Capstone Peptides Discount Code: PROFPEPTIDE — Save 50%
Use coupon code PROFPEPTIDE at Capstone Peptides to save 50% on your order. Prof. Peptide verifies this code directly with the vendor and updates it when it changes.
Key facts
- Price comparison
- 11 of 26 comparable products cost less than the median for the same product and size across every vendor PP tracks — before the code
- Catalog
- 29 products at the 2026-09-28 pull · 26 in Prof. Peptide’s price comparison, 26 of those in stock · Lyophilized powder, in single vials and multi-component vials
- Third-party testing
- Accumark Labs
- Certificates of analysis
- Every compound’s certificate published on the vendor’s COA page as a live record on the testing laboratory’s own system rather than a file the vendor hands over; the vendor states no count
- Prof. Peptide’s discount
- 50% off with code PROFPEPTIDE
Compare Capstone Peptides’s prices: Thymosin Alpha-1, Retatrutide, cagrisema, TB-500, Tirzepatide, Semax, Tesamorelin, Sermorelin
Capstone Peptides (capstonepeptides.com) is a US-based research-compound supplier that ships domestically. Its catalog and per-vial prices are openly browsable without an account, and every compound it sells carries a batch certificate in a public Certificate of Analysis library. Compounds by research area:
- Metabolic & GLP-1
- Semaglutide (CP-1S), Tirzepatide (CP-2T), Retatrutide (CP-3R), Cagrilintide (in the CAG / CP-1S blend), MOTS-C
- Recovery & Tissue Repair
- BPC-157, TB-500, BPC-157 + TB-500 blend, GLOW
- Growth Hormone
- CJC-1295, Ipamorelin, Tesamorelin, Sermorelin
- Skin Health & Anti-Aging
- Melanotan 2
- Longevity & Immune
- Epithalon, NAD+, Thymosin Alpha-1
- Sexual Health
- PT-141
Capstone sells semaglutide as CP-1S, tirzepatide as CP-2T and retatrutide as CP-3R; the CAG / CP-1S blend is cagrilintide with semaglutide.
Every compound Capstone sells carries a batch certificate from Accumark Labs, published in a public COA library. Of the 25 compounds in the catalog, 24 link their certificate directly from the product page and the library; the Retatrutide 30 mg certificate (lot 1051, purity 99.52%) is verifiable by its AccuVerify code. Each certificate carries a QR code and a per-record code that resolve to Accumark Labs’ own verification page at accumarklabs.com/accuverify — the check runs against the laboratory, not against Capstone. The certificate we reviewed — a 30 mg Retatrutide lot — is a core-panel report covering identity (confirmed Retatrutide), purity (99.52% against a >98.0% specification), and quantity; it does not include endotoxin, heavy-metal, or sterility testing.
Three details from the certificate itself are worth noting. Net peptide content is measured rather than assumed — the 30 mg Retatrutide lot assays at 30.97 mg per vial. The report renders from the laboratory’s LIMS rather than as a PDF, with a result hash anchored at finalization, so there is no file to edit or swap. And verification resolves on the laboratory’s own domain rather than through a vendor-hosted QR code.
One point of context: Accumark Labs does not print a laboratory accreditation on its certificates, so no accreditation is claimed here — the strength of the record is the independent, externally verifiable check on the lab’s own domain, not a printed accreditation. Capstone is US-based and ships domestically. All products are sold for laboratory and research use only. Capstone Peptides accepts card, Apple Pay, Google Pay, Zelle, bank payment and crypto at checkout.
Capstone Peptides catalog & prices
Struck-through prices are Capstone Peptides’ list price; the bold figure is your price once you apply code PROFPEPTIDE at checkout. Prices current as of September 28, 2026.
Prof. Peptide checked Trustpilot and Finnrick on 30 September 2026. Trustpilot: 3.7 from 1 review (read 30 September 2026).
Frequently Asked Questions
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Affiliate disclosure: Prof. Peptide is independently operated and may earn affiliate commissions when you use our discount codes or buy through our links, at no additional cost to you. Affiliate relationships never determine vendor inclusion, ranking, verification, or our editorial conclusions.