Research Peptide Catalogue Formats and Sourcing Queries: A Research Review of Vial Fill Masses, Oral and Nasal Dosage-Form Literature, Quality Verification and the Commercial Vocabulary Behind "buy" and "for sale" Labels

Last updated: September 16, 2026 | Reading time: 13 min read

The research-peptide catalogue has a vocabulary of its own. A listing reads mots c 10mg or tesamorelin 10 mg; a search for the same compound reads tesamorelin for sale or mots-c peptide buy; a competing listing offers bpc-157 capsules, a peptide nasal spray or sublingual peptides; and a laboratory that has received its vials looks for a peptide storage case. None of these strings names a compound, yet together they account for much of how researchers encounter peptides. This review treats the catalogue unit itself as the subject: what the fill-mass number on a lyophilised vial denotes, what the oral- and nasal-delivery literature says about capsule, tablet and spray formats, how a Certificate of Analysis is read against the known impurity classes, and how the commercial vocabulary — peptide online, online peptide sales, bulk peptide wholesale, wholesale peptide — maps onto questions a literature review can and cannot answer. All content is provided strictly for research reference; the materials discussed are not for human or veterinary use.

Why the Catalogue Unit Is a Lyophilised Vial

The dominance of the freeze-dried vial in the research-peptide catalogue is a consequence of chemistry rather than convention. Peptides in aqueous solution are exposed to hydrolysis of the peptide backbone, deamidation of asparagine and glutamine residues, oxidation of methionine, cysteine and tryptophan, and physical aggregation; Manning and colleagues catalogue these pathways in their 2010 update on protein pharmaceutical stability and note that each proceeds far more slowly, or not at all, in the dried solid state [1]. Wang's review of lyophilisation describes the process by which water is removed by sublimation under vacuum, leaving an amorphous cake whose low molecular mobility suppresses degradation and extends shelf life from weeks to years [3]. The deamidation chemistry in particular was mapped by Geiger and Clarke, who showed that asparaginyl residues cyclise through a succinimide intermediate at rates that depend on the neighbouring residue and on solution pH — a pathway that is, in effect, paused while the peptide remains dry [4].

The lyophilised vial is therefore the format in which stability data are meaningful; every other catalogue format — capsules, tablets, sprays, dissolvable strips — is a secondary presentation whose relevance must be evaluated separately.

Fill-Mass Descriptors: What "10mg", "1mg", "100mg" and "500mg" Denote

The number on a catalogue listing is a nominal net peptide mass, and it is routinely misread. A vial labelled mots-c 10mg, cagrilintide 10mg, semax - 10mg, kisspeptin-10 - 10mg or epitalon 10mg does not contain ten milligrams of lyophilised powder that is entirely peptide. Synthetic peptides prepared by solid-phase synthesis and purified by reversed-phase HPLC in trifluoroacetic-acid-containing mobile phases are isolated as TFA salts; D'Hondt and colleagues, reviewing related impurities in peptide medicines, list the counter-ion together with residual water and synthesis-related species among the constituents that contribute to gross mass [2]. Manufacturers reconcile the difference by reporting a peptide-content value — the percentage of the gross mass that is peptide, determined by amino-acid analysis or quantitative HPLC — and by filling to a nominal net peptide mass rather than a gross mass [1][2].

Two consequences follow for the reader of a catalogue. First, the fill-mass descriptors that recur across the sector (igf lr3 1mg, igf-1 lr3 1mg, ghk-cu 100mg, ghkcu 100mg, ghk cu 100 mg, ghk cu 100mg) describe the container's nominal net content and are meaningful only alongside a CoA that states peptide content and purity. Second, the descriptor is a catalogue attribute, not a protocol quantity; this review does not translate fill masses into working concentrations or amounts. The same reading applies to the non-peptide coenzyme NAD⁺, which is catalogued alongside peptides in formats such as nad 500mg, nad 500 mg, nad+ 500 mg, nad 500, nad 500 peptide and nad 1000; NAD⁺ is a dinucleotide rather than a peptide, a distinction covered in the classification section below and in the site's NAD+ formulation review.

