Which Research Peptides Get Reordered, and How Soon? Shop Data 2026
Reorder share and median reorder interval per research compound from one EU shop's fulfilled orders, ranked. Ordering patterns only, no counts, no protocol.
Research use only. This page provides background on the shop's order snapshot and context for questions about repeat ordering. Every compound sold here is supplied strictly for in-vitro research. Nothing on this page is a protocol, a recommendation or medical advice. Reordering is a behavior, never a signal of effect, tolerability or satisfaction.
TL;DR: repeat ordering in the shop snapshot
Research question: How often were research peptides reordered, and what were the median gaps between orders in this shop snapshot?
What the shop data say: About one in four customers, 24 percent, placed at least a second fulfilled order. The median gap between a customer's first and second order was 26 days. [P3 data sheet, Overall repeat behaviour]
Which compound leads: KPV has the highest reorder share among compounds with enough buyers for inclusion, at about one in three. Its median reorder interval was 45 days. [P3 data sheet, Repeat ranking per compound]
What was not measured: The snapshot does not measure effect, tolerability or satisfaction, and does not record why a customer reordered. [P3 data sheet, Absence statements allowed]
How were reorder share and interval measured?
The ranking measures the share of a compound's buyers who ordered it again, alongside the median gap between consecutive orders of that same compound by the same customer. The snapshot covers fulfilled web orders of peptidesdirect.io from 2026-03-21 to 2026-09-12. Its included statuses are delivered, shipped, returned and refunded; cancelled and unpaid orders are excluded. [P3 data sheet, SNAPSHOT; Repeat ranking per compound]
The counting unit is an order containing the compound, rather than individual vials. Multiple vials of the same compound within an order do not create separate reorder events. The published results contain relative shares, ranks and median gaps only. Compounds with too few distinct buyers for a robust share are omitted. [P3 data sheet, SNAPSHOT; Repeat ranking per compound]
How common is a second order at all?
About one in four customers, 24 percent, placed at least a second fulfilled order within the snapshot, with a median first-to-second-order gap of 26 days. This is the overall repeat measure reported by the shop. [P3 data sheet, Overall repeat behaviour]
The overall measure asks whether a customer returned for another order. The compound ranking asks whether a buyer ordered the same compound again. Those definitions matter: a return to the shop and a return to a particular compound are different events in this report. The overall median belongs to the first and second orders, while the compound medians belong to consecutive orders containing that compound. [P3 data sheet, Overall repeat behaviour; Repeat ranking per compound]
Both results are bounded by the stated snapshot dates. The overall figure describes repeat ordering observed in that window; the table describes the compound-specific repeats recorded there. Neither measurement records what happened to the contents of a research vial after an order. [P3 data sheet, SNAPSHOT; Legal notes]
Which compounds are reordered most often, and how soon?
KPV leads by reorder share, while GHK-Cu has the longest median reorder interval in the supplied list. The table reproduces the sheet's ranks, compound labels, relative share wording and day figures. [P3 data sheet, Repeat ranking per compound]
- compound
- KPV (
kpv) - share of its buyers who reordered it
- about one in three
- median days between reorders
- 45
- compound
- SS-31 (
ss-31) - share of its buyers who reordered it
- about one in five
- median days between reorders
- 14
- compound
- Tesamorelin (
tesamorelin) - share of its buyers who reordered it
- about one in six
- median days between reorders
- 26
- compound
- KLOW blend (
klow) - share of its buyers who reordered it
- about one in six
- median days between reorders
- 20
- compound
- Melanotan-2 (
melanotan-2) - share of its buyers who reordered it
- about one in six
- median days between reorders
- 42
- compound
- GHK-Cu (
ghk-cu) - share of its buyers who reordered it
- about one in six
- median days between reorders
- 50
- compound
- MOTS-c (
mots-c) - share of its buyers who reordered it
- about one in six
- median days between reorders
- 16
SS-31, MOTS-c and the KLOW blend have the shortest median gaps in the list. GHK-Cu combines a mid-table reorder share with the longest gap. [P3 data sheet, Repeat ranking per compound]
Retatrutide is the most-ordered compound overall, but is absent from this top group by reorder share. Overall ordering and same-compound repeat ordering answer different questions. The sheet provides no reason for retatrutide's absence from this group. [P3 data sheet, Repeat ranking per compound]
Reorder intervals are ordering patterns, not an application protocol for research vials.
What does a reorder not tell you?
A reorder does not measure effect, tolerability or satisfaction, and a rank says nothing about efficacy, safety or suitability. A customer may return for a new experiment, a different batch or a different vial size. Those reasons are not recorded here, so the ranking cannot distinguish between them. [P3 data sheet, SNAPSHOT; Absence statements allowed]
The measured interval is a gap between orders. It does not establish how long a vial was used by a person or provide a basis for an application timetable. The source records ordering behavior within the shop's snapshot, with the exclusions stated above. [P3 data sheet, Legal notes; SNAPSHOT; Repeat ranking per compound]
The reorder ranking is refreshed each quarter.
Products mentioned
KPV is the C-terminal tripeptide of alpha-MSH, Lys-Pro-Val (positions 11 to 13). Studied in cell and mouse models for NF-kB signalling, PepT1 transport in intestinal cells and antimicrobial activity in vitro. Batch-specific third-party CoA.
SS-31 (elamipretide) is an aromatic-cationic tetrapeptide, D-Arg-Dmt-Lys-Phe-NH2, that concentrates at the inner mitochondrial membrane and binds cardiolipin. Studied in cell and rodent models of mitochondrial bioenergetics. Batch-specific third-party CoA.
Tesamorelin is a stabilised GHRH(1-44) analogue with a trans-3-hexenoyl N-terminal modification, an agonist at the pituitary GHRH receptor. Lyophilized powder, specified purity at or above 98% (HPLC), batch CoA.
Sources
- peptidesdirect.io, 2026. Data sheet P3: which research peptides get reordered, and how soon (snapshot 2026-03-21 to 2026-09-12). Internal order snapshot, P3-datasheet.md.
Research use only. Every compound sold here is supplied strictly for in-vitro research. Nothing on this page is a protocol, a recommendation or medical advice.
Research context for English-speaking buyers
Most of our English-speaking customers ship to the UK, Ireland, Malta or other English-as-second-language EU territories. The regulatory picture differs per country.
- Relevant authorities
- MHRA (UK, post-Brexit), HPRA (Ireland, EU-aligned), FDA Section 503A bulks list (US, restricted Cat 2 status of several peptides as of 2026)
- Customs and VAT
- EU shipments include VAT, the rate depends on the destination country; UK shipments after Brexit are now extra-EU and may attract UK VAT plus a handling fee at import
- Typical shipping window
- EU 2-4 working days, UK 4-7 working days, other international 7-14 working days, depending on customs
Research-grade peptides shipped from our EU warehouse are sold for laboratory use only and are not authorised for human or veterinary therapeutic application in any of the destination jurisdictions. US customers should be aware that the FDA Section 503A bulks list classification (and the April 2026 reclassification of twelve compounds) only governs compounding pharmacies, not direct-to-researcher imports for non-clinical work. UK buyers should declare the consignment on import and may be asked for a research justification by HMRC. We provide a CoA per batch identified by colour code rather than serial number; customs sometimes asks for this document when clearing the parcel.