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Product Sourcing, Testing, and Quality Standards

Written by LicensedPeptides Support

We maintain a rigorously tested and diversified supply chain across the United States. Our FDA Regulated Facilities are held to strict quality protocols and contractual obligations. Any product that fails to meet our standards is rejected, and the supplier is required to issue a refund.


Raw Materials

Our raw material suppliers operate in FDA-registered, inspected, and audited facilities located in the United States. These facilities are manufactured under strict current Good Manufacturing Practices (cGMP).


Analytical Testing

We exclusively partner with FDA-audited and ISO-certified analytical laboratories based in the United States.

Lab Partner

Janoshik Analytical

Testing Overview

The industry norm typically includes just two tests: purity and quantity via High Performance Liquid Chromatography (HPLC). Some providers may substitute Mass Spectrometry, which provides similar results using different analytical techniques.

We exceed these standards by conducting five distinct tests, applied twice—first when raw materials arrive, and again after final product completion:

  1. Purity: Confirms how pure the sample is in comparison to a certified reference.

  2. Quantity: Measures how much peptide is present in the sample.

  3. Sterility: Validates the complete absence of viable bacteria or fungi.

  4. Endotoxins: Screens for fever-causing bacterial toxins in sterile products.

  5. Heavy Metals: Checks for trace levels of toxic metals such as lead or mercury.

Product Purity

  • Finished Products: Verified to exceed 99% purity by HPLC.

  • Raw Materials: Verified to exceed 99.5% purity by HPLC.

Aseptic filtration (sterile processing) may slightly reduce purity levels due to mechanical handling.


Endotoxins

Endotoxins are toxic substances found in the outer membrane of certain bacteria (Gram-negative). These molecules, known as lipopolysaccharides (LPS), can enter solutions when bacteria grow or die, potentially triggering harmful immune responses.

Because endotoxins are invisible and resistant to heat, products intended for injection are required to meet strict testing standards.

Acceptable Endotoxin Levels

Endotoxin limits vary depending on usage, but we set a strict internal threshold of no more than 20 EU per mL. This aligns with the most stringent levels recommended by USP <85>, EP 2.6.14, JP 4.01, and FDA guidance.


Sterility Testing

Sterility testing is essential to confirm that no microorganisms—bacteria, fungi, or others—are present in the final solution. We follow USP <71> standards to validate sterility in applicable products.


Heavy Metals Testing

Elemental impurities, or heavy metals, are regulated under U.S. standards. We are currently developing a comprehensive pass/fail testing protocol for six key heavy metals:

  • Chromium

  • Arsenic

  • Cadmium

  • Lead

  • Aluminum

  • Mercury

While not all current products include this testing, we are on track to implement full coverage across our portfolio by the end of 2025.


Finished Products

We work with contract manufacturers in the United States for finished product production.

For lyophilized (freeze-dried) peptides, we require aseptic processing, including sterile filtration through 0.22 µm filters in GMP-compliant facilities prior to freeze-drying. Sterility is confirmed through USP <71> testing.

We maintain our high analytical standard—five distinct tests per product—far exceeding industry norms:

  • Purity

  • Quantity

  • Sterility

  • Endotoxins

  • Heavy Metals

Each finished product is batch-coded and labeled with a QR code that links to its Certificate of Analysis and expiration date. Quality and consistency are carefully tracked to ensure reliability.

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