Oral Solid Formats and the Oral-Peptide Literature

The catalogue also lists oral solid presentations — bpc-157 capsules, bpc 157 capsules, bpc157 capsules, bpc 157 tablets, bpc 157 pill, bpc157 pills, bpc-157 pills, bpc 157 peptide pills, bpc 157 tb 500 capsules, tesamorelin capsules, tesamorelin pills, slu-pp-332 capsules, tesofensine capsules — and the question is whether the peer-reviewed record supports oral exposure for the compound in question. Drucker's 2020 review explains why the default answer is no: peptides are degraded by gastric acid and by luminal and brush-border proteases, and survivors are too large and polar to cross the intestinal epithelium, so oral bioavailability for unmodified peptides is typically below one percent [5]. The approvals that exist depend on enabling technology: Buckley and colleagues showed that oral semaglutide is absorbed across the gastric epithelium only because it is co-formulated with the enhancer SNAC, which buffers local pH and protects the peptide from pepsin — a mechanism they describe as compound-specific and transient [6]. A capsule bearing a peptide name but lacking such technology carries no comparable evidence.

Within this literature, BPC-157 is the exception that is repeatedly invoked. Sikiric and colleagues report that the pentadecapeptide is stable in human gastric juice for more than 24 hours and describe intragastric administration in their animal studies, which is why bpc-157 oral queries have a literature basis that ipamorelin oral, cjc 1295 oral and oral sermorelin queries do not [7]. For the GHRH analogues and ipamorelin, the peer-reviewed studies describe parenteral administration, and no published oral-bioavailability dataset for the capsule formats was located. Two catalogue "capsule" compounds are not peptides at all: tesofensine is a small-molecule triple monoamine reuptake inhibitor studied clinically as an oral tablet [8], and SLU-PP-332 is a small-molecule oestrogen-related-receptor agonist (see the SLU-PP-332 nomenclature review). For these an oral format is unremarkable; the "peptide" label is the misnomer.

Nasal, Sublingual and "Melt" Formats

The strings peptide nasal spray, nasal spray peptides, nasal peptides, sublingual peptides and melts describe a second family of non-vial presentations. Intranasal delivery of peptides is a legitimate and well-developed field: Illum's review of nasal drug delivery describes the mucosal barrier, the role of absorption promoters such as chitosan and alkylsaccharides, and the preclinical and clinical evidence that supports intranasal administration of selected peptides and proteins [9]. Semax and Selank, both developed as intranasal preparations, are discussed in the site's comparative review. The published evidence, however, concerns specific formulations characterised for permeation, retention and stability; a generic spray or dissolvable "melt" sharing a compound name inherits none of that data. Sublingual and buccal delivery face the same epithelial barrier Drucker describes for the gut, with the added constraint of short residence time [5].

Quality Verification: Certificates of Analysis, Impurity Classes and the Seized-Product Literature

A CoA is the document that converts a catalogue listing into a characterised reagent, and reading it requires knowing what can go wrong in peptide synthesis. D'Hondt and colleagues group peptide-related impurities into three classes: synthesis-related species (deletion and insertion sequences from incomplete coupling or deprotection, racemised diastereomers, residual protecting-group adducts, oxidised side chains, dimers), degradation products (β-elimination, diketopiperazine, pyroglutamate and succinimide formation) and excipient-interaction products [2]. Reversed-phase HPLC resolves most of these as separate peaks, which is why purity is reported as an area-percent of the main peak; mass spectrometry confirms the expected molecular mass [2]. The 2021 FDA guidance on synthetic peptides referring to recombinant-origin reference products formalises this framework for regulated products, setting expectations for identifying and controlling peptide-related impurities [10].

The value of such documentation is illustrated by what is found when it is absent. Krug, Thevis and colleagues analysed 337 products seized by German customs between 2010 and 2013 and identified 67 distinct active ingredients, with peptide hormones and growth factors accounting for 12.8% of findings; among the peptide products they encountered non-approved compounds, a fusion protein of unknown biological activity and products whose contents did not match their labels [11]. Vanhee and colleagues, working with the Belgian authorities, describe the mass-spectrometric identification of AOD-9604 in unlabelled vials that could not otherwise have been characterised [12]. These studies define the null case: material without a lot-specific CoA is, analytically, an unknown. Retail-channel queries such as gnc bpc 157, bpc 157 gnc and gnc store bpc 157 reflect a related confusion — a general retail chain is not a research-reagent channel, and any product so named would be a supplement format rather than a characterised reagent.

Classification Queries: "Is X a Peptide?"

