BPC-157 is one of those subjects where the details matter more than the headlines. This page pulls together the background, the mechanisms, and the practical points readers ask about most.
Last reviewed on 2026-07-15. Where a claim depends on a specific study, the study is described rather than over-claimed.
Analytical results depend on the column, gradient, and detector wavelength chosen by the laboratory, so purity values from different sources are not always directly comparable. Water content, counterion form, and residual trifluoroacetate affect both mass and purity calculations. Microbiological and endotoxin testing are separate from chemical purity and are not covered by a standard chromatographic run. Buyers evaluating a material typically request the full method description rather than a single purity figure.
Lyophilized peptide powder is generally stored at minus twenty degrees Celsius or lower and kept away from light and moisture. Under these conditions degradation is slow, and sealed vials remain stable for extended periods. Once dissolved, the material is less stable, particularly in aqueous buffers near neutral pH, where hydrolysis and oxidation proceed faster. Solutions are usually kept cold and used within days to weeks. Repeated freeze-thaw cycles are avoided because they encourage aggregation.
Terminology in the literature is not fully standardised. Papers and product listings use BPC-157, BPC 157, and the longer phrase stable gastric pentadecapeptide BPC 157 interchangeably, and synonyms such as bepecin or PL 14736 appear in older or company-linked publications. Purity claims and reported masses can also differ between sources because peptide preparations may include counterions, residual solvents, or bound water. This variability complicates direct comparison of results across studies and makes the exact identity and grade of a given sample worth verifying. Discussions of the compound should therefore specify the source, salt form, and stated purity where those are known.
BPC-157 is a synthetic peptide composed of fifteen amino acid residues, with the sequence Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val. Its name derives from body protection compound, a term used for a protein fraction identified in human gastric juice. Researchers in Zagreb first reported the pentadecapeptide in the early 1990s and described it as a stable fragment of that larger protein. The compound is also catalogued as PL 14736 and, in some commercial contexts, as bepecin. Its molecular formula is C62H98N16O22 and its monoisotopic mass is approximately 1419 daltons.
Most published work on BPC-157 consists of preclinical studies, including rodent models of tissue injury, gastrointestinal lesions, and vascular or tendon damage, together with in vitro cell assays. Reviews frequently note that the mechanisms proposed in these papers remain incompletely characterised and that findings have not been confirmed in large randomised human trials. The compound is widely sold as a research chemical rather than a licensed medicine, and labels commonly carry a statement that it is not for human use. Whether any of the reported animal effects translate to humans is an open question rather than an established result.
| Property | Value | Notes |
|---|---|---|
| Appearance | white to off-white powder | lyophilized form |
| Typical purity | 95 percent or higher by RP-HPLC | value depends on method |
| Storage temperature | minus 20 degrees Celsius or below | desiccated, protected from light |
| Reconstitution solvent | bacteriostatic water | sterile saline also used |
| Primary assay | RP-HPLC with UV detection | often paired with mass spectrometry |
Supplied material is typically a lyophilized white to off-white powder. The peptide is freely soluble in water and in common aqueous buffers, which allows it to be handled as a stock solution. Because the sequence contains no cysteine, disulfide cross-linking is not a route of degradation. The absence of aromatic residues means ultraviolet absorbance at 280 nm is minimal, so quantification usually relies on peptide bond absorbance near 214 nm or on amino acid analysis.
Common synonyms in catalogs include pentadecapeptide BPC 157, BPC157, and the full sequence name. A CAS registry number in the 137525-51-0 range is frequently listed, though the assignment should be verified against the supplier certificate of analysis. The name itself is not a pharmacopoeial designation, and there is no standardized international nonproprietary name. Distinguishing genuine material from related fragments generally requires mass spectrometry, since several truncated sequences share similar chromatographic behavior.
BPC-157 is a synthetic pentadecapeptide whose sequence is commonly given as Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val. It is described in the literature as a fragment of a larger protein found in human gastric juice, referred to as body protection compound. The peptide was first characterized in the early 1990s by a research group in Zagreb, Croatia. Its molecular formula is C62H98N16O22 and its monoisotopic mass is approximately 1419 daltons.
A freeze-dried sample is generally the most stable form and is commonly held at minus twenty degrees Celsius or lower for long-term keeping, with brief transfers at room temperature. The solid is hygroscopic, so vials are warmed to ambient temperature before opening to prevent condensation from degrading the contents. Light exposure and repeated temperature cycling are both avoided in routine handling. Storage over a desiccant is a common laboratory practice that limits moisture uptake during repeated access.
