CAP CITY
PEPTIDES
Jefferson City's locally owned source for research peptides.
We're a family-owned, veteran-owned business rooted in this community. You'll run into us at the ballgame, the grocery store, and church on Sunday. Our name is on everything we do, and we take that seriously.
All products are sold for research purposes only and are not for human consumption. Must be 21+.

Locally Owned and Operated
Veteran-Owned
Third-Party Tested, Every Batch
Based in Jefferson City, MO
A Local Name You Can Put a Face To
Most peptides sold online come from anonymous resellers. There's no name, no face, and no way to know who's behind the business. We started Cap City Peptides to offer something different: a local, accountable source run by people who live and work in this community.
We own and operate other businesses here in Mid-Missouri. Our reputation in Jefferson City matters to us, and we treat this business the same way we treat every other one we run.
What Are Peptides?
Peptides are short chains of amino acids, the building blocks of proteins. The human body naturally produces many of them. Peptides are the focus of ongoing scientific research worldwide, and new studies are published regularly.
Cap City Peptides provides research-grade peptides. We do not provide medical advice, and nothing on this site should be read as a claim about what any product will do. If you have health questions, please talk to your doctor.
Our Testing Standards
Every batch we receive is independently verified before it's made available. From each kit, one vial goes to a third-party lab for testing.
EACH BATCH MUST MEET ALL OF THE FOLLOWING:
01
Identity
The vial contains what the label says it contains.
02
Purity
A minimum purity of 99%.
03
Contaminants
No detectable heavy metals or contaminants.
Batches that don't meet every standard don't get sold.
Certificates of analysis are available on request.
Meet the Team

Adam Mietzner
CO-OWNER
Adam is a Jefferson City business owner, husband, father, and youth volleyball coach. He and Lydia have built every one of their businesses on showing up for the community they call home. Anyone who reaches out to Cap City Peptides can know exactly who they're dealing with: a neighbor who stands behind his name.

Jerry Dooling
CO-OWNER
Jerry is a veteran, a family man, and one of the most driven people you'll meet. He brings the same work ethic and heart for service to Cap City Peptides that he brought to his military career.

Lydia Mietzner
OPERATIONS
Lydia keeps everything running behind the scenes, from inventory and orders to making sure every customer is taken care of. She and Adam believe a local business should give back to the community that supports it. Lydia makes sure everyone who contacts Cap City Peptides is treated with the same care and respect they'd expect from a friend down the street.