A recurring class of query asks whether a catalogue item is a peptide at all, and the answer is frequently no. is mk 677 a peptide is answered by Patchett and colleagues' original description of MK-0677 (ibutamoren) as an orally active non-peptide growth hormone secretagogue built on a spiroindoline scaffold [13]; strings such as mk 677 peptides reflect its co-listing with peptide secretagogues rather than its chemistry. is l carnitine a peptide is likewise answered negatively: L-carnitine is a quaternary ammonium compound, and l carnitine peptide, l-carnitine peptide and l carnitine peptides are catalogue co-listings. Melatonin (melatonin peptide, peptide melatonin) is an indoleamine; cobalamin (b12 peptide) is a corrinoid; the "lipo" blends (lipo b peptide, what is lipo c peptide) are mixtures of methionine, inositol, choline and B vitamins that contain no peptide bond between amino-acid residues in a defined sequence. NAD⁺ (nad+ peptides, nad + peptide, nad plus peptide, peptides nad+, peptides nad) is a dinucleotide coenzyme.

The positive cases are instructive by contrast. Glutathione (peptide glutathione, gluta peptides) is a genuine tripeptide, γ-glutamyl-cysteinyl-glycine, albeit one with an unusual γ-linkage. MOTS-c (mots c peptides, what is mots c peptide, what is mots-c peptide) is a 16-residue peptide encoded within the mitochondrial 12S rRNA gene, as characterised by Lee and colleagues [14]. The catalogue habit of appending "peptide" to any compound sold in a vial is the source of the confusion.

Storage Containers and Cases

The final format cluster concerns what surrounds the vial. Queries for a peptide case, peptide cases, peptide storage case, peptide container or peptide containers describe secondary packaging — insulated or light-blocking boxes for transport and bench storage. The relevant literature is the stability literature already cited: lyophilised peptides are best protected from moisture, light and temperature excursions, each of which accelerates the pathways Manning and colleagues describe [1]. Once a peptide is in solution a separate concern arises: Goebel-Stengel and colleagues showed that peptides adsorb to some plastic and glass surfaces enough to alter measured concentrations, and recommended low-binding labware [15]. A storage case is a passive environmental control; the contact container is the one whose material matters.

Search-Query Taxonomy: Classifying Catalogue-Format and Sourcing Vocabulary

Grouping the strings that surround the catalogue unit by intent clarifies which questions a research review can answer. The taxonomy extends the reagent classification in the site's bacteriostatic water review to the compound catalogue as a whole.

Query Class	Representative Strings	Technical Reading
A. Fill-mass descriptors	mots c 10mg, mots-c 10mg, cagrilintide 10mg, tesamorelin 10 mg, semax - 10mg, kisspeptin-10 - 10mg, epitalon 10mg, igf lr3 1mg, igf-1 lr3 1mg, ghk-cu 100mg, ghkcu 100mg, ghk cu 100 mg, ghk cu 100mg, nad 500mg, nad 500 mg, nad+ 500 mg, nad 500, nad 500 peptide, nad 1000	Nominal net content of the vial, meaningful only with a CoA stating peptide content and purity [1][2]. Catalogue attribute, not a protocol quantity; no working amounts are derived here.
B. Oral solid formats	bpc-157 capsules, bpc 157 capsules, bpc157 capsules, bpc-157 pure 60 capsules, bpc 157 tb 500 capsules, bpc 157 tablets, bpc-157 lpt tablets 60 tabs, bpc 157 pill, bpc157 pills, bpc-157 pills, bpc 157 peptide pills, bpc-157 oral, tesamorelin capsules, tesamorelin pills, ipamorelin oral, cjc 1295 oral, oral sermorelin, slu-pp-332 capsules, tesofensine capsules	Oral peptide exposure is limited by proteolysis and epithelial permeability [5][6]; BPC-157 has gastric-juice stability data [7]; GHRH analogues and ipamorelin do not. Tesofensine and SLU-PP-332 are small molecules [8].
C. Nasal, sublingual and dissolvable formats	peptide nasal spray, nasal spray peptides, nasal peptides, sublingual peptides, melts	Intranasal peptide delivery is characterised formulation-by-formulation [9]; a generic spray or melt inherits no data from a named compound.
D. Classification ("is X a peptide?")	is mk 677 a peptide, mk 677 peptides, is l carnitine a peptide, l carnitine peptide, l-carnitine peptide, l carnitine peptides, melatonin peptide, peptide melatonin, b12 peptide, lipo b peptide, what is lipo c peptide, nad+ peptides, nad + peptide, nad plus peptide, peptides nad+, peptides nad, peptide glutathione, gluta peptides, mots c peptides, what is mots c peptide, what is mots-c peptide	Non-peptides: MK-677 [13], L-carnitine, melatonin, B12, lipotropic blends, NAD+. Peptides: glutathione (tripeptide), MOTS-c (16 residues) [14].
E. Sourcing and availability	tesamorelin for sale, tesamorelin peptide for sale, tesamorelin peptide buy, buy tesamorelin, where to buy tesamorelin, tesamorelin where to buy, best place to buy tesamorelin online, tesamorelin online, mots-c peptide buy, mots c peptide buy, mots-c buy, buy mots-c, mots-c peptide for sale, mots c peptide for sale, buy cagrilintide, klow peptide buy, klow peptide for sale, slu-pp-332 buy online, slu-pp-332 peptide buy online, slu pp 332 buy online, slu-pp-332 buy, buy slu-pp-332, slu pp 332 for sale, slu pp 332 peptide for sale, slu-pp-332 peptide for sale, tesofensine for sale, buy tesofensine, tesofensine buy online, bpc 157 peptides where to buy, ghk cu for sale, ll-37 peptide buy, buy dsip peptide, cjc-1295 ipamorelin buy online, mt2 peptide for sale, melanotan 1 for sale, buy melanotan, melanotan 2 order, retatrutide peptide cheap, bulk peptide wholesale, wholesale peptide, online peptide sales, peptide online	Availability queries for laboratory use. The literature-relevant answer is procedural: a research-grade source supplies a lot-specific CoA with HPLC purity and MS identity [2][11][12]. Suppliers are listed in the sourcing section below.
F. Cost and pricing	tesamorelin cost, tesamorelin peptide cost	Commercial attributes that vary by lot, fill mass and supplier; outside the scope of a literature review and not evaluated here.
G. Retail-channel navigation	gnc bpc 157, bpc 157 gnc, gnc store bpc 157	General retail is not a research-reagent channel; any product so named would be a supplement format, not a characterised reagent [11].
H. Supplier-navigational strings	short chain aminos reviews, is short chain aminos legit, short chain aminos reddit, short chain aminos com, short chain aminos.com, short chain aminos coupon code, short chain aminos coupon, short chain aminos discount code, short chain aminos promo code, short chain aminos calculator, short chain aminos cjc 1295 ipamorelin, short chain aminos tirzepatide, short chain aminos retatrutide, short chain aminos semaglutide	Brand-plus-attribute queries resolving to a supplier's site or a supplier's compound page. Promotions, pricing tools and third-party reviews are commercial matters this review does not evaluate.
I. Secondary packaging	peptide case, peptide cases, peptide storage case, peptide storage, peptide container, peptide containers, peptide bottle	Passive environmental control for lyophilised vials [1]; contact-material adsorption is the separate, solution-phase concern [15].

