Peptide Maxxing Review: Pricing, COAs, Testing, and What We Found
An independent Peptide Maxxing review covering openly priced research vials, RT / TZ / SM / CAG house labels, U.S. fulfillment claims, and Freedom Diagnostics, Janoshik, and ILS Laboratories certificates on the public /coa page.
Peptide Maxxing is now a curated vendor on PeptideBenchmark. That decision rests on what a reader can check without guessing — public prices, milligram strengths, house-label mappings, and certificates on a public COA page that resolve at Freedom Diagnostics, Janoshik, and ILS Laboratories.
Reviewed September 18, 2026. PeptideBenchmark has no affiliate, coupon, sponsorship, or paid-placement relationship with Peptide Maxxing. The vendor sells research-use-only products; this is a commercial-transparency and documentary-evidence review, not human-use guidance or medical advice.
The short version
We found a research storefront with:
- openly priced single-vial strengths on the public catalog;
- house labels RT Series, TZ Series, SM Series, and CAG Series for retatrutide, tirzepatide, semaglutide, and cagrilintide;
- U.S.-finished marketing language and a 561-area support line (no city/street address published);
- Freedom Diagnostics purity/content images, Janoshik endotoxin reports, and ILS Laboratories HPLC certificates on the public /coa page that resolve under Peptide Maxxing where laboratory lookup succeeds;
- certificate coverage for most, but not all, catalog SKUs.
The catalog is usable for $/mg comparison without an account. Certificates are centralized on /coa rather than scattered only across product galleries. PeptideBenchmark confirms Freedom Diagnostics search codes, exact Janoshik verification URLs, and ILS Access Code / QR portal routes independently; a matched report documents the tested sample and does not endorse every vial. Marketing purity language is not the same thing as a published certificate for every SKU.
What we found in the catalog
Peptide Maxxing lists live prices and milligram strengths on its public catalog. PeptideBenchmark compares those single-vial offers per mg on Pricing and Stack Builder. Ranking uses the regular listed price with the charged one-vial sale joined as an observed sale; a standing 8% / 40% quantity ladder at 5 and 10 vials is modeled separately. The weekend MITO30 mitochondrial overlay is a dated vendor promotion, not a standing ranking discount.
| Catalog result | Count | PB treatment |
|---|---|---|
| Public product rows audited | 60 | Kept in the catalog check |
| Comparable in-stock vial rows | 45 | Published to Pricing and Stack Builder |
| Out of stock | 3 | CJC-1295 No DAC 5 mg, CJC-1295 with DAC 5 mg, MOTS-c 40 mg |
| Deferred | 4 | Pre-filled unit packs (BPC-157 500 mcg units, GHK-Cu 2 mg units, SLU-PP-332 250/1000 mcg units) |
| Outside the vial lane at review time | 8 | Aqueous solutions, reconstitution supplies, and IU-labeled HMG |
In the September 18, 2026 unified-pricing snapshot, HMG 75 IU appears in IU hormones, separate from vial $/mg. The other seven rows in that dated group remain outside those supported comparisons.
House labels matter here:
- RT Series → retatrutide
- TZ Series → tirzepatide
- SM Series → semaglutide
- CAG Series → cagrilintide
- RT + CAG / SM + CAG → retatrutide/cagrilintide and semaglutide/cagrilintide blends
Blend totals on the labeled vials include GLOW 70 mg, KLOW 80 mg, BPC/TB 10 mg and 20 mg, and CJC/Ipamorelin 10 mg.
Current offers can be compared on PeptideBenchmark Pricing, and mixed-product requirements can be modeled in the Stack Builder.
Testing transparency
Browse preserved records in the Peptide Maxxing COA results.
The public /coa page and matching product certificates publish Freedom Diagnostics purity/content images, Janoshik endotoxin reports, and ILS Laboratories HPLC certificates. PeptideBenchmark confirmed 84 of 85 reviewed certificate origins against those laboratories under the Peptide Maxxing client name: 40 Freedom Diagnostics, 41 Janoshik, and 4 ILS. One Freedom search code (RT Series 30 mg, Pept2609010720) still has no laboratory-hosted PDF and remains a vendor-hosted image only. Gonadorelin, Pinealon, and SM + CAG currently have no published test result.
A matched laboratory report documents purity, identity, and often net content or endotoxin for the tested sample. It is not a sterility or heavy-metals guarantee, and it does not cover catalog products that still lack a published certificate image.
Location and fulfillment claims
Public About and contact copy states:
- Positioning: U.S.-manufactured / U.S.-finished research peptides
- Support: [email protected] · +1 (561) 800-8146
No city or street-level address was published for PeptideBenchmark to verify. PeptideBenchmark maps only the country-level operating signal.
What this review does not claim
- No binary “safe / unsafe” or “legitimate / illegitimate” verdict
- No endorsement of human use
- No claim that every SKU has a currently resolvable laboratory report
- No claim that a matched COA proves the vial you receive matches the tested lot
- No PeptideBenchmark affiliate, coupon, or sponsorship relationship
Related PeptideBenchmark pages
- Peptide Maxxing vendor profile
- Peptide Maxxing COA database filter
- Pricing board
- Stack Builder
- How vendor scoring works
- Official Peptide Maxxing site
Common questions
Is Peptide Maxxing legitimate?
PeptideBenchmark does not issue binary legitimacy or product-safety endorsements. We confirmed an openly priced research catalog, U.S.-finished marketing language, a 561-area support line, and public certificate images that resolve at Freedom Diagnostics under Peptide Maxxing, at exact Janoshik verification URLs, and at ILS Laboratories portal routes. Those facts create an inspectable commercial and documentary record; they do not establish the condition or safety of a physical vial.
Does Peptide Maxxing publish COAs?
Yes. The public /coa page and matching product certificates publish Freedom Diagnostics purity/content images, Janoshik endotoxin reports, and ILS Laboratories HPLC certificates. PeptideBenchmark confirmed 84 of 85 reviewed certificate origins against those laboratories. Products without a published certificate image are not counted as tested in our evidence set.
What do RT Series, TZ Series, SM Series, and CAG Series mean?
They are Peptide Maxxing storefront labels. PeptideBenchmark maps RT Series to retatrutide, TZ Series to tirzepatide, SM Series to semaglutide, and CAG Series to cagrilintide for cross-vendor comparison.
Where is Peptide Maxxing based?
Public About and contact copy describe U.S.-manufactured/finished research peptides, [email protected], and +1 (561) 800-8146, without publishing a city or street-level address PeptideBenchmark could verify.
Does PeptideBenchmark have an affiliate relationship with Peptide Maxxing?
No. PeptideBenchmark has no affiliate, coupon, sponsorship, or paid-placement relationship with Peptide Maxxing. The vendor publishes its own affiliate program; that is not a PeptideBenchmark offer.