Synthesis Peptides Discount Code: PROFPEPTIDE — Save 10%
synthesispeptides.co
Updated
Use coupon code PROFPEPTIDE at Synthesis Peptides to save 10% on your order. Prof. Peptide verifies this code directly with the vendor and updates it when it changes.
Synthesis Peptides is a research peptide supplier based in Las Vegas, Nevada, that ships within the United States; Prof. Peptide randomly selected three of its Freedom Diagnostics certificates and matched each one against the laboratory's own records.
Key facts
- Price comparison
- 8 of 32 comparable products cost less than the median for the same product and size across every vendor Prof. Peptide tracks — before the code
- Catalog
- 47 products at the 2026-10-24 pull · 32 in Prof. Peptide’s price comparison, 32 of those in stock · Vials, plus a tablet line
- Third-party testing
- Freedom Diagnostics
- Certificates of analysis
- Certificate published for every batch, surfaced on the vendor’s own site with the peptide content stated on each
- Prof. Peptide’s discount
- 10% off with code PROFPEPTIDE
- Code checked
- Prof. Peptide confirmed this rate on October 13, 2026.
Compare Synthesis Peptides’ prices: 5-Amino-1MQ, Tirzepatide, Melanotan II, Semax, Selank, GHK-Cu, BPC-157, Cagrilintide
Overview
Synthesis Peptides sells lyophilized research peptides, blends and oral research tablets from synthesispeptides.co, and ships from Las Vegas, Nevada, to buyers in the United States. Synthesis Peptides states that it was founded by a disabled combat veteran. Its certificate library lists the certificates for its batches by product and lot.
Synthesis Peptides catalog & prices
The compounds are grouped below by Prof. Peptide's research-library categories.
- Metabolic & GLP-1
- Semaglutide (SYN-1SG), Tirzepatide (SYN-2TZ), Retatrutide (SYN-3RT), Cagrilintide, MOTS-c, AOD-9604, a blend of 5-Amino-1MQ, MOTS-c and NAD+
- Recovery & Tissue Repair
- BPC-157, TB-500, a blend of BPC-157 and TB-500, ARA-290
- Growth Hormone
- a blend of CJC-1295 (no DAC) and Ipamorelin, Ipamorelin, Sermorelin, Tesamorelin, a blend of Tesamorelin and Ipamorelin
- Performance & Energy
- IGF-1 LR3
- Skin Health & Anti-Aging
- GHK-Cu, GLOW 70, KLOW 80, Melanotan 1, Melanotan 2, Glutathione
- Gut Health & Immunity
- KPV, Thymosin Alpha-1
- Sexual Health
- PT-141
- Also listed
- 5-Amino-1MQ and SLU-PP-332 tablets; GHK-Cu hair and skin products; L-carnitine, B12 and Lipo-C with B12; reconstitution solutions and acetic acid
Its incretin line is sold under codes: SYN-1SG is semaglutide, SYN-2TZ is tirzepatide and SYN-3RT is retatrutide, as the CAS number printed on each product page shows.
Struck-through prices are Synthesis Peptides’ list price; the bold figure is the price once code PROFPEPTIDE is applied at checkout. Prices current as of October 24, 2026.
Testing: Labs & Certificates of Analysis
Synthesis Peptides states that it publishes a certificate of analysis for every batch, showing the peptide content per vial, and that each certificate lists the batch's purity, typically 98% or higher. Its certificate library is searchable by product name or lot number.
On October 11, 2026 Prof. Peptide drew three certificates from the library, Cartalax 20mg, Selank 30mg and Retatrutide 10mg, and found each one at Freedom Diagnostics' own document store, naming Synthesis Peptides as the client.
Prof. Peptide Verification
Verified · 11 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 Freedom Diagnostics’ own website.
The three certificates were tested on 15 August and 23 August 2026.
