Hartford Supply

A quiet check before you enter.

Hartford Supply provides research-grade compounds to qualified researchers and laboratories for in vitro use only. Please confirm before continuing.

Not a researcher? Exit

Manufactured in California · cGMP Certified

Peptides are only
as good as
where they come from.

Peptides are short-chain amino acids that function as targeted biological signals in the body. Their purity, consistency, and integrity depend entirely on how and where they are synthesized. Hartford Supply sources exclusively from a single California cGMP-certified facility. Every compound is independently HPLC verified, batch-documented, and shipped from the United States.

cGMP · Verified
LOT · A-2604-18

Certificate of Analysis.

Every batch independently HPLC verified before release.

Purity (HPLC)≥ 99%
Identity (MS)Confirmed
Endotoxin< 0.5 EU/mg
FacilityCalifornia, USA
68
Compounds
99%
Purity
cGMP Certified Facility
COA With Every Batch
U.S. Manufactured
Third-Party Verified
Domestic Shipping Only
The Collection

Premium peptides, made with pride.

68 compounds in catalog
Updated weekly · Made in the USA
About Peptides

How peptides actually work.

Peptides are short chains of amino acids — between two and roughly fifty, linked in precise sequences. The body already uses them everywhere: as hormones, neurotransmitters, growth factors, and immune messengers. Each one is a specific instruction, read by specific receptors, that triggers a specific response.

Because peptides are built from the same materials the body already recognizes, they tend to be remarkably selective. A signaling peptide can tell one kind of cell to do one thing — repair tissue, release a hormone, modulate inflammation — without scattering effects across unrelated systems.

In a research setting, synthetic analogues let scientists study those signals with reproducible dosing in controlled environments. The result is a growing body of work across four broad areas of biology.

Metabolism
Insulin response, adipose tissue, appetite regulation.
18 compounds
Recovery
Tissue repair, angiogenesis, and healing pathways.
14 compounds
Cognition
Neuroprotective and neuromodulatory signals.
12 compounds
Longevity
Cellular aging, senolysis, mitochondrial work.
16 compounds
The Hartford Standard
One California cGMP-certified facility. One documented standard. Every compound HPLC verified before it ships — the same care, every batch.
FacilityCalifornia, USA
CertificationcGMP Certified
Supply chainDirect — no brokers
Purity≥ 99% HPLC, independent

Synthesized, lyophilized, tested, and shipped entirely within the United States. Batch-documented from production through delivery.

The Full Catalog

Every compound, one standard.

Why Hartford

Quietly held to a higher standard.

What separates Hartford from the rest of the market — in six unfussy commitments.

01

Single-Source Manufacturing

Every compound in the catalog is produced at one California cGMP-certified facility under one documented protocol. No brokers, no secondary suppliers, no variation between batches.

02

Documented at Every Step

Full batch traceability from synthesis through lyophilization and shipment. Certificate of Analysis with every order. Independent HPLC verification.

03

Entirely Domestic

Synthesized, tested, lyophilized, and shipped within the United States. Our California facility operates under FDA framework manufacturing standards.

04

Lyophilized to Specification

Controlled freeze-drying is what gives a compound stability and shelf life. Every vial is lyophilized to a defined moisture spec — no shortcuts.

05

A Catalog, Not a Megastore

68 compounds spanning metabolism, repair, cognition, and longevity. Consciously small — every item is one we'd stand behind ourselves.

06

People Behind the Email

Questions about a compound, a batch, a dose? Email us directly. We know our catalog and we answer ourselves — usually within the day.

Ready to start

Browse the collection, or ask us anything.

We're a small team that knows every compound on the page. If you'd like a guided walk-through, or pricing for bulk research orders, send a note — we reply in person.

COA on every order
Independent HPLC verification
Discreet U.S. shipping
Tracked, cold-pack where required
California cGMP facility
Single-source, no brokers
FDA Disclaimer · Research Use Only

Statements made regarding Hartford Supply products have not been evaluated by the U.S. Food and Drug Administration. Products sold are for in vitro research and laboratory use only — not intended to diagnose, treat, cure, or prevent any disease, and not for human or veterinary use. Information on this site is not medical advice. This notice is required under the Federal Food, Drug, and Cosmetic Act. Read the full disclaimer →