Osirion Peptides Frequently Asked Questions (FAQ)

Q1: What does “≥99% purity” mean?

Our peptides are sourced from trusted manufacturers who specify a purity of ≥99% based on validated laboratory methods such as HPLC or Mass Spectrometry. This means at least 99% of the material is the intended peptide with minimal impurities.

Q2: Why does the label state 99% purity if test results may show something different?

The ≥99% purity stated on the label comes directly from the manufacturer’s validated in-house testing. To provide transparency, we also commission independent testing through Janoshik, who report results with an industry-standard ±5% margin of error. This means a Janoshik result of, for example, 95% ±5%, is still consistent with the supplier’s ≥99% specification, since the true value may fall anywhere up to 100%. Both results are accurate, they are simply measured with different methods and margins.

Q3: Why do independent test results sometimes show different numbers?

Janoshik applies an industry-standard ±5% margin of error, so slight variation is expected between their results and the manufacturer’s specification. For example, a reported 95% purity may still reflect up to 99% purity within this margin. This difference reflects normal laboratory variability, not a lower-quality product.

Q4: Are the COAs shown on your website from Osirion?

No. All Certificates of Analysis (COAs) are provided directly by Janoshik, an independent testing lab. We do not perform in-house testing but share Janoshik’s results transparently for client reference.

Q5: Why do you show both supplier specifications and Janoshik results?

Supplier data gives the baseline purity specification (≥99%), while Janoshik’s independent verification ensures these specifications are accurate. By showing both, we provide full transparency and give researchers confidence in the quality of the material.

Q6: What is the gold-standard tolerance for lab-tested peptide amounts?

Under gold-standard analytical methods such as LC-MS and HPLC, a small variation of about ±2 % to ±3 % from the labeled amount is considered scientifically acceptable. This range reflects normal analytical precision and environmental factors such as humidity or weighing sensitivity.

According to international guidelines such as ICH Q2(R2) (Validation of Analytical Procedures) and ICH Q6A (Specifications: Test Procedures and Acceptance Criteria), validated assays are expected to operate accurately within a defined range, and minor deviations within a few percent fall well inside standard analytical tolerance.

In short: a result that differs slightly—whether higher or lower—is normal, expected, and confirms the product was tested under recognized gold-standard laboratory conditions.

Q7: Why do some lab reports not show purity results?

According to Janoshik Analytical, purity testing applies only to single, well-defined peptides. Non-peptide compounds or blended formulations (containing multiple peptides) cannot be measured using peptide-specific LC-MS or HPLC methods. In such cases, identity is confirmed instead of purity, which is a normal and accepted analytical limitation.

Q8: What does “research use only” mean for Osirion peptides?

All peptides sold under the Osirion brand are supplied strictly for research use only. This means they are intended for laboratory experiments, scientific studies, or educational purposes. They are not manufactured or marketed for human consumption, therapeutic use, or veterinary applications.

Q9: How should Osirion peptides be used?

Osirion peptides are supplied exclusively for laboratory research and educational purposes. They may be used for applications such as in-vitro testing, assay development, or scientific study. Any use outside of these settings, including human self-experimentation, is considered misuse and is not endorsed or supported by Osirion.

Q10: How should I interpret the COA margin of error?

A margin of error represents a range where the true purity lies. For example, if a test shows 95% ±5%, the actual purity is likely between 90% and 100%. This is a standard part of scientific analysis and is widely accepted across the research industry.

Q11: Why choose Osirion Peptides?

Because we combine trusted sourcing from certified manufacturers with independent third-party testing by Janoshik Analytical, ensuring authenticity, consistency, and transparency. Every batch is verified for identity, purity (where applicable), and composition accuracy, following gold-standard LC-MS and HPLC testing methods.