Stack Research Review
Scored 2.51/10 on the published Peptide Source Review formula: lab credibility, shipping, pricing, operating history, and transparency.
- COAs on file
- 22
COAs on file
- Confirmed at the lab
- 0
Confirmed at the lab
- Products
- 23
Products
- Labs
- 1
Labs
2.51/ 10
- Lab credibility and recency55%0.0 (show how this was scored)
- Shipping and refund20%7.5 (show how this was scored)
- Pricing15%4.7 (show how this was scored)
- Operating history5%0.5 (show how this was scored)
- Business transparency5%5.5 (show how this was scored)
Weights are fixed for every vendor. Select a row to see how it was scored.
Testing gate applies (limit 6.50); this score is already below it
Third-party testing not established. The gate records that testing could not be verified; it is not a finding of a quality or safety problem.
Is Stack Research legit?
Stack Research scores 2.51 out of 10 (Poor, #94 of 100) as of November 6, 2026 and does not meet our testing gate: all 22 products we score carry a certificate, none confirmed with the issuing lab. Its strongest area is shipping and refunds (7.5/10) and its weakest is lab testing (0.0/10); its operating history on record covers less than a month. We also record that 22 posted certificates differ from the laboratory's own copy and most of its certificates were issued to another business.
On lab evidence, the heaviest-weighted factor, Stack Research has no third-party testing we could independently verify, with COA work on record from Accumark Labs. The testing gate applies because that testing could not be independently verified (Third-party testing not established); its limit for Stack Research is 6.50, and this score is already below it. Its lowest price per milligram in our data is on NAD+ (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 November 1, 2026. Lab credibility is worked product by product from the certificates on file.
Lab credibility0.0/10
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.
- AOD-96040.0
Certificate from Accumark Labs, tier B+ · tested 2026-03-02
- 0.00: the vendor's posted copy differs materially from the laboratory's own copy (client: the copy the vendor posts prints 'Stack Research LLC' with the vendor's logo and watermark in the client position, where the laboratory's own record for report 2ZEL-XBFX and the laboratory-hosted PDF print the client as 'CnC'; sample name, report ID, lot, dates, identity, purity and quantity are the same)
Certificate from Accumark Labs, tier B+ · tested 2026-02-18
- 0.00: the vendor's posted copy differs materially from the laboratory's own copy (client: the copy the vendor posts prints 'Stack Research LLC' with the vendor's logo and watermark in the client position, where the laboratory's own record for report 7STD-6SRY and the laboratory-hosted PDF print the client as 'CnC'; sample name, report ID, lot, dates, identity, purity and quantity are the same)
- BPC-1570.0
Certificate from Accumark Labs, tier B+ · tested 2026-02-24
- 0.00: the vendor's posted copy differs materially from the laboratory's own copy (client: the copy the vendor posts prints 'Stack Research LLC' with the vendor's logo and watermark in the client position, where the laboratory's own record for report X9RM-SMBN and the laboratory-hosted PDF print the client as 'CnC'; sample name, report ID, lot, dates, identity, purity and quantity are the same)
Certificate from Accumark Labs, tier B+ · tested 2026-02-24
- 0.00: the vendor's posted copy differs materially from the laboratory's own copy (client: the copy the vendor posts prints 'Stack Research LLC' with the vendor's logo and watermark in the client position, where the laboratory's own record for report MHCU-CDXL and the laboratory-hosted PDF print the client as 'CnC'; sample name, report ID, lot, dates, identity, purity and quantity are the same)
- Epitalon0.0
Certificate from Accumark Labs, tier B+ · tested 2026-03-30
