Precision. Purity. Accountability.
Research-grade peptides with third-party testing, endotoxin screening, and lot-tracked documentation.
Precision. Purity. Accountability.
Research-grade peptides with third-party testing, endotoxin screening, and lot-tracked documentation.
Third-party Tested
Every batch undergoes independent HPLC and mass spectrometry testing to verify purity and chemical identity.
Endotoxin Tested
We screen for bacterial endotoxins that many suppliers overlook - helping ensure contaminants don't compromise your results.
Lot-Tracked
Each batch is assigned a unique lot number with open-access COAs, so you can verify exactly what you're working with.
USA Fulfillment
All synthesis and fulfillment happens in the US - faster turnaround, tighter quality control.
What Are Research Peptides?
Peptides are short chains of amino acids used in laboratory research to study biological signaling, cellular pathways, and metabolic processes. At ELIXR Peptides, each compound is produced using advanced solid-phase synthesis techniques in controlled laboratory environments - ensuring the consistency and precision that in vitro studies demand.
Research Use Only
All products from Elixr Peptides are intended solely for laboratory research purposes and are not for human or animal consumption. These materials are for in vitro research only and must be handled by qualified professionals in controlled lab environments. By purchasing, the buyer agrees to use these products in compliance with all applicable laws and regulations.
Batch Produced,
Batch Tested
COAs available for each batch.
Precision you can verify.
Research-grade peptides with documented purity and third-party verification.
A proper COA shows the testing method, purity percentage, batch number, date of testing, and supporting chromatogram or mass spectrum data. At ELIXR, we provide open-access COAs so researchers can verify every detail before running their experiments.
Verified COA
Documentation
At ELIXR Peptides purity alone isn’t enough.
Our compounds undergo endotoxin screening to detect bacterial contaminants that traditional testing can overlook helping ensure researchers receive materials held to a higher standard of quality and consistency, a critical quality control test that many other suppliers overlook.
Third-Party Analytical Testing
Third-Party Analytical Testing
Every batch undergoes independent third party testing, including HPLC and mass spectrometry, to verify purity, identity, and overall chemical integrity.
A rigorous endotoxin screening is performed-searching for the presence of microscopic contaminants that can interfere with research results and compromise experimental reliability.
HPLC checks purity. MS or LC-MS confirms identity. Endotoxin screening checks for bacterial contaminants. Three different tests, one complete picture.
Frequently
Asked Questions
What are your products intended for?
All ELIXR Peptides products are supplied strictly for research use only. They are not intended for human consumption, therapeutic, or diagnostic purposes.
Are your peptides tested for purity?
Yes. Every batch undergoes independent third-party analytical testing, including HPLC and mass spectrometry, to verify purity and chemical identity.
What’s the difference between HPLC purity and endotoxin levels?
HPLC (High-Performance Liquid Chromatography) measures the purity of a peptide sample – what percentage of the detected material is the target peptide versus impurities or byproducts. A 98%+ HPLC result means the peptide content is highly concentrated.
Endotoxin screening (typically LAL testing) measures bacterial endotoxin contamination – a completely different parameter. Endotoxins are bacterial cell wall fragments that can be present even in a highly pure peptide. Results are reported in EU/mL or EU/mg (Endotoxin Units), where lower numbers indicate lower contamination.
Why both matter:
- HPLC purity tells you what’s in the vial
- Endotoxin screening tells you what else might be in the vial
- A peptide can pass HPLC at 99% purity and still have elevated endotoxins – or vice versa
Many suppliers only test one. At ELIXR Peptides, every batch undergoes both HPLC and endotoxin screening to give researchers a complete quality picture.
How can I verify a product’s Certificate of Analysis (COA)?
Each product includes lot-specific documentation. You can view and verify testing reports through our COA documentation page, where certificates are organized by product and lot number.
Why does my vial look almost empty?
Research peptides are supplied in lyophilized (freeze-dried) form to improve stability during storage and shipping. The freeze-drying process removes moisture, which means the peptide may appear as a small white puck, fluffy powder, thin film, or light residue at the bottom of the vial — even when filled correctly.
This is normal and not an indication of underfill. The label weight (e.g., 5 mg, 10 mg, 30 mg) refers to the mass of the peptide itself, not the physical volume of powder. Some peptides are inherently lightweight and fluffy, so a visually small amount can still be precisely the correct dose.
For laboratory research, lyophilized peptides are reconstituted by adding an appropriate solvent per the researcher’s protocol. Vials should be brought to room temperature while sealed before reconstitution to prevent condensation inside the vial.
Key takeaway: A “nearly empty” vial is expected. The weight is verified – the volume isn’t.
How should I store my peptides when they arrive?
Lyophilized (unopened) peptides:
- Store in a freezer or refrigerator in a dry, sealed environment
- Protect from moisture, direct light, and heat
- Avoid repeated temperature cycling
Reconstituted peptides:
- Generally less stable than lyophilized form
- Label the vial with concentration, date of reconstitution, lot number, and storage conditions
- Protect from light and avoid repeated freeze-thaw cycles
- Follow the specific storage guidance on the product’s COA or SDS
Proper storage preserves peptide integrity and ensures research consistency. At ELIXR Peptides, all products are shipped in lyophilized form to maximize stability during transit – but proper storage upon arrival is equally critical.
Do you provide support if I have questions about documentation or orders?
Yes. If you require assistance regarding orders, testing documentation, or product information, our support team is available to help.