Are RHL peptides third-party tested?

Yes. Every production lot is independently assayed by accredited laboratories using HPLC for purity and mass spectrometry for identity. The batch-specific Certificate of Analysis is included with your order.

What purity can I expect?

All RHL research peptides are guaranteed ≥99% purity, confirmed by HPLC on every batch and documented on the accompanying COA.

How fast does RHL ship?

In-stock orders placed before 2pm ET ship the same business day — cold-chain and tracked from our US-based facility. Free shipping applies to orders over $150.

What does "for research use only" mean?

Our products are intended exclusively for in-vitro and laboratory research by qualified professionals. They are not drugs, supplements, or food, and are not for human or veterinary use.

Do you offer bulk or institutional pricing?

Yes. Research kits and volume tiers are available, and academic or institutional accounts qualify for additional pricing. Contact our team for a quote.

Third-party tested · 99+% purity · Free shipping over $150

Clinical-grade · third-party tested

Research peptides you can actually trust.

Every vial is independently verified for ≥99% purity by HPLC and mass spectrometry — with a batch-specific COA in every order and same-day US shipping.

Shop peptides →See our process

Verification

HPLC + MS

Documentation

Batch COA

Shipping

Same-day US

Compliance

RUO · GMP

Purity

≥99.8%

Live COA · Lot 772

In-stock SKUs

24+ peptides

Why researchers choose RHL

Quality you can verify,
not just claims.

Every batch is independently assayed by HPLC and mass spectrometry. You get the paperwork before you get the vial — no exceptions.

Shop peptides →Browse COA library

99%+

HPLC purity

Guaranteed on every lot, documented per vial.

100%

Batch COA

Certificate of Analysis ships with every order.

3rd-party

Independent labs

External HPLC + mass spec before release.

24h

US ship-out

Insulated packaging, tracked delivery.

HPLC verified Mass spectrometry Endotoxin screened Lot-traceable US-based shipping

Top research compounds

Best Selling Peptides

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Live from the bench

Lead Analyst · RHL Quality

Every COA is signed by the analyst who ran it.

HPLC

Per batch

≥99%

Verified purity

Inside the lab

Built by scientists,
for scientists.

Every vial passes through trained hands and accredited instruments before it leaves our facility. Our team holds your research to the same standard they'd hold their own.

PhD-led

Quality team

ISO methods

Assay workflow

Signed COAs

Per analyst