A 5-minute at-home test that shows whether your vial actually contains peptide — not just mannitol filler. No lab, no shipping, no waiting.
Independent testing keeps finding underdosed vials, pure filler, and even salt water sold as expensive peptide. Most buyers never check — because real lab testing costs hundreds and takes weeks.
of online peptides found mislabeled (JAMA)
failed purity in independent 2024 testing
lab tests you'll actually run at $360/vial
Add your reconstituted sample to the reagent tube. The colour does the talking.
No peptide detected — likely filler only. Be suspicious of the vial.
Real peptide content present. The deeper the blue, the more peptide.
No equipment, no training. If you can reconstitute a vial, you can run this.
Add the smallest measured amount of water to your vial to concentrate it.
Drop your sample into the pre-filled reagent tube and cap it.
Give it 2–5 minutes. Hold it against white paper in daylight.
Match to the card: pale = filler, deep blue = peptide present.
Each kit has 2 tests, a colour reference card, and everything you need. Verify a vial in the time it takes to make coffee.
Get PeptideCheck