Prof. PeptideProf. Peptide

20 Aminos Coupon Code: PROFPEPTIDE — Save 15%

The current 20 Aminos discount code is PROFPEPTIDE, for 15% off your order. Prof. Peptide verifies this code directly with the vendor and updates it when it changes.

20 Aminos is a research peptide supplier based in Atlanta, Georgia, publishing ILS Laboratories and Freedom Diagnostics certificates for its lots.

Discount Code

✓ Lab & COAs Verified
Shop 20 Aminos (opens in new tab)

Key facts

Catalog
Lyophilized research peptides in vials, with certificates of analysis per lot
Third-party testing
ILS Laboratories & Freedom Diagnostics
Certificates of analysis
Public certificate archive on the vendor's own domain: ILS Laboratories and Freedom Diagnostics certificates per lot
Prof. Peptide’s discount
15% off with code PROFPEPTIDE
Code checked
Prof. Peptide confirmed this rate in its partner dashboard on October 30, 2026.
20 Aminos logo

Overview

20 Aminos sells research peptides as lyophilized powder in vials, with a certificate of analysis on file for each lot. Its certificate archive can be searched by batch, SKU, certificate number or date, and its certificates come from two laboratories, ILS Laboratories and Freedom Diagnostics.

20 Aminos catalog & prices

The compounds its certificate archive covers are grouped below by Prof. Peptide's research-library categories.

Metabolic & GLP-1
Retatrutide (S20-3R), AOD-9604
Skin Health & Anti-Aging
SNAP-8
Gut Health & Immunity
KPV
Sleep & Recovery
DSIP
Longevity
NAD+, Glutathione, SS-31
Sexual Health
PT-141

20 Aminos sells retatrutide as S20-3R; its own ILS Laboratories certificate names the compound. Code PROFPEPTIDE gives 15% off, as Prof. Peptide's 20 Aminos affiliate dashboard records it.

Testing: Labs & Certificates of Analysis

20 Aminos' certificate archive lists 24 lots: 15 certificates from ILS Laboratories, issued to S20 Research, LLC with www.20aminos.com printed under the name, reporting HPLC purity, net peptide content, identity, heavy metals and a fentanyl screen; and 9 from Freedom Diagnostics, issued to 20 Aminos, reporting purity, net content and mass identification.

Prof. Peptide randomly selected certificates from the archive and matched them at each issuing laboratory. At ILS Laboratories, Mark of Prof. Peptide looked up AOD-9604 10mg (lot B10043) and S20-3R 10mg (lot B10022) on the laboratory's own verification page on November 2, 2026, and each matched; a third selected certificate, for B12, also matched but is not shown, because B12 is not a peptide. At Freedom Diagnostics, four selected certificates were identical to the laboratory's own files. Each panel certificate's results are below.

Prof. Peptide Verification

Verified · November 2, 2026

Prof. Peptide identified the lab, matched the certificates on its own website, and read every test result.

Lab identified

Passed

ILS Laboratories

Certificates verified

Passed

2 of 2 matched on ILS Laboratories’ own website. ILS Laboratories’ records name the client as S20 Research, LLC, the company 20 Aminos’ site says powers it (“Powered by S20 Research, LLC”), with www.20aminos.com printed under the name on each certificate, so Prof. Peptide counts the certificates as 20 Aminos’.

Both certificates were tested on June 25 and July 2, 2026.

AOD-9604 10mg · lot B10043

Passed

ILS Laboratories · tested July 2, 2026 · certificate COA-2026-953618 · client named S20 Research, LLC · Sold in 20 Aminos’ store as AOD-9604.

  • Passed: Peptide Purity (HPLC) — 99.90% (spec >= 95.0%) · PASS
  • Passed: Net Peptide Content — 10.73 mg (at least 90% of the labeled 10 mg)
  • Passed: Identity (HPLC-RTM) — Confirmed (spec AOD) · PASS
  • Passed: Fentanyl Screen — Not Detected (spec Immunoassay, 50 ng/mL cutoff) · PASS

S20-3R 10mg · lot B10022

Passed

ILS Laboratories · tested June 25, 2026 · certificate COA-2026-953621 · client named S20 Research, LLC · Sold in 20 Aminos’ store as S20-3R; the certificate’s identity line names retatrutide.

  • Passed: Peptide Purity (HPLC) — 99.81% (spec >= 95.0%) · PASS
  • Passed: Net Peptide Content — 10.36 mg (at least 90% of the labeled 10 mg)
  • Passed: Identity (HPLC-RTM) — Confirmed (spec Retatrutide) · PASS
  • Passed: Fentanyl Screen — Not Detected (spec Immunoassay, 50 ng/mL cutoff) · PASS

20 Aminos is listed on Prof. Peptide's All Vendors page.

All products are sold for laboratory research use only.

Payment and shipping

Orders placed before 5:00 PM Eastern on business days are typically shipped the same day; later orders ship the next business day. 20 Aminos ships by UPS, FedEx and USPS, with UPS or FedEx Express 2-Day and Next Day Delivery options at checkout, and emails a tracking number once an order ships.

Customer service

Customer service is by email at support@20aminos.com, Monday to Friday, 9 AM to 5 PM Eastern. 20 Aminos is based in Atlanta, Georgia.

A quality issue, damage or an incorrect item is reported within 48 hours of delivery, with photographs; approved claims receive a replacement or a refund. Opened or unsealed items and change-of-mind requests are not eligible for return.

Ratings & reviews

Bought from 20 Aminos? Tell Prof. Peptide how it went.

Frequently Asked Questions

Is 20 Aminos legit?
20 Aminos publishes a certificate for each lot in its archive, from ILS Laboratories and Freedom Diagnostics. Prof. Peptide randomly selected certificates from both laboratories and matched them at each laboratory’s own records: AOD-9604 10mg and S20-3R 10mg at ILS Laboratories, looked up by Mark of Prof. Peptide on November 2, 2026, and four Freedom Diagnostics certificates, each identical to the laboratory’s own file.
What is the current 20 Aminos coupon code?
The current 20 Aminos discount code is PROFPEPTIDE, for 15% off your order.
Is the 20 Aminos code still working?
20 Aminos gives Prof. Peptide’s readers 15% off with code PROFPEPTIDE, as Prof. Peptide’s 20 Aminos affiliate dashboard records it; Prof. Peptide has not tested the code at checkout. PROFPEPTIDE is the 20 Aminos promo code, coupon code and discount code; they are three names for the same string.
Does Prof. Peptide earn a commission on this code?
Yes. Prof. Peptide is a 20 Aminos affiliate and earns a commission on orders placed through its link or with its code.
Does 20 Aminos have an affiliate program?
Yes. 20 Aminos runs an affiliate program, and Prof. Peptide is a member of it. Headline commission: Not published. Discount for referred customers: Not published. Prof. Peptide’s record as of October 21, 2026.
What is S20-3R at 20 Aminos?
Retatrutide. 20 Aminos’ own ILS Laboratories certificate for S20-3R (COA-2026-953621) confirms its identity as retatrutide.
Which laboratories test 20 Aminos products?
ILS Laboratories and Freedom Diagnostics. The ILS certificates are issued to S20 Research, LLC, the company 20 Aminos’ site says powers it, with www.20aminos.com printed under the name; the Freedom certificates name 20 Aminos.
How does 20 Aminos ship?
Orders placed before 5:00 PM Eastern on business days typically ship the same day, by UPS, FedEx or USPS, with UPS or FedEx 2-day and next-day options at checkout.

Related pages

Checked and updated

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.