Once dissolved, the material is considerably less stable than the dry solid. Aqueous solutions are usually kept cold and used within a short window, and neutral or mildly acidic buffers are preferred over strongly alkaline conditions. Freeze-thaw cycles promote aggregation and loss of material to container surfaces, so dividing a batch into single-use aliquots is standard. Adsorption to plastic and glass can lower the measured concentration, meaning solution strength may need rechecking before an experiment.
The main chemical liabilities of this sequence are peptide-bond hydrolysis and possible aspartate-related reactions, since the peptide contains aspartic acid residues but no cysteine, methionine, or tryptophan. Absence of those three residues removes the most common oxidation and disulfide pathways from consideration. Studies of related peptides indicate that aspartate isomerisation and aspartimide formation occur most readily at Asp-Gly and Asp-Ala positions, and open questions remain about how quickly those reactions proceed under ordinary laboratory conditions. Storage guidance typically emphasises cool, dry, dark conditions to slow hydrolysis.
Identity and purity are usually assessed with reversed-phase high-performance liquid chromatography, often paired with mass spectrometry using electrospray or MALDI ionisation. Amino acid analysis and peptide mapping by enzymatic digestion provide additional sequence-level confirmation. Purity is commonly reported as an area percentage from a chromatographic trace, and water content can be measured by Karl Fischer titration. Reported masses may differ by tens of daltons between sources because preparations can contain acetate or trifluoroacetate counterions, and such differences are not by themselves evidence of a different peptide.
BPC-157 is normally distributed as a lyophilised powder that ranges from white to off-white in appearance. The peptide dissolves readily in water, normal saline, and common aqueous buffers, and it is poorly soluble in nonpolar solvents such as hexane or vegetable oils. Lyophilised vials take up moisture if left open, which changes the mass of powder in the container and complicates any later weighing. Because the material is handled in small quantities, static and adhesion to glass or plastic can also cause noticeable losses during transfer.
=== Durability === Mid-term durability from ESG appears promising. A total body weight loss of 17% and excess weight loss of between approximately 60-67% was observed to be sustained at 18–24 months. This was later confirmed in the multicenter, randomized controlled MERIT study, which observed that 68% of subjects who underwent an ESG maintained 25% or more of their excess weight loss at two years. As a novel therapy, ESG presently lacks studies assessing long-term durability, though more data on this component of ESG are anticipated as more ESGs are performed over time. One recent study observed at 5 years from ESG that at least 10% total body weight loss was maintained in 90% of patients and at least 15% total body weight loss was maintained in 61% of patients.
=== Denaturing-condition electrophoresis === Gel electrophoresis is a common laboratory technique that can be used both as a preparative and analytical method. The principle of electrophoresis relies on the movement of a charged ion in an electric field. In practice, the proteins are denatured in a solution containing a detergent (SDS). In these conditions, the proteins are unfolded and coated with negatively charged detergent molecules. The proteins in SDS-PAGE are separated on the sole basis of their size. In analytical methods, the protein migrate as bands based on size. Each band can be detected using stains such as Coomassie blue dye or silver stain. Preparative methods to purify large amounts of protein, require the extraction of the protein from the electrophoretic gel. This extraction may involve excision of the gel containing a band, or eluting the band directly off the gel as it runs off the end of the gel. In the context of a purification strategy, denaturing condition electrophoresis provides an improved resolution over size exclusion chromatography, but does not scale to large quantity of proteins in a sample as well as the late chromatography columns.
==== Glazes ==== Uranium pigments are used to color ceramic tiles with uranium glazes (red, yellow, brown), where 2 mg of uranium per cm2 is allowed. Between 1900 and 1943, large quantities of uranium-containing ceramics were produced in the United States, as well as in Germany and Austria. It is estimated that between 1924 and 1943, 50-150 tons of uranium (V,VI) oxide were used annually in the U.S. to produce uranium-containing glazes. In 1943, the U.S. government imposed a ban on the civilian use of uranium-containing substances, which remained in effect until 1958. Beginning in 1958, the U.S. government, and in 1969 the United States Atomic Energy Commission, sold depleted uranium in the form of uranium(VI) fluoride for civilian use. In Germany, uranium-glazed ceramics were produced by the Rosenthal porcelain factory and were commercially available until the early 1980s. Uranium-glazed ceramics should only be used as collector's items and not for everyday use due to possible abrasion.
