Core Peptides Review
Scored 6.54/10 on the published Peptide Source Review formula: lab credibility, shipping, pricing, operating history, and transparency.
- COAs on file
- 14
COAs on file
- Confirmed at the lab
- 12
Confirmed at the lab
- Products
- 17
Products
- Labs
- 1
Labs
6.54/ 10
Last scored
No testing cap
- Lab credibility and recency55%6.3 (show how this was scored)
- Shipping and refund20%7.5 (show how this was scored)
- Pricing15%7.0 (show how this was scored)
- Operating history5%7.0 (show how this was scored)
- Business transparency5%3.5 (show how this was scored)
Weights are fixed for every vendor. Select a row to see how it was scored.
Is Core Peptides legit?
Core Peptides scores 6.54 out of 10 (Fair, #48 of 100) as of October 23, 2026 and passes our testing gate: 14 of the 17 products we score carry a certificate, 12 confirmed with the issuing lab (a lab we grade B+). Its strongest area is shipping and refunds (7.5/10) and its weakest is transparency (3.5/10); its operating history on record covers over seven years.
On lab evidence, the heaviest-weighted factor, Core Peptides has independently verified third-party COAs, with COA work on record from Vanguard Laboratory. Its lowest price per milligram in our data is on GHK-Cu (see the table below).
How this score was calculated
Every point below follows the published tables in our methodology, with the policy wording we scored and a link to where we read it. Evidence last checked October 22, 2026. Lab credibility is worked product by product from the certificates on file.
Lab credibility6.3/10
Each carried product (lab supplies excluded) is scored from the certificate on file for it, on the published lab rubric: 3 for a published certificate, then points for the laboratory, the verification key, the tests on the certificate and its purity, held to 0 to 10. A certificate that is self-issued, names no laboratory, or comes from a laboratory whose independence is not established scores a flat 2.0; a product with no certificate, a certificate the laboratory’s own record fails, or a posted copy that differs materially from the laboratory’s copy scores 0. Calculated on , the day this page was built; the date each certificate was tested is shown on its row.
- BPC-1578.5
Certificate from Vanguard Laboratory, tier B+ · tested 2026-07-22
- 3.0Certificate published (base)
- +2.0Laboratory in our directory at tier B+ (Vanguard Laboratory)
- +1.5Verification key printed
- +1.5Key confirmed at the laboratory's own site
- +0.5Purity 99.8% (99.7% or higher)
- TB-5008.5
Certificate from Vanguard Laboratory, tier B+ · tested 2026-07-22
- 3.0Certificate published (base)
- +2.0Laboratory in our directory at tier B+ (Vanguard Laboratory)
- +1.5Verification key printed
- +1.5Key confirmed at the laboratory's own site
- +0.5Purity 99.8% (99.7% or higher)
- GHK-Cu8.5
Certificate from Vanguard Laboratory, tier B+ · tested 2026-04-02
- 3.0Certificate published (base)
- +2.0Laboratory in our directory at tier B+ (Vanguard Laboratory)
- +1.5Verification key printed
- +1.5Key confirmed at the laboratory's own site
- +0.5Purity 99.8% (99.7% or higher)
- CJC-12958.0
Certificate from Vanguard Laboratory, tier B+ · tested 2026-07-22
- 3.0Certificate published (base)
- +2.0Laboratory in our directory at tier B+ (Vanguard Laboratory)
- +1.5Verification key printed
- +1.5Key confirmed at the laboratory's own site
- 0.0Purity 99.02% (99.0% up to but not including 99.7%)
- Ipamorelin6.5
Certificate from Vanguard Laboratory, tier B+ · tested 2026-07-15
- 3.0Certificate published (base)
- +2.0Laboratory in our directory at tier B+ (Vanguard Laboratory)
- +1.5Verification key printed
- +1.5Key confirmed at the laboratory's own site
- −1.5Purity 98.46% (97.0% up to but not including 99.0%)
- Semax0.0
No certificate on file for this product: scores 0, counted fully because it is one of the core products.
- Selank0.0
No certificate on file for this product: scores 0, counted fully because it is one of the core products.
- Melanotan-20.0
No certificate on file for this product: scores 0, counted fully because it is one of the core products.
