If you have been reading about evidence gap and want a single page that covers the useful parts, this is it: definitions, context, how it is studied, and the questions that come up repeatedly.
Last reviewed on 2026-01-09. Where a claim depends on a specific study, the study is described rather than over-claimed.
Within the research literature, the peptide is discussed through several provisional mechanisms, including cytoprotection, modulation of growth factor signaling, and interaction with the nitric oxide system. None of these mechanisms is fully characterized, and no single pathway is universally accepted. Review articles typically note the gap between consistent animal findings and sparse human evidence. The compound is classified as a research chemical rather than an approved pharmaceutical, which shapes how studies are designed, funded, and reported.
BPC-157 is a synthetic pentadecapeptide with the sequence GEPPPGKPADDAGLV, corresponding to a partial fragment of a larger protein detected in human gastric juice. The name derives from the parent protein designation BPC, an abbreviation of body protection compound, with 157 acting as a fraction or batch identifier used by the original investigators. Its molecular weight is approximately 1419 daltons, and the chain contains no unusual residues or disulfide bridges. In the literature it is described as a short, water-soluble fragment rather than a complete natural protein.
Proposed mechanisms include interaction with the nitric oxide system, modulation of growth factor signaling, and effects on blood vessel formation. None of these has been established as the primary mode of action, and some proposed pathways rest on indirect measurements. Whether the reported effects depend on a specific receptor has not been determined. Stability in gastric acid, unusual for a peptide of this size, is also reported in animal work, but the reason for it is not firmly established.
Published studies on BPC-157 are dominated by animal models. Commonly used endpoints include healing of surgically induced lesions in the stomach, tendon-to-bone attachment after transection, and recovery from experimentally induced vascular or intestinal damage. Many of these reports come from a small number of research groups, and the peptide is often described as acting across a wide range of tissue types. That breadth is itself a point of discussion, since one molecule influencing many unrelated systems is unusual.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C62H98N16O22 | computed for the free peptide |
| Molecular weight | about 1419 Da | monoisotopic mass near 1418.7 |
| Amino acid count | 15 | single chain, no disulfide bonds |
| Solubility | freely soluble in water | also dissolves in saline and phosphate buffer |
| Common synonyms | pentadecapeptide BPC, BPC 157 | fragment notation varies by source |
Most published work on BPC-157 comes from animal experiments rather than controlled human trials. Rodent models have examined its effects on gastrointestinal lesions, tendon and ligament injury, and blood vessel formation. These studies are often small and originate from a limited number of research groups, which affects how broadly the findings can be generalized. No large randomized human trial has been reported in the peer-reviewed literature. Discussion of the compound therefore rests largely on preclinical data, and questions about its effects in people remain open rather than settled.
Several mechanisms have been proposed to explain the activity observed in animal models. The most frequently cited involve signaling through vascular endothelial growth factor receptor 2 and modulation of the nitric oxide system. Researchers have also described interactions with protective pathways in the gut lining. These proposed mechanisms appear in the literature as hypotheses supported by preclinical observations, not as confirmed pathways in humans. The precise way the peptide produces its reported effects, and whether those effects carry across species, remain areas of active and unresolved investigation.
BPC-157 is a synthetic pentadecapeptide, meaning it consists of fifteen amino acids joined in a single chain. Its sequence is Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val, a fragment corresponding to part of a larger protein found in human gastric juice. The peptide was first described in the 1990s by researchers in Zagreb who were studying gastric protective factors. It is not a naturally circulating hormone; it is a laboratory-made fragment derived from a stomach protein. The name is an abbreviation of body protection compound, with the number referring to the fragment's position in the source protein.
Identity and purity are usually assessed by reversed-phase high-performance liquid chromatography with ultraviolet detection near 214 nanometers, a wavelength that captures the peptide backbone. The main peak area is reported as a percentage of total peak area, which serves as a conventional purity figure. Mass spectrometry provides an independent check on molecular mass and helps confirm the expected sequence. Additional tests may include amino acid analysis and water content determination. Results are only comparable when the same column, gradient, and detection settings are used.
