Research use only · Not for human or animal consumption · Must be 18+ · Not evaluated by the FDA · U.S. fulfillment · Third-party tested · Research use only · Not for human or animal consumption · Must be 18+ · Not evaluated by the FDA · U.S. fulfillment · Third-party tested · 

4th Quarter Labs — peptide innovation and research
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Laboratory bench lined with sealed research vials

US-Synthesized · Batch-Verified

Research compounds,
verified.

4th Quarter Labs supplies high-purity research peptides verified by independent third-party laboratories. Every vial carries its own batch ID.

Shop research peptides →Our standards
≥99%
Verified purity
100%
Lab tested
22
Catalog items
18+
Age verified
01

Third-Party Tested

Independent U.S. laboratories verify identity and purity — not manufacturer data alone.

02

≥99% Purity Standard

Confirmed by HPLC and mass spectrometry through independent testing.

03

Batch Verified

Every batch carries its own ID and is verified before it ships.

04

U.S. Fulfillment

Lyophilized and vacuum-sealed under controlled conditions, shipped domestically.

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Research bundles

You save $20.00

Energy Bundle

NAD+ and MOTS-C research kit supplied with sterile bacteriostatic water. Every vial in the kit is independently batch verified. For laboratory and research use only.

  • ✓NAD+ 500MG1 × lyophilized vial
  • ✓MOTS-C 10MG1 × lyophilized vial
  • ✓BACTERIOSTATIC WATER 10ML1 × 10mL sterile vial
$150.00$170.00
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You save $24.00

Shred Bundle

GLP-3RT and Tesamorelin research kit supplied with sterile bacteriostatic water. Every vial in the kit is independently batch verified. For laboratory and research use only.

  • ✓GLP-3RT 10MG1 × lyophilized vial
  • ✓TESAMORELIN 10MG1 × lyophilized vial
  • ✓BACTERIOSTATIC WATER 10ML1 × 10mL sterile vial
$165.00$189.00
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You save $35.00

Beauty Bundle

NAD+ and GLOW research kit supplied with sterile bacteriostatic water. Every vial in the kit is independently batch verified. For laboratory and research use only.

  • ✓NAD+ 500MG1 × lyophilized vial
  • ✓GLOW 70MG1 × lyophilized vial
  • ✓BACTERIOSTATIC WATER 10ML1 × 10mL sterile vial
$160.00$195.00
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About 4th Quarter Labs

Built for researchers who don't compromise.

Every compound we distribute is verified for identity and purity through independent third-party laboratories. Materials arrive lyophilized, vacuum-sealed and stable — ready for reliable, reproducible in-vitro work.

All products are intended solely for research and laboratory purposes and are not for human or animal consumption, medical treatment, or therapeutic use.

Our standardsCOA library

Peptides

Single-sequence research peptides, lyophilized and batch verified.

Blends

Multi-compound research blends prepared in a single sealed vial.

Cofactors

Cofactors and metabolic research materials at high purity.

Supplies

Sterile bacteriostatic water and consumables for bench work.

Bundles

Curated multi-vial research kits at bundle pricing.