In order to regulate the secretion of ACTH, many substances secreted within this axis exhibit slow/intermediate and fast feedback-loop activity. Glucocorticoids secreted from the adrenal cortex work to inhibit CRH secretion by the hypothalamus, which in turn decreases anterior pituitary secretion of ACTH. Glucocorticoids may also inhibit the rates of POMC gene transcription and peptide synthesis. The latter is an example of a slow feedback loop, which works on the order of hours to days, whereas the former works on the order of minutes. The half-life of ACTH in human blood is reported to be between ten and 30 minutes.
== Medical uses == Pindolol is used for hypertension in the United States, Canada, and Europe, and also for angina pectoris outside the United States. When used alone for hypertension, pindolol can significantly lower blood pressure and heart rate, but the evidence base for its use is weak as the number of subjects in published studies is small. In some countries, pindolol is also used for arrhythmias and prophylaxis of acute stress reactions. It has been used to treat anxiety as well.
Sources: en.wikipedia.org
an organ's blood flow. Each organ will have its own specific clearance conditions, which will relate to its mode of action. The «renal clearance» rate will be determined by factors such as the degree of plasma protein binding as the drug will only be filtered out if it is in the unbound free form, the degree of saturation of the transporters (active secretion depends on transporter proteins that can become saturated) or the number of functioning nephrons (hence the importance of factors such as kidney failure). As «hepatic clearance» is an active process it is therefore determined by factors that alter an organism's metabolism such as the number of functioning hepatocytes, this is the reason that liver failure has such clinical importance.
The endocrine glands belong to the body's control system. The hormones which they produce help to regulate the functions of cells and tissues throughout the body. Endocrine organs are activated to release their hormones by humoral, neural, or hormonal stimuli. Negative feedback is important in regulating hormone levels in the blood. The nervous system, acting through hypothalamic controls, can in certain cases override or modulate hormonal effects.
=== Small intestinal submucosa === Small intestinal submucosa (SIS) is submucosal tissue in the small intestines of vertebrates. SIS is harvested (typically from pigs) for transplanted structural material in several clinical applications, typically biologic meshes. They have low immunogenicity. Some uses under investigation include a scaffold for intervertebral disc regeneration. Unlike other scaffold materials, the resorbable SIS extracellular matrix (SIS-ECM) scaffold is replaced by well-organized host tissues, including differentiated skeletal muscle.
Lorazepam, sold under the brand name Ativan among others, is a medication of the benzodiazepine and depressant category. It inhibits activity of the central nervous system, and has anxiolytic and hypnotic effects. It is indicated for the short term treatment of anxiety (including anxiety disorders), insomnia, severe agitation, active seizures including status epilepticus, alcohol withdrawal, and chemotherapy-induced nausea and vomiting. It is also used during surgery to interfere with memory formation, to sedate those who are being mechanically ventilated, and, along with other treatments, for acute coronary syndrome due to cocaine use. It can be given orally (by mouth), transdermally (on the skin via a topical gel or patch), intravenously (injection into a vein), or intramuscularly (injection into a muscle). When given by injection, onset of effects is between one and thirty minutes and effects last for up to a day. Common side effects include weakness, sleepiness, dizziness, decreased alertness, decreased memory formation, low blood pressure, and a decreased effort to breathe. When given intravenously, the person is typically closely monitored. Among those who are depressed, there may be an increased risk of suicide. Drug tolerance may occur, especially after long-term use, where increasingly larger doses are required to achieve the same effect. Its use is highly liable to physical dependence and psychological dependence, and sudden stop after long-term use can cause symptoms of benzodiazepine withdrawal. Older people more often develop adverse effects.
Sources: en.wikipedia.org
Bacteriostatic water or sterile saline is commonly used to dissolve the powder. The choice of solvent affects stability and preservation. Aqueous solutions are kept refrigerated and are not intended for long-term storage.
Most suppliers state a purity of ninety-five percent or higher by reversed-phase chromatography. Values below that threshold indicate a larger proportion of related peptides. The reported figure depends on the detection wavelength, usually 214 nanometers for peptides.
Sealed vials kept cold and dry retain potency for years in many cases. Exposure to warmth or moisture accelerates degradation. A stated expiration date is a supplier estimate rather than a measured endpoint.
BPC-157 is a synthetic fifteen-amino-acid peptide whose sequence corresponds to a fragment of a protein found in human gastric juice. It is studied mainly in preclinical research and is not an approved pharmaceutical product in major markets. Materials sold for laboratory use are typically labelled as research chemicals.