Peptides are susceptible to hydrolysis, oxidation, and aggregation, and BPC-157 is no exception. The lyophilized powder form is generally more stable than a solution because residual moisture is low and molecular mobility is reduced. Once dissolved, the peptide is exposed to water, oxygen, and trace metal ions that accelerate degradation. Light exposure and repeated freeze-thaw cycles are also commonly cited as sources of loss. These general principles guide most handling recommendations found in supplier documentation.
The peptide was first described in the early 1990s by a group studying gastric secretions and tissue repair. Its fifteen-residue chain is usually written as GEPPPGKPADDAGLV in single-letter code. The free peptide has the formula C62H98N16O22 and a theoretical mass near 1419.5 daltons. These identifiers are established chemical facts that can be checked against standard peptide databases. There is no ambiguity about the primary structure.
Most published findings come from rodent experiments using induced injury or surgical models. Human reports remain scarce and are largely observational, which limits how much can be stated with confidence. Questions about absorption, distribution, metabolism, and clearance in people are still open. Dose translation between species is likewise unresolved. Researchers tend to read the animal literature as a starting point rather than a settled account.
BPC-157 is a synthetic peptide of fifteen amino acids, written in single-letter code as GEPPPGKPADDAGLV. The sequence corresponds to a partial fragment of a protein isolated from human gastric juice, described in early reports as body protection compound. The number 157 refers to a fragment designation in that work rather than to molecular mass. Initial descriptions appeared in the early 1990s, when the fragment was reported to protect gastrointestinal tissue in animal models. Commercial material is produced by solid-phase peptide synthesis rather than extracted from biological sources.
Laboratory research on this peptide has examined a wide and heterogeneous set of endpoints, including gastric ulcer models, tendon and ligament injury, wound closure, and intestinal inflammation. Most published findings come from rodent studies, and reported effect sizes are often large relative to controls. Because the compound has been tested across many unrelated injury models, the literature is frequently described as unusually broad for a single peptide. A substantial share of this work originates from a small number of research groups, which matters when assessing how widely results have been reproduced.
He noted its use in Ancient Rome in religious ceremonies to purify homes by fumigation (something also briefly evoked in a line of Ovid's Ars Amatoria about purifying houses with eggs and sulfur). The use of sulfur for fumigation is very ancient and was already a practice in preclassical Greece; this is mentioned in the Odyssey. Several Roman authors of the second half of the first century, such as Martial and Statius, reference a type of street trade seemingly common at the time, where peddlers in the streets would exchange pieces of sulfur or sulfur "matches" (actually some kind of sulfured wooden splints used as a fire starter, rather than friction matches) for broken glass. The Persian army used sulfur as a chemical weapon during the siege of Dura-Europos, in the 3rd century. They burned pitch and sulfur in tunnels, creating a toxic cloud of sulfur dioxide which killed the Roman soldiers in the tunnels. A natural form of sulfur known as shiliuhuang (Chinese: 石硫黃; pinyin: shí liú huáng) was known in China since the 6th century BC and found in Hanzhong. By the 3rd century, the Chinese had discovered that sulfur could be extracted from pyrite. Chinese Daoists were interested in sulfur's flammability and its reactivity with certain metals, yet its earliest practical uses were found in traditional Chinese medicine.
