PEPTIDE CORPUS
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US domestic vendor

Peptide Source

GMP-compliant US vendor ranked #3 with HPLC/MS COAs and custom synthesis options.

Last updated

Scored 7.2 7.2 of 10 overall, across 8 dimensions how scores are derived

Score breakdown

Dimension scores are editorial, carried from the operator's earlier directory — they are not user reviews. Each label links to what the dimension measures.

About Peptide Source

Peptide Source is a US-based research peptide vendor with GMP-compliant manufacturing and comprehensive COAs featuring HPLC and mass spectrometry analysis. Ranked as the third-best research peptide company in the United States, the company serves academic and pharmaceutical research settings with a broad catalog and custom synthesis options. All peptides are manufactured under strict quality controls with independent testing for purity and potency.

Written for the operator's previous directory and reproduced unchanged (markup and emoji stripped); the rest of this site does not share its voice. Ported observed .

From the storefront

No public product feed on file. The storefront exposes no product API we can read without an account, so nothing is shown rather than something guessed.

Catalogue, as their API returns it

Their storefront has no public API we can read, so nothing is shown rather than something guessed. observed

Strengths and weaknesses

Where it does well

  • GMP-compliant manufacturing
  • HPLC and mass spectrometry COAs
  • Custom synthesis options available
  • Ranked #3 US research peptide company
  • Fast US shipping

Where it falls short

  • Credit card only payment
  • Limited independent reviews compared to top vendors

Carried verbatim from the source directory's editorial review, observed .

Shipping

Destinations
  • United States
Countries Served
United States observed
Domestic Shipping
Varies observed
Estimated Delivery
Domestic: 2-5 business days observed
Free shipping
No
Reship guarantee
Not on file
Refund policy
Not on file

Payments

  • credit-card

Coupons

No current code on file. Codes are published only with the code, the discount, a source and the date we saw it, and expired codes are removed at build — the coupon policy. 0 are on file site-wide today.

Certificates of analysis

Third-party tested
Yes
Publicly accessible
Yes
Test types
  • HPLC
  • Mass Spectrometry
Source's COA tier
third-party

GMP-compliant manufacturing with HPLC and mass spectrometry COAs for every batch. observed

A COA describes one batch's purity. It is a document about a vial, not evidence about an effect, and it never grades a claim on this site — the grading rubric names what qualifies.

Peptides listed 5

Linked names have a record here; the others we hold nothing on yet. A vendor listing a compound says nothing about the evidence for it.

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