- 0.00: the vendor's posted copy differs materially from the laboratory's own copy (client: the copy the vendor posts prints 'Stack Research LLC' with the vendor's logo and watermark in the client position, where the laboratory's own record for report DF9N-8V4E and the laboratory-hosted PDF print the client as 'CnC'; sample name, report ID, lot, dates, identity, purity and quantity are the same)
- GHK-Cu0.0
Certificate from Accumark Labs, tier B+ · tested 2026-06-29
- 0.00: the vendor's posted copy differs materially from the laboratory's own copy (client: the copy the vendor posts prints 'Stack Research LLC' with the vendor's logo and watermark in the client position, where the laboratory's own record for report D69A-YY5F and the laboratory-hosted PDF print the client as 'CnC'; sample name, report ID, lot, dates, identity, purity and quantity are the same)
- GLOW0.0
Certificate from Accumark Labs, tier B+ · tested 2026-03-02
- 0.00: the vendor's posted copy differs materially from the laboratory's own copy (client: the copy the vendor posts prints 'Stack Research LLC' with the vendor's logo and watermark in the client position, where the laboratory's own record for report X7MB-H2H8 and the laboratory-hosted PDF print the client as 'CnC'; sample name, report ID, lot, dates, identity, purity and quantity are the same)
- Semaglutide0.0
Certificate from Accumark Labs, tier B+ · tested 2026-03-02
- 0.00: the vendor's posted copy differs materially from the laboratory's own copy (client: the copy the vendor posts prints 'Stack Research LLC' with the vendor's logo and watermark in the client position, where the laboratory's own record for report WVED-FDT9 and the laboratory-hosted PDF print the client as 'CnC'; sample name, report ID, lot, dates, identity, purity and quantity are the same)
- Tirzepatide0.0
Certificate from Accumark Labs, tier B+ · tested 2026-06-04
- 0.00: the vendor's posted copy differs materially from the laboratory's own copy (client: the copy the vendor posts prints 'Stack Research LLC' with the vendor's logo and watermark in the client position, where the laboratory's own record for report F2NZ-WYSS and the laboratory-hosted PDF print the client as 'C&C'; sample name, report ID, lot, dates, identity, purity and quantity are the same)
- Retatrutide0.0
Certificate from Accumark Labs, tier B+ · tested 2026-06-11
- 0.00: the vendor's posted copy differs materially from the laboratory's own copy (client: the copy the vendor posts prints 'Stack Research LLC' with the vendor's logo and watermark in the client position, where the laboratory's own record for report VMGN-S9MH and the laboratory-hosted PDF print the client as 'CnC'; sample name, report ID, lot, dates, identity, purity and quantity are the same)
- Ipamorelin0.0
Certificate from Accumark Labs, tier B+ · tested 2026-03-16
- 0.00: the vendor's posted copy differs materially from the laboratory's own copy (client: the copy the vendor posts prints 'Stack Research LLC' with the vendor's logo and watermark in the client position, where the laboratory's own record for report TGEV-GJBH and the laboratory-hosted PDF print the client as 'CnC'; sample name, report ID, lot, dates, identity, purity and quantity are the same)
- KLOW0.0
Certificate from Accumark Labs, tier B+ · tested 2026-08-10
- 0.00: the vendor's posted copy differs materially from the laboratory's own copy (client: the copy the vendor posts prints 'Stack Research LLC' with the vendor's logo and watermark in the client position, where the laboratory's own record for report JZ2Y-AD4P and the laboratory-hosted PDF print the client as 'CnC'; sample name, report ID, lot, dates, identity, purity and quantity are the same)
- Melanotan-20.0
Certificate from Accumark Labs, tier B+ · tested 2026-03-16
- 0.00: the vendor's posted copy differs materially from the laboratory's own copy (client: the copy the vendor posts prints 'Stack Research LLC' with the vendor's logo and watermark in the client position, where the laboratory's own record for report A89K-655A and the laboratory-hosted PDF print the client as 'CnC'; sample name, report ID, lot, dates, identity, purity and quantity are the same)
- MOTS-c0.0
Certificate from Accumark Labs, tier B+ · tested 2026-02-24