- Sermorelin5.0
Certificate from Vanguard Laboratory, tier B+ · tested 2026-07-22
- 3.0Certificate published (base)
- +2.0Laboratory in our directory at tier B+ (Vanguard Laboratory)
- +1.5Verification key printed
- −1.5Purity 98.69% (97.0% up to but not including 99.0%)
- Tesamorelin8.5
Certificate from Vanguard Laboratory, tier B+ · tested 2026-04-28
- 3.0Certificate published (base)
- +2.0Laboratory in our directory at tier B+ (Vanguard Laboratory)
- +1.5Verification key printed
- +1.5Key confirmed at the laboratory's own site
- +0.5Purity 99.8% (99.7% or higher)
- PT-1418.0
Certificate from Vanguard Laboratory, tier B+ · tested 2026-07-22
- 3.0Certificate published (base)
- +2.0Laboratory in our directory at tier B+ (Vanguard Laboratory)
- +1.5Verification key printed
- +1.5Key confirmed at the laboratory's own site
- 0.0Purity 99.26% (99.0% up to but not including 99.7%)
- AOD-96048.0
Certificate from Vanguard Laboratory, tier B+ · tested 2026-07-22
- 3.0Certificate published (base)
- +2.0Laboratory in our directory at tier B+ (Vanguard Laboratory)
- +1.5Verification key printed
- +1.5Key confirmed at the laboratory's own site
- 0.0Purity 99.08% (99.0% up to but not including 99.7%)
- IGF-1 LR38.0
Certificate from Vanguard Laboratory, tier B+ · tested 2026-07-15
- 3.0Certificate published (base)
- +2.0Laboratory in our directory at tier B+ (Vanguard Laboratory)
- +1.5Verification key printed
- +1.5Key confirmed at the laboratory's own site
- 0.0Purity 99.5% (99.0% up to but not including 99.7%)
Certificate from Vanguard Laboratory, tier B+ · tested 2026-07-22
- 3.0Certificate published (base)
- +2.0Laboratory in our directory at tier B+ (Vanguard Laboratory)
- 0.0No purity figure on the certificate
- GHRP-28.0
Certificate from Vanguard Laboratory, tier B+ · tested 2026-07-22
- 3.0Certificate published (base)
- +2.0Laboratory in our directory at tier B+ (Vanguard Laboratory)
- +1.5Verification key printed
- +1.5Key confirmed at the laboratory's own site
- 0.0Purity 99.02% (99.0% up to but not including 99.7%)
- GHRP-68.0
Certificate from Vanguard Laboratory, tier B+ · tested 2026-07-22
- 3.0Certificate published (base)
- +2.0Laboratory in our directory at tier B+ (Vanguard Laboratory)
- +1.5Verification key printed
- +1.5Key confirmed at the laboratory's own site
- 0.0Purity 99.01% (99.0% up to but not including 99.7%)
- Hexarelin8.0
Certificate from Vanguard Laboratory, tier B+ · tested 2026-07-22
- 3.0Certificate published (base)
- +2.0Laboratory in our directory at tier B+ (Vanguard Laboratory)
- +1.5Verification key printed
- +1.5Key confirmed at the laboratory's own site
- 0.0Purity 99.08% (99.0% up to but not including 99.7%)
Mean of 17 products: 106.5 ÷ 17 = 6.265.
No adjustments.
6.265 = 6.265, rounded to 0.1: 6.3/10.
Testing gate: 12 of 17 products have a certificate from a directory laboratory (not tier D, not self-issued) with the key confirmed at the laboratory. That is at least half, so the vendor counts as third-party tested and no cap applies.
Shipping and refunds7.5/10
- +3
Returns and refunds
Refunds may be requested up to 30 days after an order is placed.
