Capstone Peptides Coupon Code: PROFPEPTIDE — Save 50%
Use discount code PROFPEPTIDE at Capstone Peptides to save 50% on your order (one use per customer). Prof. Peptide confirmed this rate on October 13, 2026.
Key facts
- Price comparison
- 1 of 22 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 2026-10-16 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; the vendor states no count
- Prof. Peptide’s discount
- 50% off with code PROFPEPTIDE — one use per customer
Compare Capstone Peptides’ prices: cagrisema, Semax, Retatrutide, Tirzepatide, Epitalon, Thymosin Alpha-1, Tesamorelin, Sermorelin
Overview
Capstone Peptides (capstonepeptides.com), operated by Capstone Holdings LLC, is a US research-peptide supplier that ships within the United States only. It sells single compounds and two-component blends, every one supplied as lyophilized (freeze-dried) powder, to customers 21 and over for laboratory research, 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 (CAG / CP-1S), MOTS-C, AOD-9604
- Recovery & Tissue Repair
- BPC-157, TB-500, Wolverine Stack (BPC-157 + TB-500)
- Growth Hormone
- GH Stack (CJC-1295 + 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 CJC-1295 + Ipamorelin blend, whose certificate gives it as CJC-1295 without DAC.
Struck-through prices are Capstone Peptides’ list price; the bold figure is your price once you apply code PROFPEPTIDE at checkout — one use per customer. Prices current as of October 16, 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. An invented code was tried first, and the lookup found no certificate for it, so a match means something.
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
We identified the lab, matched the certificates on its own website, and read every test result.
Lab identified
PassedAccumark Labs
Certificates verified
Passed3 of 3 matched on Accumark Labs’ own website, and the same lookup rejected a made-up code.
All three certificates were tested on 23 July 2026.
Core Panel Results
PassedEvery component of the Core Panel Results, as the certificates name it.
- Passed: AOD-9604 - Purity — 99.727% (limit > 98.0%) — against 98%, the vendor’s own standardReported on AOD-9604 5 mg (lot 1060) only.
- Passed: AOD-9604 - Identity — AOD-9604 (limit AOD-9604)Reported on AOD-9604 5 mg (lot 1060) only.
- No specification printed: AOD-9604 - Quantity — 5.91 mg (limit MEASURED)Reported on AOD-9604 5 mg (lot 1060) only.
- Passed: Selank - Purity — 99.81% (limit > 98.0%) — against 98%, the vendor’s own standardReported on Selank 5 mg (lot 1230) only.
- Passed: Selank - Identity — Selank (limit Selank)Reported on Selank 5 mg (lot 1230) only.
- No specification printed: Selank - Quantity — 7.88 mg (limit MEASURED)Reported on Selank 5 mg (lot 1230) only.
- Passed: Tirzepatide - Purity — 99.75% (limit > 98.0%) — against 98%, the vendor’s own standardReported on Tirzepatide (CP-2T) 10 mg (lot 1600) only.
- Passed: Tirzepatide - Identity — Tirzepatide (limit Tirzepatide)Reported on Tirzepatide (CP-2T) 10 mg (lot 1600) only.
- No specification printed: Tirzepatide - Quantity — 12.49 mg (limit MEASURED)Reported on Tirzepatide (CP-2T) 10 mg (lot 1600) only.
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 7 October 2026 and Finnrick on 30 September 2026. Trustpilot: 3.7 TrustScore from 1 review — the review itself is 5 stars (read 7 October 2026).
Bought from Capstone Peptides? Tell Prof. Peptide how it went.
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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.