- 0.00: the vendor's posted copy differs materially from the laboratory's own copy (client: the copy the vendor posts prints 'Stack Research LLC' with the vendor's logo and watermark in the client position, where the laboratory's own record for report N8VT-H88T and the laboratory-hosted PDF print the client as 'CnC'; sample name, report ID, lot, dates, identity, purity and quantity are the same)
- NAD+0.0
Certificate from Accumark Labs, tier B+ · tested 2026-05-04
- 0.00: the vendor's posted copy differs materially from the laboratory's own copy (client: the copy the vendor posts prints 'Stack Research LLC' with the vendor's logo and watermark in the client position, where the laboratory's own record for report XBTB-AFPG and the laboratory-hosted PDF print the client as 'CnC'; sample name, report ID, lot, dates, identity, purity and quantity are the same)
- PT-1410.0
Certificate from Accumark Labs, tier B+ · tested 2026-05-04
- 0.00: the vendor's posted copy differs materially from the laboratory's own copy (client: the copy the vendor posts prints 'Stack Research LLC' with the vendor's logo and watermark in the client position, where the laboratory's own record for report JNQ4-MCV7 and the laboratory-hosted PDF print the client as 'CnC'; sample name, report ID, lot, dates, identity, purity and quantity are the same)
- Selank0.0
Certificate from Accumark Labs, tier B+ · tested 2026-05-04
- 0.00: the vendor's posted copy differs materially from the laboratory's own copy (client: the copy the vendor posts prints 'Stack Research LLC' with the vendor's logo and watermark in the client position, where the laboratory's own record for report 22PB-FQV5 and the laboratory-hosted PDF print the client as 'CnC'; sample name, report ID, lot, dates, identity, purity and quantity are the same)
- Semax0.0
Certificate from Accumark Labs, tier B+ · tested 2026-05-04
- 0.00: the vendor's posted copy differs materially from the laboratory's own copy (client: the copy the vendor posts prints 'Stack Research LLC' with the vendor's logo and watermark in the client position, where the laboratory's own record for report VGU5-X2FK and the laboratory-hosted PDF print the client as 'CnC'; sample name, report ID, lot, dates, identity, purity and quantity are the same)
- Sermorelin0.0
Certificate from Accumark Labs, tier B+ · tested 2026-04-16
- 0.00: the vendor's posted copy differs materially from the laboratory's own copy (client: the copy the vendor posts prints 'Stack Research LLC' with the vendor's logo and watermark in the client position, where the laboratory's own record for report ZYK9-VUZ8 and the laboratory-hosted PDF print the client as 'CnC'; sample name, report ID, lot, dates, identity, purity and quantity are the same)
- TB-5000.0
Certificate from Accumark Labs, tier B+ · tested 2026-02-24
- 0.00: the vendor's posted copy differs materially from the laboratory's own copy (client: the copy the vendor posts prints 'Stack Research LLC' with the vendor's logo and watermark in the client position, where the laboratory's own record for report L5QA-F2S6 and the laboratory-hosted PDF print the client as 'CnC'; sample name, report ID, lot, dates, identity, purity and quantity are the same)
- Tesamorelin0.0
Certificate from Accumark Labs, tier B+ · tested 2026-06-11
- 0.00: the vendor's posted copy differs materially from the laboratory's own copy (client: the copy the vendor posts prints 'Stack Research LLC' with the vendor's logo and watermark in the client position, where the laboratory's own record for report R934-S6U9 and the laboratory-hosted PDF print the client as 'CnC'; sample name, report ID, lot, dates, identity, purity and quantity are the same)
Certificate from Accumark Labs, tier B+ · tested 2026-05-04
- 0.00: the vendor's posted copy differs materially from the laboratory's own copy (client: the copy the vendor posts prints 'Stack Research LLC' with the vendor's logo and watermark in the client position, where the laboratory's own record for report UV7K-ECC6 and the laboratory-hosted PDF print the client as 'CnC'; sample name, report ID, lot, dates, identity, purity and quantity are the same)
Mean of 22 products: 0.0 ÷ 22 = 0.000.