Bin Laden's 1996 fatwa, in addition to similar statements that called for the killing of Americans, are seen by investigators as evidence of his motivation for the attacks. In a second fatwa in 1998, he outlined more of his objections to American foreign policy, such as American support of Israel and the U.S. and other nations' sanctions against Iraq, condemning the "protracted blockade." He claimed that the U.S. was being directed by an international Jewish conspiracy into killing as many Muslims as possible, and that all Muslims must wage a defensive war against the U.S. This was to be done until the aggression against them ceased. Bin Laden further claimed it would send a message to the American people, forcing the U.S. to reevaluate its policies. In a 1998 interview with American journalist John Miller, he stated:
A modern example of the study of solvent effects on chemical equilibrium can be seen in a study of the epimerization of chiral cyclopropylnitrile Grignard reagents. This study reports that the equilibrium constant for the cis to trans isomerization of the Grignard reagent is much greater—the preference for the cis form is enhanced—in THF as a reaction solvent, over diethyl ether. However, the faster rate of cis-trans isomerization in THF results in a loss of stereochemical purity. This is a case where understanding the effect of solvent on the stability of the molecular configuration of a reagent is important with regard to the selectivity observed in an asymmetric synthesis.
Carisoprodol is meant to be used along with rest, physical therapy, and other measures to relax muscles after strains, sprains, and muscle injuries. It comes in tablet format and is taken by the mouth three times a day and before bed.
=== By other insects === Honey bees are not the only eusocial insects to produce honey. All non-parasitic bumblebees and stingless bees produce honey. Some wasp species, such as Brachygastra lecheguana and Brachygastra mellifica, found in South and Central America, are known to feed on nectar and produce honey. Other wasps, such as Polistes versicolor, also consume honey. In the middle of their life cycles they alternate between feeding on protein-rich pollen and feeding on honey, which is a far denser source of food energy.
Sources: en.wikipedia.org
=== 1925: White Castle Official House Organ, success, expansion and imitators === The company also began publishing its own internal employee magazine, the White Castle Official House Organ, circa November 1925 (it was originally named The Hot Hamburger). The bulk of the material was contributed by company personnel and consisted mostly of letters and photographs of workers, promotional announcements, 25-year milestones, retirements, and similar items of interest arranged by geographic area. "Employees could... read about the progress and innovations made by those in other areas which made everyone aware of the entire system's direction and condition." The White Castle Official House Organ was published quarterly at least through the early 1980s, and at some point was renamed The Slider Times. The Ohio History Connection houses an extensive archive of White Castle System, Inc. records from 1921 to 1991, including issues dating from 1927 to 1970 of the White Castle Official House Organ.
=== University of Oxford === Despite his success in revitalising the pathology department at Sheffield, Florey had grander ambitions than following the example of Douglas and dying in office. An opportunity arose with the death of Georges Dreyer on 17 August 1934, the holder of the chair of pathology in the Sir William Dunn School of Pathology at Oxford. Dreyer had overseen the construction of a palatial new laboratory, but by 1934 it had attracted few students and researchers. While Florey had reservations about leaving Sheffield for Guy's, he had none about Oxford. The electoral board met on 22 January 1935, and Florey was appointed Professor of Pathology and Fellow of Lincoln College, Oxford, which controlled the chair, effective 1 May 1935. The chair came with an annual salary of £1,700 (equivalent to £105,000 in 2025). The school's budget was £3,432 a year (equivalent to £211,000 in 2025) for all equipment and salaries except Florey's. He enforced strict economy measures such as forbidding the use of the lift, which saved £25 a year.
These adenylyl cyclases are toxins secreted by pathogenic bacteria such as Bacillus anthracis, Bordetella pertussis, Pseudomonas aeruginosa, and Vibrio vulnificus during infections. These bacteria also secrete proteins that enable the AC-II to enter host cells, where the exogenous AC activity undermines normal cellular processes. The genes for Class II ACs are known as cyaA, one of which is anthrax toxin. Several crystal structures are known for AC-II enzymes.
"Chelating agents are organic compounds which are capable of linking to metal ions". They are usually useful for removing toxic heavy metal ions from body. Dimercaprol is a common chelating agent to treat toxic exposure to arsenic, mercury, gold, and lead. It is in the chelating class of drugs. From Figure 3, the SH-ligands of dimercaprol can compete with -SH groups in natural enzymes for heavy metal, forming a stable metal complex to be excreted through urine. The action antagonises the toxic metal ions and helps remove them from body circulation. However, dimercaprol has a narrow TI and is later replaced by its derivative, 2,3-dimercaptosuccinic acid (DMSA). Neutralising antibodies block pathogen entry into cells to prevent further infection and replication. Infliximab is a monoclonal antibody binding with tumour necrosis factor-alpha (TNF-alpha), inhibiting its pro-inflammatory action. Its efficacious anti-inflammatory action is clinically used in Crohn's Disease, active rheumatoid arthritis, psoriatic arthritis, and active ankylosing spondylitis.
