Improved Peptides
Re-analysis of the published site located 10 certificate records and wrote 7 mapped to tracked compounds. 6 strengths and 3 weaknesses recorded from the findings.
Edited by Slava Melikov, Research Editor · reviewed 28 Sept 2026
Last verified · 6 certificate records · rubric v1.11.0 · improvedpeptides.com
Source: PepIndex, an independent index of research-peptide vendors. No vendor can pay for a rank, every score is computed by a published formula, and every figure links to the document it was read from.
PepIndex score
59.1 / 100
3.0/ 5Partly documentedData coverage
87%
Coverage is the share of scored fields we hold and corroborated for Improved Peptides. A score built on a handful of unchecked claims and a score built on forty verified data points are not the same finding, so both numbers are always published together. How coverage is computed.
Is Improved Peptides legit?
Yes, on the evidence PepIndex holds. We have read 6 certificate records for Improved Peptides, issued by 4 laboratories, and score it 59.1/100 on 87% data coverage — rank 30 of 57.
- Across those lots the mean assayed purity is 99.44%, and the weakest single lot came back at 99.02%.
- 2 of 6 lots assayed below the mass printed on the label.
- PepIndex holds no ISO/IEC 17025 accreditation record for those laboratories either way.
- Its certificates can be read without an account, so anyone can check these figures.
- On the business side it publishes a postal address and prices visible without an account.
What this does not tell you
- PepIndex has located no independent customer reviews for Improved Peptides, so nothing here speaks to its service or fulfilment.
- A score measures what a vendor publishes about its testing and its business. It does not measure the contents of any vial a buyer actually receives, and PepIndex does not commission its own assays.
Certificate recordsLot-level results with labeled versus assayed mass6 lots22.7% mean deviationView all →Hide ↑
Discrepancy is computed as the absolute difference between labeled and assayed mass, divided by the labeled mass. A vendor-published certificate is a claim; only an independently commissioned assay is treated as corroboration.
| Compound | Lot | Tested | Lab | Labeled | Assayed | Discrepancy | Purity | Report |
|---|---|---|---|---|---|---|---|---|
| BPC-157 | IP-BPC-2026-001 | Principal Chemist | 10 mg | 11.81 mg | 18.1% | 99.2% | Vendor-published | |
| GHK-Cu | IP-GHKCU-2026-001 | Not named on certificate | 50 mg | 58.63 mg | 17.3% | 99.8% | Vendor-published | |
| MOTS-c | IP-MOTSC-2026-001 | Confirmed | 10 mg | 10.65 mg | 6.5% | 99.0% | Vendor-published | |
| TB-500 | IP-TB500-2026-001 | Principal Chemist | 10 mg | 11.76 mg | 17.6% | 99.1% | Vendor-published | |
| Tesamorelin | IP-TESA-2026-001 | Not named on certificate | 5 mg | 1.23 mg | 75.4% | 99.7% | Vendor-published | |
| Melanotan I | PT-7F4B6DEAFFB3-1 | Krause Analytical LLC | 10 mg | 9.87 mg | 1.3% | 99.9% | Vendor-published |
Recorded data pointsEvery field with its source, capture date and whether we corroborated it8 verified9 claimed2 not recordedView all →Hide ↑
A tag of verified means we opened the cited source and confirmed the value; published means we recorded the vendor’s own published information, taken at face value. Both count in full; only a value with no checkable source earns nothing. Fields older than 30 days are marked stale.
Testing
- Testing laboratory
- Principal ChemistVerifiedStale3 Aug 2026sourceLaboratory read from the certificate itself by vision extraction of the document. Evidence: “Laboratory named on the certificate document: Principal Chemist.”
- ISO/IEC 17025 accreditation
- Not recordedNot recorded
- Certificate granularity
- Per batchPublishedStale3 Aug 2026sourceBatch-level certificates described by the vendor; no lot-specific certificate was reachable. Evidence: “…sit. Standard and expedited options are available at checkout. Where can I find Certificates of Analysis? + Batch-specific Certificates of Analysis are accessib…”
- Certificate accessibility
- publicVerifiedStale3 Aug 2026editorial checkCertificates were fetched without passing any gate. Evidence: “Certificates were fetched without passing any gate.”
- Labeled vs. actual mg published
- YesVerifiedStale3 Aug 2026sourceLabeled mass is published against assayed mass, not purity alone. Evidence: “Labeled 10 mg, assayed 11.81 mg, purity 99.18% (lot IP-BPC-2026-001, Principal Chemist).”