Where to Source Research Peptides

For laboratories locating characterised material, the operative criteria are a lot-specific Certificate of Analysis, HPLC purity, mass-spectrometric identity and explicit research-use-only labelling. Suppliers that catalogue research peptides under these terms include Short Chain Aminos, whose listings carry the fill-mass and CoA conventions described above; BioPep; Catalyst Research; and Apex Research Services. Availability, fill masses and documentation vary by supplier and by lot, and researchers should confirm each against the CoA rather than against the listing title. This review does not compare suppliers, evaluate pricing or endorse any product; the materials discussed are for research use only.

Frequently Asked Questions

What does the "10mg" on a peptide vial such as mots c 10mg mean?

It is the nominal net peptide mass, not the gross mass of powder. The lyophilised solid also contains counter-ion (usually trifluoroacetate or acetate) and residual water, so manufacturers report a peptide-content percentage and fill to the stated net peptide value [1][2]. It is a catalogue attribute; this review does not derive working amounts from it.

Are bpc-157 capsules supported by the oral-peptide literature?

BPC-157 is unusual in that Sikiric and colleagues report stability in human gastric juice for more than 24 hours and describe intragastric administration in animal models [7]. That is a stability and route observation about the pentadecapeptide, not a characterisation of any commercial capsule; most peptides show oral bioavailability below one percent without enabling technology [5][6].

Is ipamorelin oral or oral sermorelin a documented format?

No published oral-bioavailability dataset for ipamorelin, sermorelin or CJC-1295 capsule formats was located; the peer-reviewed studies of these compounds describe parenteral administration. The oral formats are catalogue presentations rather than evidence-backed routes [5].

Is mk 677 a peptide?

No. MK-677 (ibutamoren) was described by Patchett and colleagues as an orally active non-peptide growth hormone secretagogue with a spiroindoline scaffold [13]. Its co-listing with peptide secretagogues in catalogues explains the "mk 677 peptides" string.

Is l carnitine a peptide?

No. L-carnitine is a quaternary ammonium compound with no peptide bonds. Melatonin, vitamin B12 and NAD⁺ are likewise non-peptides that appear in peptide catalogues; glutathione and MOTS-c, by contrast, are genuine peptides [14].

