. The GH-IGF-1 signaling pathway is crucial in the process of vascular remodeling and angiogenesis, i.e., the process of building new blood vessels and thus, helps in maintaining blood circulation in the body. In the brain, IGF-1 is abundant in various cells and regions and research over the years, suggest an imperative role of IGF-1 activity in neurodevelopment making it critical in learning and memory. The IGF-1 family comprises
== Histology == The chief cells are organized as dense cords surrounding the capillaries in the parathyroid. Parathyroid chief cells make up the majority of the parathyroid gland along with adipocytes and oxyphil cells. Parathyroid chief cells have large amounts of organelles associated with protein synthesis. As in many endocrine organs, with age, more oxyphil cells appear in the parathyroid gland. Parathyroid tissue seems to have a low turn-over rate. Chief cells appear as a dark purple in an H&E stain, with the oxyphil cells staining as a lighter pink. They are polygonal in shape with a round nucleus. Chief cells spend most time inactive due to normal calcium level conditions. These inactive cells are classified as cuboidal. They have low levels of secretory granules, as opposed to active chief cells. These granules can contain acid phosphatase. Acid phosphatase is only found in larger secretory granules, 400 to 900 nm in diameter, and is less prevalent in smaller granules. This acid phosphatase is also present in the Golgi apparatus of the chief cell. However, the Golgi apparatus areas associated with parathyroid hormone packaging contained little or no acid phosphatase. The chief cells become active in response to low calcium in the blood. The low level is sensed by the calcium- sensing receptor. These active cells have a greater electron density than the inactive chief cells. The electron density is caused by the secretory granules. The chief cell is thought to have a clear cytoplasm.
==== Marquez: The Wannabe B-Boy ==== Meet Marquez, a street fighter who makes life miserable for twins Richard and Edward. Mayhem brings in Brazilian jiu-jitsu specialist, Quinn Mulhern standing at 6'3 and weighing in at 177 lbs, with a record of 14 wins and 1 loss to put him in his place. This episode has never aired on American TV and is not available on the Bully Beatdown website like most other episodes. The episode has been aired in the Netherlands, the Fox8 channel of Foxtel and Austar in Australia, and MTV Latin America. Many have speculated that the bully winning more money is the reason why it was never broadcast in America.
== Health claims == By the early 2010s, "bone broth" had become a popular health food trend, due to the resurgence in popularity of dietary fat over sugar, and interest in "functional foods" to which "culinary medicinals" such as turmeric and ginger could be added. Bone broth bars, bone broth home delivery services, bone broth carts, and bone broth freezer packs grew in popularity in the United States. The fad was heightened by the 2014 book Nourishing Broth, in which authors Sally Fallon Morell and Kaayla T. Daniel claim that the broth's nutrient density has a variety of health effects. There is no scientific evidence to support many of the claims made for bone broth.
=== Specialized training methods === Altitude training Ballistic training Boxing training Circuit training Complex training Cross training Endurance training Long slow distance Grip strength training Interval training Plyometrics (jump training) Power training Strength training High-intensity training Suspension training Weight training Resistance training Training to failure
Sources: en.wikipedia.org
== History and development == A recipe for cream soda written by E. M. Sheldon and published in Michigan Farmer in 1852 called for water, cream of tartar (potassium bitartrate), Epsom salts, sugar, egg, and milk to be mixed, then heated, then mixed again once cooled with water and a quarter teaspoonful of baking soda to make an effervescent drink. It was suggested as a temperance drink preferable to those of "Uncle Bacchus" and in compliance with the recently introduced Maine law. An alternative recipe can be found combining a soda of choice as well as whipped cream. Alexander C. Howell of Vienna, New Jersey, was granted a patent for "cream soda-water" on June 27, 1865. Howell's cream soda-water was made with sodium bicarbonate, water, sugar, egg whites, wheat flour, and "any of the usual flavoring materials—such as oil of lemon, extracts of vanilla, pine-apple, to suit the taste". Before drinking, the cream soda-water was mixed with water and an acid, such as tartaric acid or citric acid. In Canada, James William Black of Berwick, Nova Scotia, was granted a U.S. patent on December 8, 1885, and a Canadian patent on July 5, 1886, for "ice-cream soda". Black's ice-cream soda, which contained whipped egg whites, sugar, lime juice, lemons, citric acid, flavoring, and bicarbonate of soda, was a concentrated syrup that could be reconstituted into an effervescent beverage by adding ordinary ice water. In the United States, Ugo H. Sodini helped to pioneer in the creation of vanilla cream soda.