- Historical certificates retained
- YesVerifiedStale3 Aug 2026editorial checkSuperseded certificates remain reachable, so consistency across lots can be checked. Evidence: “10 certificate documents reachable across 8 current lots, so superseded certificates remain available.”
Business
- Website
- https://improvedpeptides.comVerifiedStale3 Aug 2026sourceConfirmed reachable by the analysis run. Evidence: “Origin resolved and fetched: https://improvedpeptides.com”
- Legal entity
- Not recordedNot recorded
- Country
- USVerified28 Sept 2026editorial checkRead from the postal address this vendor publishes (9905 S Pennsylvania Ave Ste A, Oklahoma City, OK 73159). A published address is not proof of an operating location — several vendors in this index use a registered-agent suite — so this records where the vendor says it is, not where it necessarily ships from.
- Physical address
- 9905 S Pennsylvania Ave Ste A, Oklahoma City, OK 73159PublishedStale3 Aug 2026sourcePublished by the vendor. Confirmed present on the page; not independently confirmed as an operating location. Evidence: “…cy or how we handle your personal information, contact us: Improved Company LLC 9905 S Pennsylvania Ave Ste A, Oklahoma City, OK 73159 Email: support@improvedpe…”
- Contact channels
- Email (support@improvedpeptides.com)PublishedStale3 Aug 2026sourceContact routes published by the vendor. Not tested for a reply, so recorded as published rather than reachable. Evidence: “support@improvedpeptides.com”
Commercial
- Pricing
- ungatedVerifiedStale3 Aug 2026sourcePrices are published openly and can be compared without registering. Evidence: “…full COA published. FREE SHIPPING Free standard on every order. Free 2-day over $200, ships same day by 3 PM CT. =768px: single-row band, headline left, tier ma…”
- Payment methods
- Visa, Mastercard, Zelle, PayPal, American Express, Discover, CryptocurrencyPublishedStale3 Aug 2026sourcePayment methods as listed by the vendor. Not confirmed at checkout. Evidence: “…y testing data for every batch. What payment methods do you accept? + We accept Visa, Mastercard, PayPal, Venmo, and Zelle. All transactions are processed throu…”
- Guarantee / reship policy
- Case by caseVerifiedStale3 Aug 2026sourceA replacement is offered but the published policy reserves discretion to deny claims. Evidence: “…by Improved Peptides. We reserve the right to refuse or cancel any order at our sole discretion, including but not limited to cases of suspected fraud, unauthor…”
Track record
- Independent reviews located
- Not recordedNot recorded
- Mean sentiment (0–5)
- Not recordedNot recorded
- Complaint pattern
- Not recordedNot recorded
Compounds carried
What Improved Peptides charges for each compound, read from its own store: the vial it lists, the price per milligram that implies, and that figure against the median of the vendors this index prices. Below 100% is cheaper than the market.
- 5-Amino-1MQ$1.50 /mg$75.00 for 50 mg46%Visit
- CJC-1295$6.90 /mg$69.00 for 10 mg77%Visit
- Wolverine$6.45 /mg$129 for 20 mg100%Visit
- Selank$5.60 /mg$56.00 for 10 mg129%Visit
- GLOW$1.93 /mg$135 for 70 mg132%Visit
- Melanotan I1 cert$5.60 /mg$56.00 for 10 mg134%Visit
- BPC-1571 cert$7.50 /mg$75.00 for 10 mg136%Visit
- KPV$6.90 /mg$69.00 for 10 mg138%Visit
- Melanotan II$5.60 /mg$56.00 for 10 mg140%Visit
- Semax$5.60 /mg$56.00 for 10 mg140%Visit
- Semaglutide$9.20 /mg$92.00 for 10 mg142%Visit
- TB-5001 cert$8.50 /mg$85.00 for 10 mg142%Visit
- MOTS-c1 cert$7.90 /mg$79.00 for 10 mg144%Visit
- PT-141$6.50 /mg$65.00 for 10 mg144%Visit
- Tirzepatide$9.90 /mg$99.00 for 10 mg147%Visit
- DSIP$10 /mg$52.00 for 5 mg149%Visit
- Retatrutide$11 /mg$110 for 10 mg149%Visit
- GHK-Cu1 cert$0.90 /mg$45.00 for 50 mg150%Visit
- NAD+$0.18 /mg$89.00 for 500 mg150%Visit
- Epithalon$6.50 /mg$65.00 for 10 mg159%Visit
- KLOW$2.11 /mg$169 for 80 mg161%Visit
- Tesamorelin1 cert$15 /mg$150 for 10 mg188%Visit
Score history
| First recorded | 62.4 · #302 Oct 2026 |
|---|---|
| Best rank | #302 Oct 2026 |
| Today | 59.1 · #30-3.3 since first recorded |
Strengths
- Publishes 10 certificates on its own site; 6 read and recorded here
- Certificates are readable publicly, without an account
- Testing laboratory named on certificates (Principal Chemist)
- Publishes a physical postal address
- Prices are visible without an account
- Retains historical certificates for comparison over time
Weaknesses
- No ISO/IEC 17025 accreditation recorded for the testing lab
- No registered legal entity is disclosed
- No independent third-party reviews located
What the certificates test
Beyond purity and mass. Each row is an assay the laboratory ran and the verdict its own certificate printed. Coverage is recorded, not figures: these documents are tables, and the specification and the result are not reliably separable once the text is extracted.