- −0.50SUPPLIER Certificates ordered by a supplier or another client (cap −0.5): all 22 scored Accumark Labs reports (and all 27 in the registry) name the client as CnC or C&C, not Stack Research LLC; the registry states this under each report
0.000 − 0.500 = 0.000 (floored at 0), rounded to 0.1: 0.0/10.
Testing gate: 0 of 22 products have a certificate from a directory laboratory (not tier D, not self-issued) with the key confirmed at the laboratory. That is fewer than half, so the testing cap applies (see the methodology).
Shipping and refunds7.5/10
- +2
Returns and refunds
"A factory-sealed, unused, unaltered product may qualify for return when you request written authorization within 14 calendar days after delivery." ... "After inspection and acceptance, the refund covers the price actually paid for the accepted returned item and applicable tax."
Unopened returns refunded within 14 days of delivery (rule B1: within 7 to 29 days, 2). Opened products are final sale; the customer pays return shipping.
stack-research.com (opens in new tab) source 2 (opens in new tab) source 3 (opens in new tab)checked
- +2
Lost or damaged parcels
"A timely claim may be reviewed when tracking does not show delivery, a parcel or item arrives visibly damaged ..." ... "If a timely claim is verified, Stack Research will determine an appropriate remedy ... The remedy may be replacement or reshipment, credit for the affected amount, refund of the affected amount, or another required remedy."
A replacement, reshipment, credit or refund is stated for both a lost parcel (tracking not showing delivery) and transit damage once the claim is verified (rule B2: 2), as for Ameano Peptides. The policy adds that shipping-protection and carrier claims may be replacement-first and that a carrier or insurance investigation may come first.
stack-research.com (opens in new tab) source 2 (opens in new tab) source 3 (opens in new tab)checked
- 0
Dispatch time
"Processing begins after order acceptance, confirmed payment, any required compliance review, and receipt of complete delivery information. Processing and carrier transit estimates shown at checkout or in an accepted order are not guarantees"
No dispatch time is stated anywhere on the site; the only time given is the carrier transit estimate (FedEx 2Day, two business days after dispatch), with processing time additional (rule B3: 0).
stack-research.com (opens in new tab) source 2 (opens in new tab)checked
- +1
Tracking on all orders
"When tracking is available, it will be sent to the order email after carrier acceptance."
Tracking stated as emailed, "when available" (rule B4: 1).
stack-research.com (opens in new tab) source 2 (opens in new tab)checked
- +1.5
Payment you can dispute
Site header: "Payment options at checkout: Visa, Mastercard, American Express, Bitcoin"; Payment and Billing Policy: "SellAbroad processes supported card payments as the merchant of record ... cryptocurrency payments use a separate NOWPayments invoice."
Cards at checkout through a card merchant of record, with crypto as a separate option (rule B5: 1.5). The Store API cart lists the gateways tagada_inline (card) and nowpayments_gateway (crypto). Checkout itself needs a verified account and was not reached; nothing was added to a cart. Evidence: evidence-local/2026-11-01/stack-research/PAYMENT.
stack-research.com (opens in new tab) source 2 (opens in new tab) source 3 (opens in new tab)checked
- +1
Shipping rates published
"FedEx 2Day shipping is [price] flat for eligible U.S. orders below the free-shipping threshold ... Free standard U.S. shipping is available when discounted merchandise reaches [price]."
A flat rate and a free-shipping threshold are published (rule B6: 1).
stack-research.com (opens in new tab) source 2 (opens in new tab)checked
Total +7.5: 7.5/10.
Pricing4.7/10
We compared Stack Research’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 33% above the market median (ratio 1.33), which the published scale maps to 4.7/10. checked
Operating history0.5/10
Counted from November 1, 2026, the earliest dated evidence of this business operating: 0 months as of November 1, 2026, which the published table maps to 0.5/10.