=== Additional instar === Two populations of C. brunneus have females that have an additional instar inserted between instar II and III termed instar IIa. Morphological characteristics of instar IIa are a mixture of instars II and III. Females are of an intermediate size and length between instars II and III. Wing buds closely resemble the wing buds of instar II but have more venation than the typical wing buds of instar II. Genitalia development is closer to the development of instar III development. Additional instars have been found in other acridid species that display sexual dimorphism in which females are larger than males such as C. parallelus. C. brunneus females on average are 3 to 4 times larger than males. The occurrence of the additional instar most likely reflects the habitat the C. brunneus females occur. Females with the additional instar have only been found to occur in the region of East Anglia in Britain. The longer summers in East Anglia may facilitate earlier hatching and an increased growth rate permitting the inclusion of instar IIa allowing the females to reach a larger size. Decreased availability of food may encourage rapid development also explaining the inclusion of an additional instar.
William T. G. Morton participated in a public demonstration of ether anesthesia on October 16, 1846, at the Ether Dome in Boston, Massachusetts. Morton had called his ether preparation, with aromatic oils to conceal its smell, "Letheon" after the Lethe River (Λήθη, meaning "forgetfulness, oblivion"). However, Crawford Williamson Long is now known to have demonstrated its use privately as a general anesthetic in surgery to officials in Georgia, as early as March 30, 1842, and Long publicly demonstrated ether's use as a surgical anesthetic on six occasions before the Boston demonstration. British doctors were aware of the anesthetic properties of ether as early as 1840 where it was widely prescribed in conjunction with opium. Diethyl ether was initially controversial among physicians, in part because Morton patented his discovery, which went against medical ethics at the time. Diethyl ether was preferred by some practitioners over chloroform as a general anesthetic due to ether's more favorable therapeutic index, that is, a greater difference between an effective dose and a potentially toxic dose. Diethyl ether does not depress the myocardium but rather it stimulates the sympathetic nervous system leading to hypertension and tachycardia. It is safely used in patients with shock as it preserves the baroreceptor reflex. Its minimal effect on myocardial depression and respiratory drive, as well as its low cost and high therapeutic index allows it to see continued use in developing countries.
Pentachlorophenol (PCP) is an organochlorine compound used as a pesticide and a disinfectant. First produced in the 1930s, it is marketed under many trade names. It can be found as pure PCP, or as the sodium salt of PCP, the latter of which dissolves easily in water. It can be biodegraded by some bacteria, including Sphingobium chlorophenolicum.
Heart failure characteristically involves increased catecholamine activity on the heart, which is responsible for several deleterious effects, including increased oxygen demand, propagation of inflammatory mediators, and abnormal cardiac tissue remodeling, all of which decrease the efficiency of cardiac contraction and contribute to the low ejection fraction. Beta blockers counter this inappropriately high sympathetic activity, eventually leading to an improved ejection fraction, despite an initial reduction in ejection fraction. Trials have shown beta blockers reduce the absolute risk of death by 4.5% over a 13-month period. In addition to reducing the risk of mortality, the numbers of hospital visits and hospitalizations were also reduced in the trials. A 2020 Cochrane review found minimal evidence to support the use of beta blockers in congestive heart failure in children, however did identify that from the data available, that they may be of benefit. Therapeutic administration of beta blockers for congestive heart failure ought to begin at very low doses (1⁄8 of target) with a gradual escalation of the dose. The heart of the patient must adjust to decreasing stimulation by catecholamines and find a new equilibrium at a lower adrenergic drive.
Sources: en.wikipedia.org
No. It is a synthetic analogue modeled on the first 29 residues of human GHRH. The substitutions and any linker are laboratory modifications rather than features of the endogenous peptide.
Early development used the albumin-binding form, and a shorter variant was later discussed under the same label. Because the two differ in half-life and handling, ambiguity arises whenever a source omits the variant designation.
The compound derives from that fragment but is not identical to it. The parent fragment lacks the stabilizing substitutions, so its degradation rate and duration of action differ noticeably.
Chromatography reports how much material elutes as a single peak but does not confirm what that material is. Mass spectrometry supplies the molecular mass, which is characteristic of a given sequence and its modifications. Together the two methods support both a purity figure and an identity claim.