- Bacterial endotoxins
- Reportedon 1 of 1
- Elemental impurities / heavy metals
- ReportedICP-MSon 1 of 1
- Identity (mass spectrometry)
- Reportedon 1 of 1
- Purity (HPLC)
- ReportedHPLC-UVon 1 of 1
Safety assays on record: Bacterial endotoxins, Elemental impurities / heavy metals.
Not reported on the certificates read: Sterility, Residual solvents, Microbial / bioburden. A test a certificate does not mention is a test this index holds nothing on — it is not a failure and is not counted as one.
Read 5 Oct 2026 from the certificates themselves. How evidence is recorded.
Regulatory & enforcement record
No adverse regulatory or enforcement action on record. We record authority actions — FDA warning letters, import alerts, seizures, criminal charges — when located. Self-reported reviews are deliberately not scored, because for this market they can be manufactured.
How this score was calculatedEvery signal, its weight and the arithmetic — reconstructable by handrubric v1.11.0View calculation →Hide ↑
Each criterion is scored out of 100 over the signals we could assess, then weighted into the overall figure. Within a criterion, a signal contributes weight × merit × credit: merit is how good the recorded value is, credit is what its provenance earns — 1.00 for a value with a checkable source, 0 for a value recorded without one. A missing signal counts as a partial gap — half its weight — so a vendor that publishes what others leave blank scores higher, while a blank still costs; a value recorded without a source counts in full and earns nothing, so omitting one can never raise a score. A criterion with no data at all — track record when no independent reviews are locatable — is set aside and the remaining weights renormalised; the coverage figure, shown alongside, reports how complete the assessment is.
Testing transparency
43.9 / 100 · weight 26% → 11.4
Is the testing lab named? Is it ISO/IEC 17025 accredited? Are certificates of analysis lot-specific, and can anyone read them without an account?
| Signal | Recorded value | Provenance | Weight | Merit | Credit | Points |
|---|---|---|---|---|---|---|
| Testing lab is namedA specific laboratory is identified, so the assay can be traced. | Principal ChemistLaboratory read from the certificate itself by vision extraction of the document. Evidence: “Laboratory named on the certificate document: Principal Chemist.” | VerifiedStale3 Aug 2026 · source | 1 | 1.00 | 1.00 × 0.9 stale | 0.90 / 1 |
| Lab holds ISO/IEC 17025 accreditationNot recorded. | — | Not recorded | 4 | 0.00 | not recorded | 0.00 / 4 |
| Certificate granularityCertificates cover a batch rather than an individual lot. | Per batchBatch-level certificates described by the vendor; no lot-specific certificate was reachable. Evidence: “…sit. Standard and expedited options are available at checkout. Where can I find Certificates of Analysis? + Batch-specific Certificates of Analysis are accessib…” | PublishedStale3 Aug 2026 · source | 3 | 0.60 | 1.00 × 0.9 stale | 1.62 / 3 |
| Certificates readable without an accountAnyone, including us, can read the certificates without registering. | PublicCertificates were fetched without passing any gate. Evidence: “Certificates were fetched without passing any gate.” | VerifiedStale3 Aug 2026 | 4 | 1.00 | 1.00 × 0.9 stale | 3.60 / 4 |
| Recognised testing laboratory1 of 6 certificates name a real, identifiable testing laboratory (a known lab, or a clearly independent one). Certificates with no named lab, or where the "lab" is just the vendor's own name, do not count — anyone can print those. | 1 / 6 recognised lab | PublishedStale29 Apr 2026 · source | 6 | 0.17 | 1.00 × 0.9 stale | 0.90 / 6 |
| Testing transparency subtotal · coverage 75% | 7.02 / 18 | |||||
Documentation depth
84.4 / 100 · weight 22% → 18.6
Does the vendor publish labeled-versus-actual milligram figures, retain historical certificates, and how large are the discrepancies we can measure?