No record of the kind rule D counts could be found before this audit. Domain stack-research.com was registered 2026-07-22 (Verisign RDAP, registrar Namecheap); the Wayback Machine holds no capture of the store, only three robots.txt captures from January 2008 under an earlier, unrelated registration, so the registration date is not counted. None of the 27 Accumark reports is issued to Stack Research (all name the client CnC or C&C). No dated customer review was found: the site shows none, and Trustpilot answered a plain request with a bot check. The Wyoming registry cannot be read without submitting a search form, and a registry aggregator page for Stack Research LLC answered with a security check. The WordPress product pages carry publication dates of 2026-07-22 and the policies are dated 2026-09-01 and 2026-09-26, but these are the vendor's own page dates, not a record the rule lists. The earliest proven date is this audit, 2026-11-01.
- 2026-07-22 Domain registration: registration 2026-07-22T21:55:45Z, Namecheap; not counted: no archived capture shows content rdap.verisign.com (opens in new tab)
- 2008-01-16 archive: only three robots.txt captures from January 2008 under an earlier registration; no capture of the store (not counted) web.archive.org (opens in new tab)
- 2026-07-22 site: WordPress product records dated 2026-07-22 (vendor's own page dates, context only, not counted) stack-research.com (opens in new tab)
Transparency5.5/10
- +2
Legal entity named
"Stack Research LLC, a Wyoming limited liability company" (footer, policies and About page)
The operating company is named as the seller (rule C1: 2).
stack-research.com (opens in new tab) source 2 (opens in new tab) source 3 (opens in new tab)checked
- +1
Business address
"Registered business address: 30 N Gould St Ste R, Sheridan, WY 82801-6317, USA. Business mailing address: 7901 4th St N #29260, St. Petersburg, FL 33702, USA"; returns: "312 W 2nd St PMB 5016, Casper, WY 82601"
30 N Gould St Ste R is a registered-agent address used by many Wyoming companies; the St. Petersburg address is a numbered mailbox suite and the Casper address is a PMB, which the site itself says "is not a public pickup, fulfillment, inventory, office, or laboratory location". No physical business address is shown (rule C3: 1).
stack-research.com (opens in new tab) source 2 (opens in new tab) source 3 (opens in new tab)checked
- 0
Phone number
No phone number shown; the contact page gives an email address and a form
- 0
Named owner or staff
Authors page: "No individual author or reviewer profile is approved for publication at this time."
No person is named with a role on the site (rule C5: 0). The submission email was signed with a first name only.
stack-research.com (opens in new tab) source 2 (opens in new tab)checked
- +1
Dated terms with a governing law
"Effective September 26, 2026 Site terms v9" ... "These Terms are governed by Wyoming law"
Dated and names a state (rule C6: 1).
- +1.5
Testing lab named, certificates published
COA registry: 27 Accumark Labs reports, each with its report ID, a link to the laboratory's AccuVerify page and a posted PDF
Laboratory named and certificates published (rule C7: 1.5), whatever the certificates score.
Total +5.5: 5.5/10.
- Pricing: every product is on an undated sale not tied to an event or season (the Store API carries a higher regular price that the product pages do not show), so under rule E the sale price is the price at this first review. Single-vial prices read from the Store API and the 24 product pages on 2026-11-01. Not counted under E1: code STACK20 (20% sitewide), the first-order email code, the automatic volume pricing at 3, 5 and 10 vials, and the Stack Builder (12% off 3 items, 18% off 5), all of which need a code or more than one vial. Out of stock and not priced: AOD-9604, Epithalon, PT-141, TB-500, TA-1, the 10 mg + 10 mg BPC-157 with TB-500 vial, the cagrilintide with semaglutide blend and bacteriostatic water.
