Capstone Peptides Coupon Code: PROFPEPTIDE — Save 50%
capstonepeptides.com
Updated
Use discount code PROFPEPTIDE at Capstone Peptides to save 50% on your order (one use per customer). Prof. Peptide verifies this code directly with the vendor and updates it when it changes.
Capstone Peptides is a research peptide supplier run by Capstone Holdings LLC, shipping within the United States; Prof. Peptide matched all 26 of its Accumark Labs certificates at the laboratory's own lookup.
Key facts
- Price comparison
- 3 of 22 comparable products cost less than the median for the same product and size across every vendor Prof. Peptide tracks — before the code
- Catalog
- 29 products at the 2026-10-24 pull · 22 in Prof. Peptide’s price comparison, 22 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
- Prof. Peptide’s discount
- 50% off with code PROFPEPTIDE — one use per customer
- Code checked
- Prof. Peptide confirmed this rate on October 13, 2026.
Compare Capstone Peptides’ prices: cagrisema, Semax, Semaglutide, Tirzepatide, Thymosin Alpha-1, Retatrutide, Epitalon, Ipamorelin
Overview
Capstone Peptides sells single compounds and two-component blends, every one supplied as lyophilized (freeze-dried) powder, for laboratory research. It ships within the United States and quotes bulk and wholesale pricing by email.
Capstone Peptides catalog & prices
Capstone Peptides carries single research compounds and five two-component blends. The compounds are grouped below by Prof. Peptide's research-library categories.
- Metabolic & GLP-1
- Semaglutide (CP-1S), Tirzepatide (CP-2T), Retatrutide (CP-3R), CagriSema (sold as CAG / CP-1S), MOTS-C, AOD-9604
- Recovery & Tissue Repair
- BPC-157, TB-500, Wolverine Stack (a blend of BPC-157 and TB-500)
- Growth Hormone
- GH Stack (a blend of CJC-1295 and Ipamorelin), Ipamorelin, Tesamorelin (CP-TESA), Sermorelin
- Skin Health & Anti-Aging
- GLOW, Melanotan II (Melanotan 2)
- Gut Health & Immunity
- Thymosin Alpha-1
- Sexual Health
- PT-141
Four compounds carry Capstone's own codes on its storefront: semaglutide is CP-1S, tirzepatide is CP-2T, retatrutide is CP-3R and tesamorelin is CP-TESA, and the CAG / CP-1S blend is cagrilintide with semaglutide. Each is identified from its Accumark Labs certificate, which names the compound outright. CJC-1295 is sold only in the blend of CJC-1295 and Ipamorelin blend, whose certificate gives it as CJC-1295 without DAC.
Struck-through prices are Capstone Peptides’ list price; the bold figure is the price once code PROFPEPTIDE is applied at checkout — one use per customer. Prices current as of October 24, 2026.
Testing: Labs & Certificates of Analysis
Capstone Peptides publishes its certificates on a lab-testing page that lists each one with its product, purity, lot, a PDF copy and an AccuVerify code, and Prof. Peptide counted 26 there on 7 October 2026. Capstone states that every compound it sells is third-party tested by Accumark Labs, that 100% of its peptide lots are tested, and a 98%+ purity standard.
All 26 certificates were checked at Accumark Labs' own lookup on 7 October 2026. Each returned a record naming Capstone Peptides as the client, with the same lot and purity as the lab-testing page, which rounds three of the purities to two decimal places. Every record reports HPLC purity, identity and a measured quantity, with analysis completed on July 23, 2026, and every purity is at or above Capstone's 98% standard, the lowest being 98.2%. Three — CP-2T 30 mg, CP-3R 10 mg and CP-TESA 10 mg — also report an endotoxin screen and a PCR sterility screen.
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.
Prof. Peptide Verification
Verified · 7 October 2026
Prof. Peptide identified the lab, matched the certificates on its own website, and read every test result.
Lab identified
PassedCertificates verified
Passed3 of 3 matched on Accumark Labs’ own website.
The three certificates were tested on 23 July 2026.
AOD-9604 5 mg · lot 1060
PassedAccumark Labs · tested 23 July 2026 · certificate GDH8-X86G
- Passed: AOD-9604 - Purity — 99.727% (spec > 98.0%) · Conforms
- Passed: AOD-9604 - Identity — AOD-9604 (spec AOD-9604) · Conforms
- Passed: AOD-9604 - Quantity — 5.91 mg (spec MEASURED) · Measured (at least 90% of the labeled 5 mg)
Selank 5 mg · lot 1230
PassedAccumark Labs · tested 23 July 2026 · certificate 269J-8JYX
- Passed: Selank - Purity — 99.81% (spec > 98.0%) · Conforms
- Passed: Selank - Identity — Selank (spec Selank) · Conforms
- Passed: Selank - Quantity — 7.88 mg (spec MEASURED) · Measured (at least 90% of the labeled 5 mg)
Tirzepatide (CP-2T) 10 mg · lot 1600
PassedAccumark Labs · tested 23 July 2026 · certificate JXXG-KY8J
- Passed: Tirzepatide - Purity — 99.75% (spec > 98.0%) · Conforms
- Passed: Tirzepatide - Identity — Tirzepatide (spec Tirzepatide) · Conforms
- Passed: Tirzepatide - Quantity — 12.49 mg (spec MEASURED) · Measured (at least 90% of the labeled 10 mg)
Payment and shipping
Capstone Peptides ships within the United States only, by FedEx 2-Day at a flat $12.99, and free on orders over $100. It states that orders ship within one business day of payment confirmation, that most arrive within three business days, and that orders are not processed on weekends or holidays. Orders go out in plain packaging, and the lyophilized powder ships at room temperature without cold packs. Capstone Peptides accepts all major credit cards, bank transfer (ACH), Zelle and crypto, according to the vendor.
Capstone Peptides states that all sales are final, with no refunds and no returns. Its one remedy is a single reshipment when an order arrives damaged or incorrect, or is confirmed lost by the carrier, reported to support@capstonepeptides.com within 7 days of delivery (or of expected delivery, for a lost order) with the order number and photos.
Customer service
Customer service is reached through the chat on the site, through the contact form on the contact page, by email at support@capstonepeptides.com, by phone on 703-679-8402, or on Telegram, through the @capstonepeptides account and the @capstonepeptideschat chat. Capstone Peptides states that it replies to the form within 24 hours on business days, Monday to Friday, and that it does not give dosing or medical guidance.
Online reviews
Prof. Peptide checked Trustpilot on 20 October 2026: 3.7 TrustScore from 1 review. Prof. Peptide checked Finnrick on 20 October 2026. Finnrick’s page for Capstone Peptides reads: “Not enough classifiable tests to rate this vendor yet.”
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Affiliate disclosure: Prof. Peptide is independently operated and may earn affiliate commissions on purchases made with its codes or through its links, at no additional cost to the buyer. Affiliate relationships never determine vendor inclusion, ranking, verification, or Prof. Peptide's editorial conclusions.