| Signal | Recorded value | Provenance | Weight | Merit | Credit | Points |
|---|---|---|---|---|---|---|
| Labeled vs. actual mg publishedQuantitative fill data is published, not only a purity percentage. | PublishedLabeled mass is published against assayed mass, not purity alone. Evidence: “Labeled 10 mg, assayed 11.81 mg, purity 99.18% (lot IP-BPC-2026-001, Principal Chemist).” | VerifiedStale3 Aug 2026 · source | 1 | 1.00 | 1.00 × 0.9 stale | 0.90 / 1 |
| Historical certificates retainedPast certificates remain accessible, so consistency over time can be checked. | RetainedSuperseded certificates remain reachable, so consistency across lots can be checked. Evidence: “10 certificate documents reachable across 8 current lots, so superseded certificates remain available.” | VerifiedStale3 Aug 2026 | 3 | 1.00 | 1.00 × 0.9 stale | 2.70 / 3 |
| Certificates the vendor publishes10 certificates located, 6 of them indexed with readable results; full credit at six. | 10 published, 6 indexed | PublishedStale29 Apr 2026 · source | 7 | 1.00 | 1.00 × 0.9 stale | 6.30 / 7 |
| Labeled vs. actual discrepancyMean absolute deviation between labeled and assayed mass across 6 certificates. Zero scores full marks; 10% or worse scores nothing. | 22.7% mean | PublishedStale29 Apr 2026 · source | 1 | 0.00 | 1.00 × 0.9 stale | 0.00 / 1 |
| Certificate recencyThe most recent certificate is dated 2026-04-29, about 6 months ago. Certificates within a year score full marks; two years or older scores nothing. | newest 2026-04-29 | PublishedStale29 Apr 2026 · source | 4 | 1.00 | 1.00 × 0.9 stale | 3.60 / 4 |
| Documentation depth subtotal · coverage 98% | 13.50 / 16 | |||||
Price & value
25 / 100 · weight 20% → 5
How the vendor’s per-milligram prices for a standard basket of common compounds compare to the market. Priced below the peer median scores higher; well above it scores lower. An overpriced vendor cannot outrank a comparably documented, better-priced one.
| Signal | Recorded value | Provenance | Weight | Merit | Credit | Points |
|---|---|---|---|---|---|---|
| Price vs market ($/mg)Priced about 40% above the peer median per milligram across a standard basket — weaker value than the typical vendor. | 140% of medianPrice index 140% of peer median across 15 compounds (0 outliers dropped): kpv $6.9/mg, dsip $10.4/mg, semax $5.6/mg, ghk-cu $0.9/mg, mots-c $7.9/mg, pt-141 $6.5/mg, selank $5.6/mg, tb-500 $8.5/mg. | Verified6 Oct 2026 · source | 10 | 0.25 | 1.00 | 2.50 / 10 |
| Price & value subtotal · coverage 100% | 2.50 / 10 | |||||
Track record
100 / 100 · weight 12% → 12
Adverse regulatory or enforcement action on record — warning letters, import alerts, seizures, criminal charges. Authority-issued and publicly verifiable. Self-reported reviews are deliberately not scored: for this market they can be manufactured.
| Signal | Recorded value | Provenance | Weight | Merit | Credit | Points |
|---|---|---|---|---|---|---|
| Regulatory & enforcement recordNo adverse regulatory or enforcement action on record. Authority actions — warning letters, import alerts, seizures, criminal charges — are recorded here when located; self-reported reviews are deliberately not scored, because for this market they can be manufactured. | None on record | Verified24 Oct 2026 | 10 | 1.00 | 1.00 | 10.00 / 10 |
| Track record subtotal · coverage 100% | 10.00 / 10 | |||||
Business transparency
49.1 / 100 · weight 12% → 5.9
Is a legal entity named, is there a physical address, and can the vendor be reached?