Where to buy tesamorelin or mots-c for research?

From suppliers that provide a lot-specific Certificate of Analysis with HPLC purity and MS identity and label the material for research use only; the seized-product literature shows that material without such documentation is analytically an unknown [11][12]. The four suppliers linked above catalogue research peptides under these terms.

Works Cited

1. Manning MC, Chou DK, Murphy BM, Payne RW, Katayama DS. "Stability of protein pharmaceuticals: an update." Pharmaceutical Research. 2010;27(4):544-575. PMID: 20143256. DOI: 10.1007/s11095-009-0045-6
2. D'Hondt M, Bracke N, Taevernier L, et al. "Related impurities in peptide medicines." Journal of Pharmaceutical and Biomedical Analysis. 2014;101:2-30. PMID: 25044089. DOI: 10.1016/j.jpba.2014.06.012
3. Wang W. "Lyophilization and development of solid protein pharmaceuticals." International Journal of Pharmaceutics. 2000;203(1-2):1-60. PMID: 10967427. DOI: 10.1016/s0378-5173(00)00423-3
4. Geiger T, Clarke S. "Deamidation, isomerization, and racemization at asparaginyl and aspartyl residues in peptides: succinimide-linked reactions that contribute to protein degradation." Journal of Biological Chemistry. 1987;262(2):785-794. PMID: 3805008
5. Drucker DJ. "Advances in oral peptide therapeutics." Nature Reviews Drug Discovery. 2020;19(4):277-289. PMID: 31848464. DOI: 10.1038/s41573-019-0053-0
6. Buckley ST, Bækdal TA, Vegge A, et al. "Transcellular stomach absorption of a derivatized glucagon-like peptide-1 receptor agonist." Science Translational Medicine. 2018;10(467):eaar7047. PMID: 30429357. DOI: 10.1126/scitranslmed.aar7047
7. Sikiric P, Seiwerth S, Rucman R, et al. "Stable gastric pentadecapeptide BPC 157: novel therapy in gastrointestinal tract." Current Pharmaceutical Design. 2011;17(16):1612-1632. PMID: 21548867. DOI: 10.2174/138161211796196954
8. Astrup A, Madsbad S, Breum L, Jensen TJ, Kroustrup JP, Larsen TM. "Effect of tesofensine on bodyweight loss, body composition, and quality of life in obese patients: a randomised, double-blind, placebo-controlled trial." The Lancet. 2008;372(9653):1906-1913. PMID: 18950853. DOI: 10.1016/S0140-6736(08)61525-1
9. Illum L. "Nasal drug delivery — recent developments and future prospects." Journal of Controlled Release. 2012;161(2):254-263. PMID: 22300620. DOI: 10.1016/j.jconrel.2012.01.024
10. U.S. Food and Drug Administration. "ANDAs for Certain Highly Purified Synthetic Peptide Drug Products That Refer to Listed Drugs of rDNA Origin: Guidance for Industry." Federal Register notice, 20 May 2021 (86 FR 27424; Docket FDA-2017-D-5767).
11. Krug O, Thomas A, Walpurgis K, et al. "Identification of black market products and potential doping agents in Germany 2010-2013." European Journal of Clinical Pharmacology. 2014;70(11):1303-1311. PMID: 25168622. DOI: 10.1007/s00228-014-1743-5
12. Vanhee C, Moens G, Deconinck E, De Beer JO. "Identification and characterization of peptide drugs in unknown pharmaceutical preparations seized by the Belgian authorities: case report on AOD9604." Drug Testing and Analysis. 2014;6(9):964-968. PMID: 24976118. DOI: 10.1002/dta.1687
13. Patchett AA, Nargund RP, Tata JR, et al. "Design and biological activities of L-163,191 (MK-0677): a potent, orally active growth hormone secretagogue." Proceedings of the National Academy of Sciences USA. 1995;92(15):7001-7005. PMID: 7624358. DOI: 10.1073/pnas.92.15.7001
14. Lee C, Zeng J, Drew BG, et al. "The mitochondrial-derived peptide MOTS-c promotes metabolic homeostasis and reduces obesity and insulin resistance." Cell Metabolism. 2015;21(3):443-454. PMID: 25738459. DOI: 10.1016/j.cmet.2015.02.009
15. Goebel-Stengel M, Stengel A, Taché Y, Reeve JR Jr. "The importance of using the optimal plasticware and glassware in studies involving peptides." Analytical Biochemistry. 2011;414(1):38-46. PMID: 21315060. DOI: 10.1016/j.ab.2011.02.009