- 0
Lost or damaged parcels
shall not be responsible for lost shipments ... lost or stolen mail
- +1.5
Dispatch time
Same business day if ordered before 4pm ET, Mon-Fri
- +1
Tracking on all orders
Order tracking? Log in to your account to see an updated shipping status
- +1.5
Payment you can dispute
Footer payment image (alt 'Master card'); public Woo cart API lists card gateway 'inoviodirectmethod' plus ACH, Zelle, Cash App, crypto
- +1
Shipping rates published
USPS Priority Mail [price] - Free shipping on orders [price]+; UPS Overnight [price] flat rate
- −0.5
Policies that contradict each other
Terms: "we do not accept any returns" vs shipping: "Refunds may be requested up to 30 days after an order is placed."
corepeptides.com (opens in new tab) source 2 (opens in new tab)checked
Total +7.5: 7.5/10.
Pricing7.0/10
We compared Core Peptides’s current single-vial prices on 17 products, each matched to the same product and milligrams per vial, with the median price of the other vendors. Its typical price (the median ratio across those products) is at the market median (ratio 1.00), which the published scale maps to 7.0/10. checked
Operating history7.0/10
Counted from October 13, 2019, the earliest dated evidence of this business operating: 7.0 years as of October 22, 2026, which the published table maps to 7.0/10.
Start moves to the registration of corepeptides.com (2019-10-13): Wayback has no capture between that registration and the first Core Peptides store capture (2020-11-24), so the domain was never shown parked, for sale or used by another business. The 2014 captures belong to an earlier registration. The site names no operating company.
- 2019-10-13 Domain registration: registration 2019-10-13T06:15:11Z (Tucows); no capture 2019-10-13 to 2020-11-23 rdap.verisign.com (opens in new tab)
- 2020-11-24 Archived copy: priced product page with cart web.archive.org (opens in new tab)
- 2021-01-14 Dated public mention: customer post about a CorePeptides blend reddit.com (opens in new tab)
Transparency3.5/10
- 0
Legal entity named
No legal entity named on terms, contact or about pages
- +1
Business address
5401 S Kirkman Rd, Suite 310, Orlando, FL 32819
Address checked: virtual office.
- +1
- 0
Named owner or staff
Scientific content on this site is written and reviewed by Dr. Dimitar Marinov, MD, PhD
A named content reviewer is not a person with a role in running the business.
- 0
Dated terms with a governing law
Shipping page 'Last updated: 09/30/2026' but terms state no governing law
- +1.5
Testing lab named, certificates published
each batch is tested by Vanguard Laboratory, an A2LA-accredited US lab
Total +3.5: 3.5/10.
Shop Core Peptides
- Rated 6.54/10 · Fair
- 12 COAs confirmed at the issuing lab
- Best value: GHK-Cu at $1.16/mg
Audit history and why the rating changed
We re-audit vendors against their live COAs and site. Here is what most recently moved this rating, and why.
See the full score history and chart
- Most recent audit · 6.38to6.54
Certificate library re-checked on 23 October 2026: the GHK-Cu and Tesamorelin certificates were confirmed in Vanguard Laboratory's own records, so two more products count as confirmed at the issuing laboratory. Lab 6.0 to 6.3.
- Audit · 6.82to6.38
Laboratory grades re-checked on 22 October 2026 under the published laboratory rulebook (checks L1 to L6 on How We Rate). Vanguard Laboratory's A2LA accreditation does not cover peptide testing (its scope lists microbiology, trace elements, preservatives and residual solvents), so its certificates no longer earn the accreditation point (check L6); its identity test is by HPLC retention time (check L4), which grades it B+. This affects 13 of Core Peptides' certificates. Lab 6.8 to 6.0.
- Audit · 6.71to6.82
Lab score recalculated on 22 October 2026 under the published core-product rule (A1b): a missing certificate on one of the 15 most widely carried products still counts fully, while on any other product it now counts at half weight, so a broad catalogue is not penalised as much for its breadth. Lab 6.6 to 6.8. Note added 22 October 2026: a score on this entry was corrected from 6.70 to 6.71; it had been rounded down instead of half up. Note added 22 October 2026: a score on this entry was corrected from 6.81 to 6.82; it had been rounded down instead of half up.
Earlier audits (6)
- Audit · 6.68to6.71
Operating history re-checked on 22 October 2026 under the published rule (earliest dated evidence of the business, including a never-parked store domain and the named operating company, looked up for every vendor): operating history 6.5 to 7.0.