Sources: en.wikipedia.org
11 December – Researchers demonstrate the use of biological-electronic hybrid Organoid Intelligence, 'Brainoware' (see 1 March), for speech recognition. 12 December – Asteroid 319 Leona occults the bright star Betelgeuse for about 12 seconds as viewed on a narrow path from China to Mexico. 13 December Scientists report that the contents of the sample-return mission of the OSIRIS-REx mission to asteroid Bennu revealed organic molecules as well as unknown materials which require more study to have a better idea of their composition and makeup. The smallest known brown dwarf, weighing just three to four times the mass of Jupiter, is discovered in star cluster IC 348 by astronomers using the James Webb Space Telescope.
=== Insects === Order Blattodea Blattella germanica, German cockroach (2018) Periplaneta americana, American cockroach (2018) Zootermopsis nevadensis, a dampwood termite (2014 Cryptotermes secundus, a drywood termite(2018) Macrotermes natalensis, a higher termite (2014 Order Coleoptera Dendroctonus ponderosae Hopkins, beetle (mountain pine beetle) (2013) Aquatica lateralis, Japanese aquatic firefly "Heike-botaru" (firefly) (2018) Photinus pyralis, Big Dipper firefly (2018) Protaetia brevitarsis, White-spotted flower chafer (2019) Tribolium castaneum Strain:GA-2, beetle (red flour beetle) (2008) Allomyrina dichotoma, Japanese rhinoceros beetle (2022) Pachyrhynchus sulphureomaculatus, Easter Egg Weevil (2021) Order Collembola Family Isotomidae Desoria tigrina, (2021) Family Sminthurididae Sminthurides aquaticus, (2021) Order Diptera Family Calliphoridae Aldrichina grahami, Forensic blowfly (2020) Family Chironomidae Dasypogon diadema, Hunting Robber fly (2019) Parochlus steinend, Antarctic winged midge (2017) Proctacanthus coquilletti, Assassin fly (2017) Family Culicidae (mosquitoes) Aedes aegypti Strain:LVPib12, mosquito (vector of dengue fever, etc.) (2007) Aedes albopictus (2015) Anopheles darlingi Anopheles gambiae Strain: PEST, mosquito (vector of malaria) (2002) Anopheles gambiae Strain: M, mosquito (vector of malaria) (2010) Anopheles gambiae Strain: S, mosquito (vector of malaria) (2010) Anopheles sinensis, mosquito (vector of vivax malaria, lymphatic filariasis and Setaria infections), (2014) Anopheles stephensii Anopheles arabiensis (2015) Anopheles quadriannulatus (2015) Anopheles merus (2015) Anopheles melas (2015) Anopheles christyi (2015) Anopheles epiroticus (2015) Anopheles maculatus (2015) Anopheles culicifacies (2015) Anopheles minimus (2015) Anopheles funestus (2015, 2019) Anopheles dirus (2015) Anopheles farauti (2015) Anopheles atroparvus (2015) Anopheles sinensis (2015) Anopheles albimanus (2015) Culex quinquefasciatus, mosquito (vector of West Nile virus, filariasis etc.) (2010) Family Drosophilidae (fruit flies) Drosophila albomicans, fruit fly (2012) Drosophila ananassae, fruit fly (2007) Drosophila biarmipes, fruit fly (2011) Drosophila bipectinata, fruit fly (2011) Drosophila erecta, fruit fly (2007) Drosophila elegans, fruit fly (2011) Drosophila eugracilis, fruit fly (2011) Drosophila ficusphila, fruit fly (2011) Drosophila grimshawi, fruit fly (2007) Drosophila kikkawai, fruit fly (2011) Drosophila melanogaster, fruit fly (model organism) (2000) Drosophila mojavensis, fruit fly (2007) Drosophila neotestacea, fruit fly (transcriptome 2014) Drosophila persimilis, fruit fly (2007) Drosophila pseudoobscura, fruit fly (2005) Drosophila rhopaloa, fruit fly (2011) Drosophila santomea, fruit fly () Drosophila sechellia, fruit fly (2007) Drosophila simulans, fruit fly (2007) Drosophila takahashi, fruit fly (2011) Drosophila virilis, fruit fly (2007) Drosophila willistoni, fruit fly (2007) Drosophila yakuba, fruit fly (2007) Family Phoridae Megaselia abdita, scuttle fly (transcriptome 2013) Family Psychodidae (drain flies) Clogmia albipunctata, moth midge (transcriptome 2013) Family Sarcophagidae (flesh flies) Sarcophaga Bullata, Flesh fly (2019) Family Syrphidae (hoverflies) Episyrphus balteatus, hoverfly (transcriptome 2011) Order Hemiptera Acyrthosiphon pisum, aphid (pea aphid) (2010) Ericerus pela, Chinese wax scale insect (2019) Laodelphax striatellus, small brown planthopper (2017) Lycorma delicatula, spotted lanternfly (2019) Rhodnius prolixus, kissing-bug (2015) Rhopalosiphum maidis, Corn leaf aphid (2019) Sitobion miscanthi, Indian grain aphid (2019) Triatoma rubrofasciata, assassin bug (2019) Order Hymenoptera Acromyrmex echinatior colony Ae372, ant (Panamanian leafcutter) (2011) Apis mellifera, bee (honey bee), (model for eusocial behavior) (2006) Atta cephalotes, ant (leaf-cutter ant) (2011) Camponotus floridanus, ant (2010) Cerapachys biroi, ant (clonal raider ant)(2014) Euglossa dilemma, Green orchid bee (2017) Harpegnathos saltator, ant (2010) Lasius niger, ant (black garden ant)(2017) Linepithema humile, ant (Argentine ant) (2011) Nasonia giraulti, wasp (parasitoid wasp) (2010) Nasonia longicornis, wasp (parasitoid wasp) (2010) Nasonia vitripennis, wasp (parasitoid wasp; model organism) (2010) Netelia fuscicornis, wasp (parasitoid wasp) (2024) Nomia Melanderi, Alkali bee (2019) Pogonomyrmex barbatus, ant (red harvester ant) (2011) Solenopsis invicta, ant (fire ant) (2011) Order Lepidoptera Abrostola tripartita Hufnagel, Spectacle (2021) Achalarus lyciades, Hoary Edge Skipper (2017) Ahamus jianchuanensis, Jianchuan ghost moth (2024) Antharaea yamamai, Japanese oak silk moth (2019) Arctia plantaginis, Wood tiger moth (2020) Bicyclus anynana, squinting bush brown (2017) Bombyx mori Strain:p50T, moth (domestic silk worm) (2004) Calycopis cecrops, Red-Banded Groundstreak (2016) Calycopis isobeon, Dusky-Blue Groundstreak (2016) Coenonympha arcania, Pearly Heath (2024) Cydia pomonella, codling moth (2019) Danaus plexippus, monarch butterfly) (2011) Erebia cassioides, Common Brassy Ringlet (2025) Heliconius melpomene, butterfly (2012) Keiferia lycopersicella, Tomato pinworm (2024) Melitaea cinxia, Glanville fritillary butterfly (2014) Megathymus ursus violae, bear giant skipper butterfly (2018) Morpho helenor, Common blue morpho (2023) Morpho achilles, Blue-banded morpho (2023) Morpho deidamia (2023) Papilio bianor, Chinese peacock butterfly (2019) Phthorimaea absoluta, Tomato leafminer (2024) Pieris rapae, small cabbage white butterfly (2016) Plodia interpunctella, Indianmeal moth (2022) Plutella xylostella, moth (diamondback moth) (2013) Scrobipalpa atriplicella, Goosefoot groundling moth (2024) Spodoptera frugiperda, Fall armyworm (2017) Thitarodes armoricanus, Himalaya ghost moth (2024) Thitarodes xiaojinensis, Xiaojin ghost moth (2024) Troides aeacus, Golden birdwing (2024) Eudocima phalonia, fruit-piercing moth (2017) Order Orthoptera Locusta migratoria, migratory locust (2014) Schistocerca gregaria, desert locust (2020) Gryllus bimaculatus, two-spotted cricket (2021) Order Phthiraptera Pediculus humanus, louse (sucking louse; parasite) (2010) Menopon gallinae, Poutlry shaft louse (2024) Psocoptera Liposcelis brunnea, booklouse (2022) Order Raphidioptera Venustoraphidia nigricollis, black-necked snakefly (2023) Order Trichoptera Eubasilissa regina, purple caddisfly (2022,) Stenopsyche tienmushanensisi, Caddisfly (2018) Order Mantodea Tenodera sinensis, chinese praying mantis (2023)
