Midwest Peptide Coupon Code — 40% Off
Reveal your discount code below to save 40% at Midwest Peptide. Prof. Peptide verifies this code directly with the vendor and updates it when it changes.
Your Discount Code
See offer (opens Midwest Peptide in a new tab)Key facts
- Price comparison
- 13 of 19 comparable products cost less than the median for the same product and size across every vendor Prof. Peptide tracks — before the code
- Catalog
- 36 products at the 2026-10-16 pull · 19 in Prof. Peptide’s price comparison, 19 of those in stock · Vials of lyophilized powder, plus a peptide capsule range
- Third-party testing
- Precision Mass Spec, ILS Laboratories & Freedom Diagnostics
- Certificates of analysis
- Certificate published on each product’s own page, reachable from a public COA directory covering the catalog
- Prof. Peptide’s discount
- Press See offer above for the best current offer, including Prof. Peptide’s code
- Code checked
- Prof. Peptide confirmed this rate on October 13, 2026.
Compare Midwest Peptide’s prices: Selank, Tirzepatide, Semax, Melanotan II, GHK-Cu, Cagrilintide, BPC-157, MOTS-C
The Midwest Peptide coupon code, discount code and promo code are three names for the same string. Reveal it above — whether you searched for a midwestpeptide coupon or a Midwest Peptide promo code, this is the one Prof. Peptide maintains with the vendor.
Midwest Peptide (midwestpeptide.com) is a US-based research-peptide vendor operated by Midwest BioResearch LLC and based in Mission, Kansas. It supplies research-use-only peptides across metabolic, recovery, growth-hormone, skin, cognitive, sleep, longevity, and sexual-health research. Popular compounds by research area:
- Metabolic & GLP-1
- Retatrutide, Tirzepatide, Semaglutide, Cagrilintide, MOTS-C, 5-Amino-1MQ
- Growth Hormone
- CJC-1295 (No DAC), Tesamorelin, a blend of CJC-1295 (No DAC) and Ipamorelin, a blend of Tesamorelin and Ipamorelin
- Skin Health & Anti-Aging
- GHK-Cu, Melanotan I, Melanotan II, GLOW, KLOW
- Sleep & Recovery
- DSIP
- Longevity
- NAD+, Glutathione
- Sexual Health
- PT-141
- Also carried
- SS-31 (Elamipretide), VIP, plus capsule formats of GHK-Cu and BPC-157
Every product ships research-use-only with a batch-specific Certificate of Analysis published on its product page. Current batches are tested by ILS Laboratories (San Diego, CA) under a full QC panel — identity by mass spectrometry, purity by RP-HPLC with UV detection (99%+), quantity, sterility (PCR), endotoxins (LAL), heavy metals (ICP-MS, USP <233>), and a fentanyl screen — and each COA carries a QR code and access code that verify it at portal.ils-lab.com. Some earlier batches were tested by Freedom Diagnostics (identity by LC-MS, purity by HPLC-UV), verifiable by search code at FreedomDiagnosticsTesting.com. As of 14 October 2026, Midwest Peptide's certificates couldn't be checked at the lab's own records.
Midwest Peptide states that shipping is free on orders of $75 or more, that orders placed before 2:00 PM CST Monday to Friday ship the same business day, and that standard orders go by UPS or USPS and typically arrive in 3–5 business days within the United States. Midwest Peptide states that it accepts Zelle, paid straight from a banking app, and that bulk orders get 8% off at $150, rising to 12% at $225, 15% at $325 and 20% at $450. Questions can be directed to info@midwestpeptide.com.
Midwest Peptide is running its own Harvest sale through Monday, October 19, 2026 at 11:59 PM Central: a sale code takes 40% off sitewide, and the Box Builder takes 50% off any five compounds. Midwest states that the sale code cannot be used on a Box Builder order, and its checkout takes one code per order, so an order uses either the sale code or Prof. Peptide's code, not both. Source: Midwest Peptide's emails of October 12 and 16, 2026, and its own site, read October 16, 2026.
Midwest Peptide catalog & prices
Struck-through prices are Midwest Peptide’s list price; the bold figure is your price once you apply your discount code at checkout. Prices current as of October 16, 2026.
Prof. Peptide checked Trustpilot and Finnrick on 30 September 2026. Trustpilot: 4.9 from 312 reviews (read 30 September 2026).
Prof. Peptide matched Midwest Peptide's certificates of analysis against the laboratories' own records at Freedom Diagnostics and Precision Mass Spec.
Prof. Peptide Verification
Verified · 18 October 2026
We identified the lab, matched the certificates on its own website, and read every test result.
Lab identified
PassedPrecision Mass Spec and Freedom Diagnostics
Certificates verified
Passed3 of 3 matched on each laboratory’s own website.
The three certificates were tested on 15 August, 14 September and 12 October 2026.
DSIP 10mg · lot MPDS002
PassedFreedom Diagnostics · tested 15 August 2026 · certificate Midw2608110259
- Identity (LC-MS) — DSIP
- Purity (HPLC-UV) — 99.01%
- Net Content — 12.30 mg
- Appearance — White Lyophilized Powder
- Passed: Identity — Confirmed
Glutathione 1500mg · lot MPGN003-MW-GLUW-0911
PassedPrecision Mass Spec · tested 14 September 2026 · certificate PMS-9403999864
- Passed: Purity (HPLC) — 99.74% (spec >= 90.0%) · PASS
- Passed: Mass Identification (LC-MS/MS) — Glutathione (spec Conforms to declared compound) · PASS
- Passed: Net Peptide Content — 1627.88 mg (spec >= 90% of 1500 mg) · PASS
- Passed: Water Content (Karl Fischer) — 4.82% (spec <= 10.0%) · PASS
- Passed: Acetate Content (HPLC) — 3.97% (spec < 12.0%) · PASS
- Passed: Heavy Metals (ICP-MS) — Not Detected (spec < 10 ppm) · PASS
- Passed: Bacterial Endotoxins (LAL) — Not Detected (spec < 5 EU/mg) · PASS
- Passed: Sterility (RMM) — Growth Not Detected (spec USP <71>) · PASS
- Passed: Mass Balance — Conforms (spec 95.0 – 105.0%) · PASS
- Appearance — White Lyophilized Powder
Tesamorelin 10mg · lot MPTA008-MW-TESW-1008
PassedPrecision Mass Spec · tested 12 October 2026 · certificate PMS-1557039604
- Passed: Purity (HPLC) — 99.91% (spec >= 90.0%) · PASS
- Passed: Mass Identification (LC-MS/MS) — Tesamorelin (spec Conforms to declared compound) · PASS
- Passed: Net Compound Content — 10.47 mg (spec >= 90% of 10 mg) · PASS
- Passed: Water Content (Karl Fischer) — 4.68% (spec <= 10.0%) · PASS
- Passed: Acetate Content (HPLC) — 4.01% (spec < 12.0%) · PASS
- Passed: Heavy Metals (ICP-MS) — Not Detected (spec < 10 ppm) · PASS
- Passed: Bacterial Endotoxins (LAL) — Not Detected (spec < 5 EU/mg) · PASS
- Passed: Sterility (RMM) — Growth Not Detected (spec USP <71>) · PASS
- Passed: Mass Balance — Conforms (spec 95.0 – 105.0%) · PASS
- Appearance — White Lyophilized Powder
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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.