Meridian Peptides
UK-based supplier with transparent sourcing but inconsistent COA detail and limited affiliate disclosure.
Transparency Score
- Transparency3.6 / 5
- COA Quality3.9 / 5
- Lab Testing3.7 / 5
- Shipping Clarity3.9 / 5
- Support Clarity3.8 / 5
- Affiliate Disclosure3.5 / 5
Strengths
- Clear manufacturing origin disclosure; publicly identifies UK-based synthesis facility
- Third-party testing confirmed; lab name and credentials publicly visible
- Transparent refund policy with specific timelines and condition requirements
- Email and live chat support available; average response time 2-4 hours
Concerns
- COA documents lack batch manufacturing dates; only expiry dates provided
- Affiliate program mentioned but commission rates not publicly disclosed
- No published information on testing methodology or specific analytical parameters
- Limited detail on shipping temperature control or handling procedures
Editorial review
Meridian Peptides operates from a registered facility in the UK and deserves credit for transparent sourcing disclosure. Their website clearly states their manufacturing location and provides a facility overview document. However, their commitment to transparency becomes uneven when examining certificate of analysis documentation. While COAs are provided for every product, they consistently omit manufacturing dates—showing only expiration dates. This makes it difficult for research customers to assess storage time and potential degradation.
Testing is conducted with an external UK-based laboratory. The lab name and accreditation status are publicly disclosed, which is positive. However, detailed testing methodology is sparse. The COAs show purity percentage and identity confirmation but lack specifics about HPLC conditions, detection wavelengths, or acceptance criteria. This creates a transparency gap between providing test results and enabling customers to evaluate the rigor of those tests.
The refund policy is one of the clearest we reviewed. Unopened orders receive refunds within 7 business days of return; opened orders are handled on a case-by-case basis with specific criteria listed. This is commendable. Customer support via email and live chat is responsive during business hours (9 AM–6 PM GMT), though support staff sometimes provided vague answers about analytical parameters.
Shipping practices lack published detail. While they mention using 'secure packaging,' there is no information about temperature monitoring, packaging materials, or handling protocols. The affiliate program exists but is poorly documented—commission rates are available only to registered affiliates and not publicly disclosed, which falls short of full transparency.