Raw potatoes contain toxic glycoalkaloids, of which the most prevalent are solanine and chaconine. Solanine is found in other plants in the same family, Solanaceae, which includes such plants as deadly nightshade (Atropa belladonna), henbane (Hyoscyamus niger) and tobacco (Nicotiana spp.), as well as food plants like tomato. These compounds, which protect the potato plant from its predators, are especially concentrated in the aerial parts of the plant. The tubers are low in these toxins, unless they are exposed to light, which makes them go green. Exposure to light, physical damage, and age increase glycoalkaloid content within the tuber. Different potato varieties contain different levels of glycoalkaloids. The 'Lenape' variety, released in 1967, was withdrawn in 1970 as it contained high levels of glycoalkaloids. Since then, breeders of new varieties test for this, sometimes discarding an otherwise promising cultivar. Breeders try to keep glycoalkaloid levels below 200 mg/kg (0.0032 oz/lb). However, when these commercial varieties turn green, their solanine concentrations can go well above this limit, with higher levels in the potato's skin.
== Target organelle == In contrast to IP3 and cyclic ADP-ribose which predominantly mobilize Ca2+ from the neutral and abundant endoplasmic reticulum (ER) store, NAADP selectively targets acidic Ca2+ stores — usually less abundant than the ER but with a pivotal role that belies their size. This paradigm shift away from the ER derives from seminal studies, again in sea urchin egg, that showed NAADP-mediated Ca2+ release was sensitive to agents that target acidic organelles (e.g. bafilomycin A1) but was less sensitive to ones that interfere with ER Ca2+ storage (e.g. thapsigargin).
=== Protein purification === When purifying protein from a biological extract, streptomycin sulfate is sometimes added as a means of removing nucleic acids and ribonuclear proteins. Since it binds to ribosomes and precipitates out of solution, it serves as a method for removing rRNA, mRNA, and even DNA if the extract is from a prokaryote.
Sources: en.wikipedia.org
The sequence corresponds to a fragment of a protein found in human gastric juice, so related sequences are natural. The isolated fifteen-amino-acid peptide supplied for research is produced synthetically. Whether the free fragment circulates naturally in humans has not been settled.
In most jurisdictions it is not an approved medicine and is handled as a research material. Import and sale rules differ by country, and some regulators have placed it in categories that restrict human use. Status can change, so current local rules apply.
Rodent models dominate, particularly rats with induced gastric lesions, tendon injury, or vascular disruption. These designs allow controlled comparison but differ anatomically and metabolically from humans. Results from such models are commonly cited as preliminary.
It is not authorized as a medicine in the United States or the European Union. Regulatory treatment varies by jurisdiction, and in several places it is handled as a research chemical. Therapeutic claims are not supported by large human trials.