Cartalax 20mg · lot LAX20926
PassedFreedom Diagnostics · tested 23 August 2026 · certificate SYNT2608180501
- Passed: Identity (LC-MS) — Cartalax (names the labeled compound)
- Passed: Purity (HPLC-UV) — 99.75% (against ≥98%, Prof. Peptide’s standard; the certificate prints no specification)
- Passed: Net Content — 21.05 mg (at least 90% of the labeled 20 mg)
- Passed: Appearance — White Lyophilized Powder (the expected white lyophilized form)
- Passed: Elemental Impurities (ICP-MS) — Pass — Arsenic, Cadmium, Lead, and Mercury below reporting/specification limits
- Passed: Endotoxin Replicate 1 — Pass (spec Assay Sensitivity: ≤0.05 EU/mL)
- Passed: Endotoxin Replicate 2 — Pass (spec Assay Sensitivity: ≤0.05 EU/mL)
- Passed: Microbial Analysis (PCR) — No Detectable Microbial DNA (a clear negative, as printed)
- Passed: Fentanyl — No Fentanyl Detected (a clear negative, as printed)
- Passed: Identity — Confirmed
RETATRUTIDE 10mg · lot ORB-3R1096
PassedFreedom Diagnostics · tested 23 August 2026 · certificate SYNT2608180468
- Not graded, the laboratory prints “GLP RT”, not a compound name: Identity (LC-MS) — GLP RT
- Passed: Purity (HPLC-UV) — 99.83% (against ≥98%, Prof. Peptide’s standard; the certificate prints no specification)
- Passed: Net Content — 12.51 mg (at least 90% of the labeled 10 mg)
- Passed: Appearance — White Lyophilized Powder (the expected white lyophilized form)
- Passed: Elemental Impurities (ICP-MS) — Pass — Arsenic, Cadmium, Lead, and Mercury below reporting/specification limits
- Passed: Endotoxin Replicate 1 — Pass (spec Assay Sensitivity: ≤0.05 EU/mL)
- Passed: Endotoxin Replicate 2 — Pass (spec Assay Sensitivity: ≤0.05 EU/mL)
- Passed: Microbial Analysis (PCR) — No Detectable Microbial DNA (a clear negative, as printed)
- Passed: Fentanyl — No Fentanyl Detected (a clear negative, as printed)
- Passed: Identity — Confirmed
Selank 30mg · lot SEL30926
PassedFreedom Diagnostics · tested 15 August 2026 · certificate SYNT2608110654
- Passed: Identity (LC-MS) — Selank (names the labeled compound)
- Passed: Purity (HPLC-UV) — 99.68% (against ≥98%, Prof. Peptide’s standard; the certificate prints no specification)
- Passed: Net Content — 32.20 mg (at least 90% of the labeled 30 mg)
- Passed: Appearance — White Lyophilized Powder (the expected white lyophilized form)
- Passed: Elemental Impurities (ICP-MS) — Pass — Arsenic, Cadmium, Lead, and Mercury below reporting/specification limits
- Passed: Endotoxin Replicate 1 — Pass (spec Assay Sensitivity: ≤0.05 EU/mL)
- Passed: Endotoxin Replicate 2 — Pass (spec Assay Sensitivity: ≤0.05 EU/mL)
- Passed: Microbial Analysis (PCR) — No Detectable Microbial DNA (a clear negative, as printed)
- Passed: Fentanyl — No Fentanyl Detected (a clear negative, as printed)
- Passed: Identity — Confirmed
All products are sold for laboratory research use only.
Payment and shipping
Synthesis Peptides ships within the United States only, from Las Vegas, Nevada. Shipping is free on orders over $250, and package protection against loss or damage in transit is an optional add-on at checkout. Synthesis Peptides accepts Visa, Mastercard, American Express, Discover and PayPal per its FAQ.
All sales are final. A defective or incorrect order is resolved with a replacement, a partial refund or store credit, and an order can be cancelled within 1 hour of placing it. Military personnel and first responders get 20% off with a one-time code after verifying through VerifyPass.
Customer service
Support runs by email at support@synthesispeptides.io, by WhatsApp chat at +1 (702) 780-6568 and through the contact page on its site, with a typical reply within 1 business day.
Ratings & reviews
Prof. Peptide checked Trustpilot on 20 October 2026: Synthesis Peptides has no Trustpilot profile. Prof. Peptide checked Finnrick on 20 October 2026. Finnrick’s page for Synthesis 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.