How to Get a Peptide Independently Tested

A vendor's COA tells you what the vendor says. An independent test tells you what is actually in the vial you received. It is the single most useful thing a member can contribute to the Quality section.

1. Pick a lab

Look for an analytical lab that:

• Publishes its methods and prices
• Accepts samples from individuals
• Reports identity (mass spectrometry) as well as purity (HPLC)
• Has a track record other members can point to

Search Quality first. Members often share which labs they have used and how long results took.

2. Choose the tests

• Identity (MS): confirms it is the right molecule. Always order this.
• Purity (HPLC): how much of the sample is the target peptide.
• Quantity: how many milligrams are in the vial, which shows whether the fill matches the label.
• Endotoxin or sterility: more specialized and more expensive, but useful for some research uses.

3. Send the sample

• Send a sealed, unopened vial when you can, so nobody can question handling.
• Record the vendor, product name, lot number and purchase date before you ship.
• Follow the lab's packaging instructions, including any cold-shipping requirements.

4. Share the results

Post in Quality with:

• Vendor, compound and lot number
• The lab's name and the tests run
• The full report, not a cropped number. Photos are checked automatically for personal details before they go up.

One result is a data point. Several results from the same vendor over time show whether quality is consistent.

For research use only. Nothing here is medical advice.