- Certificates: 27 Accumark Labs reports, each resolved at the laboratory's AccuVerify page on 2026-11-01; every posted PDF differs from the laboratory-hosted PDF in the client line only (rule A4), and every report is issued to another client (rule A7 SUPPLIER).
- Access: stack-research.com answered plain requests; the 21+ researcher affirmation overlay is client-side and the catalogue, registry, PDFs and policies are served beneath it, so nothing was attested. Checkout requires a verified account and was not reached. No form was submitted and nothing was added to a cart.
Shop Stack Research
- Rated 2.51/10 · Poor
- Best value: NAD+ at $0.34/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 · 2.49to2.51
Scores re-checked on 6 November 2026 after the correction review pricing 4.6 to 4.7.
- Audit · Initial audit
lab 0.0 / shipping 7.5 / pricing 4.6 / tenure 0.5 / transparency 5.5. First audit after the vendor's submission. All 22 catalogue products have an Accumark Labs report whose key the laboratory confirms, but each posted copy prints a different client from the laboratory's own copy (rule A4), so every certificate scores 0 and none counts toward the testing gate; every report is issued to another business (rule A7 SUPPLIER, -0.5). No operating history before this audit could be established (rule D).
Editor’s notes
Stack Research sells research peptides at stack-research.com and ships within the United States, from a catalogue of 24 single-vial products that includes retatrutide, tirzepatide and semaglutide under the catalogue names GLP-3 (RT), GLP-2 (TZ) and GLP-1 (SE), with the compound named on each product page. Its public registry lists 27 Accumark Labs reports, one for each configuration on sale, each with a link to the laboratory's own verification page and a posted PDF. All 27 reports resolve at the laboratory, which records purity by HPLC between 98.2% and 99.92%, a measured content for every vial, and an endotoxin and PCR sterility screen on five of them. The laboratory's records name the client as CnC or C&C, not Stack Research, and the registry itself says so; the PDFs the vendor posts print Stack Research LLC in the client position instead, and under our rules a posted copy that differs from the laboratory's copy in the client field scores 0, so none of the 22 catalogue products we list carries a scored certificate and none counts toward the testing gate. Sealed returns are accepted within 14 days of delivery; a lost or damaged parcel reported within 48 hours is replaced, credited or refunded once the claim is verified; no dispatch time is stated; tracking is emailed when available; cards are taken at checkout through a merchant of record, with crypto as an option; and standard shipping is free above an order minimum. The site names Stack Research LLC, a Wyoming company, at a registered-agent address in Sheridan with mailbox addresses in Florida and Casper; it shows no phone number or named person, and its terms are dated and governed by Wyoming law. The store domain was registered in July 2026 with no archived copy, no certificate is issued to the vendor and no dated review was found, so no operating history before this audit could be established. Accumark's records show the same analyses on reports issued to other stores, with the same lot, received date, purity and measured quantity: 20 match FRO Peptides reports and 9 match Zeptix Labs reports. Four of those lots were completed for Zeptix Labs before CnC. The matching reports are not independent tests.
Stack Research 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).