| Signal | Recorded value | Provenance | Weight | Merit | Credit | Points |
|---|---|---|---|---|---|---|
| Named legal entityNot recorded. | — | Not recorded | 3 | 0.00 | not recorded | 0.00 / 3 |
| Physical address publishedA postal address is published. | 9905 S Pennsylvania Ave Ste A, Oklahoma City, OK 73159Published by the vendor. Confirmed present on the page; not independently confirmed as an operating location. Evidence: “…cy or how we handle your personal information, contact us: Improved Company LLC 9905 S Pennsylvania Ave Ste A, Oklahoma City, OK 73159 Email: support@improvedpe…” | PublishedStale3 Aug 2026 · source | 2 | 1.00 | 1.00 × 0.9 stale | 1.80 / 2 |
| Contact channelsDistinct contact routes we could identify. Full credit at two. | Email (support@improvedpeptides.com)Contact routes published by the vendor. Not tested for a reply, so recorded as published rather than reachable. Evidence: “support@improvedpeptides.com” | PublishedStale3 Aug 2026 · source | 2 | 0.50 | 1.00 × 0.9 stale | 0.90 / 2 |
| Business transparency subtotal · coverage 57% | 2.70 / 7 | |||||
Commercial clarity
77.7 / 100 · weight 8% → 6.2
Is pricing visible without an account, is there a stated guarantee or reship policy, and are payment methods disclosed?
| Signal | Recorded value | Provenance | Weight | Merit | Credit | Points |
|---|---|---|---|---|---|---|
| Pricing visible without an accountPrices are published openly and can be compared. | UngatedPrices are published openly and can be compared without registering. Evidence: “…full COA published. FREE SHIPPING Free standard on every order. Free 2-day over $200, ships same day by 3 PM CT. =768px: single-row band, headline left, tier ma…” | VerifiedStale3 Aug 2026 · source | 4 | 1.00 | 1.00 × 0.9 stale | 3.60 / 4 |
| Guarantee / reship policyWhether the published policy states an outcome in advance or leaves it to discretion. | Case by caseA replacement is offered but the published policy reserves discretion to deny claims. Evidence: “…by Improved Peptides. We reserve the right to refuse or cancel any order at our sole discretion, including but not limited to cases of suspected fraud, unauthor…” | VerifiedStale3 Aug 2026 · source | 3 | 0.50 | 1.00 × 0.9 stale | 1.35 / 3 |
| Payment methods disclosedDisclosed payment routes. Full credit at three. | Visa, Mastercard, Zelle, PayPal, American Express, Discover, CryptocurrencyPayment methods as listed by the vendor. Not confirmed at checkout. Evidence: “…y testing data for every batch. What payment methods do you accept? + We accept Visa, Mastercard, PayPal, Venmo, and Zelle. All transactions are processed throu…” | PublishedStale3 Aug 2026 · source | 1 | 1.00 | 1.00 × 0.9 stale | 0.90 / 1 |
| Payment offers buyer recourseAccepts a payment method with buyer recourse — cards or wallets a processor underwrote, so a chargeback is possible if an order goes wrong. | Card / recoursePayment methods as listed by the vendor. Not confirmed at checkout. Evidence: “…y testing data for every batch. What payment methods do you accept? + We accept Visa, Mastercard, PayPal, Venmo, and Zelle. All transactions are processed throu…” | PublishedStale3 Aug 2026 · source | 3 | 1.00 | 1.00 × 0.9 stale | 2.70 / 3 |
| Commercial clarity subtotal · coverage 94% | 8.55 / 11 | |||||
Total
| Criterion | Subscore | Weight | Contribution | Coverage |
|---|---|---|---|---|
| Testing transparency | 43.9 | 26% | 11.4 | 75% |
| Documentation depth | 84.4 | 22% | 18.6 | 98% |
| Price & value | 25 | 20% | 5 | 100% |
| Track record | 100 | 12% | 12 | 100% |
| Business transparency | 49.1 | 12% | 5.9 | 57% |
| Commercial clarity | 77.7 | 8% | 6.2 | 94% |
| Computed score | 100% | 59.1 | 87% |
Rubric v1.11.0 · 8 verified, 9 claimed, 0 unsourced, 2 not recorded, 15 stale of 19 scored signals
Community
Reviews
Reader reviews are community context only — they are never part of Improved Peptides’s computed PepIndex score, which is built from evidence alone.
No reviews yet. .