- Audit · 6.63to6.68
Claim deductions re-checked on 22 October 2026 under the published rule that a claim deduction applies only where a site claim is contradicted by what its certificates show, never for products merely lacking a certificate. Lab 6.5 to 6.6.
- Audit · 6.67to6.63
Re-scored on 22 October 2026 under our published rubric for shipping, pricing, operating history and transparency, applied to every vendor the same day: prices re-read from the vendor's site and matched by milligrams per vial, operating history from the earliest dated evidence of the business, and policies scored item by item. shipping and refunds 7.0 to 7.5, pricing 7.6 to 7.0, operating history 7.0 to 6.5, transparency 4.0 to 3.5.
- Audit · 6.61to6.67
Lab score recalculated on 22 October 2026 under the uniform published rubric applied to every vendor: every listed product was rescored on the same fixed certificate points, with fixed deductions for site statements about testing that the certificates do not bear out. Lab 6.4 to 6.5.
- Audit · 6.28to6.61
Lab 5.8 to 6.4. Recomputed under our published rule, which averages the lab score over the products we list and counts a listed product with no certificate as zero. Thirteen of 17 listed products carry Vanguard Laboratory reports listed under Core Peptides' name; the document shown for Fragment 176-191 is the AOD-9604 analysis, so that product now counts as having no certificate. A small deduction applies because the site says every product is tested before release while four listed products have no certificate of their own.
- Audit · 3.11to6.28
Re-audited 2026-10-18, replacing a May 2026 seed score that was never properly audited. Lab rises from 0 to 5.8 and testing status moves from not tested to third-party tested: 14 of 17 tracked products now link Vanguard Laboratory reports, and the reports we checked are listed in Vanguard's own reporting hub, though the panels cover purity and identity only, and the Fragment 176-191 report repeats the AOD-9604 analysis. Shipping rises from 5.9 to 7.0 for a clear dispatch table, card payment and a 30-day refund window. Pricing falls from 8.5 to 7.6 on live standard prices near the market median. Tenure moves from 8.5 to 7.0 for a domain registered in October 2019. Transparency eases from 4.6 to 4.0: an Orlando suite address and phone, but no legal entity or governing law. Semaglutide, tirzepatide and retatrutide remain unlisted.
Editor’s notes
As of our October 2026 audit, Core Peptides publishes certificates from Vanguard Laboratory in Washington state, whose ISO/IEC 17025 accreditation covers other kinds of testing but not peptides (A2LA scope checked 22 October 2026), on 13 of the 17 products we track. The reports are dated April or July 2026 and show chromatographic purity between 98.5% and 99.8%. They cover identity and purity only, with no endotoxin, sterility or content testing, and identity is confirmed by HPLC rather than mass spectrometry. In October 2026 we found twelve of these reports listed in Vanguard's own reporting hub under Core Peptides' name, so those check out at the laboratory; the GHK-Cu and Tesamorelin reports were confirmed there on 23 October 2026, and the Sermorelin report was not confirmed. The Fragment 176-191 report carries the same laboratory sample number, purity figure and chromatogram as the AOD-9604 report, with the chromatogram labelled for AOD-9604, so it does not document a separate Fragment 176-191 test, and Fragment 176-191 shows no certificate of its own. Semax, Selank and Melanotan 2 show no certificate. Orders placed before 4 pm Eastern ship the same weekday by USPS Priority, with an overnight option, free shipping above a threshold and card payment. Orders can be cancelled before shipment, and refunds may be requested within 30 days of ordering. At our 22 October 2026 check, the site stated that it is not responsible for lost or stolen shipments. Prices sit near the market median. The earliest archived copy of its store with prices dates from November 2020.
Core Peptides COAs and lab test results
One row per product: the certificate on file and how the lab rule reads it, the laboratory that issued it and its tier, the date it was tested, the purity it reports, and the lowest price per milligram we recorded (per IU or mL where a product is sold that way).