Accumark LabsTier B+tested
- Purity
- 99.727%
- Price per mg
- —
Accumark LabsTier B+tested
- Purity
- 98.63%
- Price per mg
- $9.99$99.90 / 10mg
Accumark LabsTier B+tested
- Purity
- 98.2%
- Price per mg
- $8.99$89.90 / 10mgbest of 2 sizes
Accumark LabsTier B+tested
- Purity
- 99.08%
- Price per mg
- $7.99$79.90 / 10mg
Accumark LabsTier B+tested
- Purity
- 99.44%
- Price per mg
- —
Accumark LabsTier B+tested
- Purity
- 99.815%
- Price per mg
- $1.30$64.90 / 50mg
Accumark LabsTier B+tested
- Purity
- 99.61%
- Price per mg
- $2.14$149.90 / 70mg
Accumark LabsTier B+tested
- Purity
- 99.57%
- Price per mg
- $11.99$119.90 / 10mgbest of 2 sizes
Accumark LabsTier B+tested
- Purity
- 99.81%
- Price per mg
- $7.33$219.90 / 30mgbest of 2 sizes
Accumark LabsTier B+tested
- Purity
- 99.9%
- Price per mg
- $8.33$249.90 / 30mgbest of 2 sizes
Accumark LabsTier B+tested
- Purity
- 99.453%
- Price per mg
- $8.98$44.90 / 5mg
Accumark LabsTier B+tested
- Purity
- 99.89%
- Price per mg
- $2.00$159.90 / 80mg
Accumark LabsTier B+tested
- Purity
- 99.075%
- Price per mg
- $5.49$54.90 / 10mg
Accumark LabsTier B+tested
- Purity
- 99.84%
- Price per mg
- $9.99$99.90 / 10mg
Accumark LabsTier B+tested
- Purity
- 99.68%
- Price per mg
- $0.34$169.90 / 500mg
Accumark LabsTier B+tested
- Purity
- 99.92%
- Price per mg
- —
Accumark LabsTier B+tested
- Purity
- 99.81%
- Price per mg
- $9.98$49.90 / 5mg
Accumark LabsTier B+tested
- Purity
- 99.57%
- Price per mg
- $2.66$79.90 / 30mg
Accumark LabsTier B+tested
- Purity
- 99.08%
- Price per mg
- $10.98$54.90 / 5mg
Accumark LabsTier B+tested
- Purity
- 99.1%
- Price per mg
- —
Accumark LabsTier B+tested
- Purity
- 99.36%
- Price per mg
- $9.99$99.90 / 10mg
Accumark LabsTier B+tested
- Purity
- 99.18%
- Price per mg
- —
- Purity
- —
- Price per mL
- —
Learn more about what Stack Research carries
Rated higher than Stack Research, with a reader code
Stack Research 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.
7.73/10 · Strong · carries 20 of the same products
7.42/10 · Strong · carries 21 of the same products
5.95/10 · Fair · carries 21 of the same products
Stack Research: Frequently Asked Questions
Is Stack Research legit?
Stack Research scores 2.51 out of 10 (Poor, #94 of 100) as of November 6, 2026 and does not meet our testing gate: all 22 products we score carry a certificate, none confirmed with the issuing lab. Its strongest area is shipping and refunds (7.5/10) and its weakest is lab testing (0.0/10); its operating history on record covers less than a month. We also record that 22 posted certificates differ from the laboratory's own copy and most of its certificates were issued to another business.
Is there a Stack Research promo code, coupon code, or discount code?
We do not have a verified Stack Research promo code or coupon code right now. When Stack Research runs a sale or issues a discount code, we post it here and on our promos page, so bookmark this page for the latest Stack Research discount.
Does Stack Research use third-party lab testing?
Not to our verification standard. Fewer than half of this vendor's scored products have a certificate from an independent laboratory in our directory (not tier D) whose verification key we confirmed at that laboratory, so the testing gate applies. This records what we could verify; it is not a finding of a quality or safety problem. Laboratories on the certificates we hold: Accumark Labs.
Where can I see Stack Research's COAs?
In the "Stack Research COAs and lab test results" table on this page. We hold 22 certificates for Stack Research, covering 22 of the 23 products we track, issued by Accumark Labs. None of them has yet been confirmed at the issuing laboratory. Each row links the certificate, its lab, its test date and the purity it reports.
What peptides does Stack Research carry?
Stack Research carries AOD-9604, BPC-157 + TB-500, BPC-157, CJC-1295 + Ipamorelin, Epitalon, GHK-Cu, GLOW, Semaglutide, and 15 more. Current per-milligram pricing, COA links, and verification keys for each are in the comparison table on this page.
Is the Stack Research 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.
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Stack Research2.51Poor