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Research use only. Not for human or animal consumption. Free US shipping over $200.

Rensa

Research use only · United States

Every vial has a lot number.Every lot number has a certificate.

Research peptides synthesized to a 99% purity floor, tested by an independent laboratory, and shipped from US stock. You can read the certificate before you register — that's the whole point.

Purity floor
99.0% HPLC
Certificates online
35 lots
Free shipping
Over $200

Certificate lookup

Printed on every vial label. No account needed. Try .

Independent certificate on every lot

A sample from each fill run goes to a third-party lab. The certificate is published before the lot is listed — search any lot number without an account.

99% purity, or it doesn't ship

Under-spec material is rejected, not moved to a discount tier. There is no second-quality listing on this site.

US stock, same-day dispatch

Everything ships from US inventory. Orders confirmed before 2 pm CT on a business day leave the same day, insulated and gel-packed.

Catalog

36 compounds across 7 research areas

Specifications, pricing and ordering are open to registered researchers. Registration is free, takes a minute, and access is immediate — there is no approval queue and no minimum order.

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  • Metabolic (7)

    Semaglutide · Tirzepatide · Retatrutide · Cagrilintide · Survodutide · AOD-9604 · MOTS-c

  • Repair & recovery (6)

    BPC-157 · TB-500 · BPC-157 / TB-500 · KPV · Thymosin Alpha-1 · LL-37

  • Growth hormone (9)

    CJC-1295 (no DAC) / Ipamorelin · CJC-1295 (no DAC) · Ipamorelin · Tesamorelin · Sermorelin · Hexarelin · GHRP-2 · GHRP-6 · HGH Fragment 176-191

  • Skin & cosmetic (4)

    GHK-Cu · PT-141 · Melanotan II · SNAP-8

  • Longevity (4)

    Epithalon · NAD+ · SS-31 · Glutathione

  • Cognitive (3)

    Semax · Selank · Dihexa

  • Lab supplies (3)

    Bacteriostatic Water · Sterile Water · Acetic Acid 0.1%

Process

What happens between synthesis and your bench

  1. Step 1

    Synthesis

    Solid-phase synthesis at a GMP-audited facility, then RP-HPLC purification to a 99% floor. Anything under is rejected, not discounted.

  2. Step 2

    Fill and lyophilization

    Freeze-dried and filled into nitrogen-flushed borosilicate vials. Each fill run receives exactly one lot number.

  3. Step 3

    Independent testing

    A sample from every lot goes to Janoshik Analytical for HPLC purity, mass-spec identity, endotoxin, heavy metals and water content.

  4. Step 4

    Published before sale

    The certificate goes into the public lot lookup before the lot is listed. If a lot isn't searchable here, we aren't selling it.

Cold chain

Vials ship with gel packs in insulated mailers. Orders confirmed by 2 pm CT leave the same business day.

Storage

Sealed vials at -20 °C. Refrigerate after reconstitution and use within 30 days. Compound-specific guidance is on every product page.

If a lot fails you

Send an accredited lab's report. If it falls below our published specification, we refund the order and reimburse your test.

Read the full quality process →

Questions

The ones that actually get asked

All questions →

Every lot is sampled and sent to Janoshik Analytical, an independent analytical laboratory with no commercial interest in the result. The certificate is posted to our lot lookup before the lot goes on sale, so you can read the full panel — HPLC purity, mass-spec identity, endotoxin, heavy metals and water content — without an account and before you spend anything. If a lot number doesn't resolve on this site, we are not selling it.

Wholesale

Lab, institution and reseller accounts

Quoted tiers beyond the standard volume discounts, net-30 terms for institutions, reserved lots, and the complete certificate set attached to every invoice. We reply within one business day.

Check a certificate before you trust a supplier

Take any lot number from any vial you already own — ours or anyone else's — and see how much of it you can actually verify. That comparison is the reason this site exists.