Vanguard LaboratoryTier B+tested
- Purity
- 99.8%
- Price per mg
- $9.70$97.00 / 10mgbest of 2 sizes
Vanguard LaboratoryTier B+tested
- Purity
- 99.8%
- Price per mg
- $14.00$140.00 / 10mgbest of 2 sizes
Vanguard LaboratoryTier B+tested
- Purity
- 99.8%
- Price per mg
- $1.16$58.00 / 50mg
Vanguard LaboratoryTier B+tested
- Purity
- 99.02%
- Price per mg
- $8.20$41.00 / 5mg
Vanguard LaboratoryTier B+tested
- Purity
- 98.46%
- Price per mg
- $8.60$43.00 / 5mg
- Purity
- —
- Price per mg
- $2.52$63.00 / 25mg
- Purity
- —
- Price per mg
- $5.20$52.00 / 10mg
- Purity
- —
- Price per mg
- $4.10$41.00 / 10mg
Vanguard LaboratoryTier B+tested
- Purity
- 98.69%
- Price per mg
- $9.60$48.00 / 5mg
Vanguard LaboratoryTier B+tested
- Purity
- 99.8%
- Price per mg
- $7.90$79.00 / 10mgbest of 2 sizes
Vanguard LaboratoryTier B+tested
- Purity
- 99.26%
- Price per mg
- $4.30$43.00 / 10mg
Vanguard LaboratoryTier B+tested
- Purity
- 99.08%
- Price per mg
- $8.20$41.00 / 5mg
Vanguard LaboratoryTier B+tested
- Purity
- 99.5%
- Price per mg
- $150.00$150.00 / 1mgbest of 2 sizes
Vanguard LaboratoryTier B+tested
- Purity
- —
- Price per mg
- $8.80$44.00 / 5mg
Vanguard LaboratoryTier B+tested
- Purity
- 99.02%
- Price per mg
- $2.90$29.00 / 10mgbest of 2 sizes
Vanguard LaboratoryTier B+tested
- Purity
- 99.01%
- Price per mg
- $2.90$29.00 / 10mgbest of 2 sizes
Vanguard LaboratoryTier B+tested
- Purity
- 99.08%
- Price per mg
- $9.40$47.00 / 5mg
Learn more about what Core Peptides carries
Rated higher than Core Peptides, with a reader code
Core Peptides is not one of our affiliate partners, so we have no code for it. These partners score above it under the same published rules, pass our testing gate, and give readers a discount.
Affiliate links: we may earn a commission if you buy. It never changes a score or rank.
7.71/10 · Strong · carries 11 of the same products
7.55/10 · Strong · carries 12 of the same products
7.09/10 · Strong · carries 11 of the same products
Core Peptides: Frequently Asked Questions
Is Core Peptides legit?
Core Peptides scores 6.54 out of 10 (Fair, #48 of 100) as of October 23, 2026 and passes our testing gate: 14 of the 17 products we score carry a certificate, 12 confirmed with the issuing lab (a lab we grade B+). Its strongest area is shipping and refunds (7.5/10) and its weakest is transparency (3.5/10); its operating history on record covers over seven years.
Is there a Core Peptides promo code, coupon code, or discount code?
We do not have a verified Core Peptides promo code or coupon code right now. When Core Peptides runs a sale or issues a discount code, we post it here and on our promos page, so bookmark this page for the latest Core Peptides discount.
Does Core Peptides use third-party lab testing?
Yes. We have independently verified third-party COA evidence for this vendor. Laboratories on the certificates we hold: Vanguard Laboratory.
Where can I see Core Peptides' COAs?
In the "Core Peptides COAs and lab test results" table on this page. We hold 14 certificates for Core Peptides, covering 14 of the 17 products we track, issued by Vanguard Laboratory. 12 products' certificates were confirmed at the issuing laboratory itself. Each row links the certificate, its lab, its test date and the purity it reports.
What peptides does Core Peptides carry?
Core Peptides carries BPC-157, TB-500, GHK-Cu, CJC-1295, Ipamorelin, Semax, Selank, Melanotan-2, and 9 more. Current per-milligram pricing, COA links, and verification keys for each are in the comparison table on this page.
Is the Core Peptides review on Peptide Source Review affected by affiliate status?
No. All affiliate relationships are publicly disclosed and never change a vendor's score, rank, or gate status. Our scoring formula is published in full and applied identically to every vendor.
Want to understand how this score was built?
Read the full methodology or the editorial integrity policy.
Core Peptides6.54Fair
12 confirmed at the lab