Know exactly
what's in the vial.
High-purity research peptides, independently lab-tested and documented to the milligram. Every lot ships with its own certificate of analysis.
Best sellers
The lots researchers reorder most. Purity and price per milligram shown on every card.
Every lot, third-party assayed.
We don't ask you to take purity on faith. Each batch is independently tested by HPLC and mass spectrometry at an accredited U.S. lab. Enter a lot number to pull its certificate of analysis.
Sample lookup. Any lot you enter returns a demonstration COA.
The standard behind every vial
You shouldn't have to guess what's in the vial or do bundle math to find the real cost. What you order is what arrives, documented.
Verified purity
Every batch is assayed by an accredited third-party lab. The COA travels with the lot, and you can pull it yourself before and after you order.
Priced by the milligram
Cost per milligram is printed on every product, so you can compare value honestly across compounds and sizes instead of decoding bundles.
Ships in 24 hours
In-stock lots leave the same or next business day, cold-packed and tracked. Real people answer questions, seven days a week.
The catalog
Research peptides, blends and supplies. Sample pricing & lot data
What researchers say
Demonstration reviews. Replace with your own verified testimonials before launch.
"Ordered four times now. Every lot matched its COA, and the purity numbers held up when I ran my own checks. That's rare."
"Cost per milligram printed right on the page made budgeting trivial. No bundle math, no surprises at checkout."
"I had a question about a lot and an actual person answered the same day. Shipped cold, arrived in two."
Supplied for research use only
Meridian Peptides products are sold strictly for laboratory and research purposes. They are intended for qualified researchers conducting in-vitro, analytical, or pre-clinical work.
Not for human or veterinary use, and not for consumption of any kind.