Precision-Synthesized Peptides,
Built for Serious Research

Every batch is synthesized in-house and verified by HPLC and mass spectrometry โ€” so your research starts with a known, documented compound, not a guess.

Precision-Synthesized Peptides, Built for Serious Research

Every batch is synthesized in-house and verified by HPLC and mass spectrometry โ€” so your research starts with a known, documented compound, not a guess.

>99% Purity on every SKU

HPLC + MS Verified, batch-tested

COA Included with every order

Cold-Chain Shipping, ships same business day

Manufactured for Accuracy. Verified for Confidence.

First Class Science specializes in the manufacture of high-purity peptides, proteins, and amino acid derivatives exclusively for research and laboratory use. By combining advanced automated technology with expert manual synthesis, and leveraging both solid-phase and solution-phase methodologies, we consistently produce compounds with purity levels exceeding 99%.

Quality is built into every stage of our process. Each batch undergoes comprehensive, multi-step quality control from synthesis through final packaging and is independently analyzed using High-Performance Liquid Chromatography (HPLC) and Mass Spectrometry (MS). These analytical methods verify molecular identity, sequence integrity, and purity, ensuring every product meets our rigorous standards before it leaves our facility.

Research Use Only Peptides

  • Capsules
  • Cognitive
  • Fat Loss
  • Healing
  • Immunity
  • Longevity
  • Metabolism
  • Peptides
  • Serum
  • Sexual Health
  • Strength
  • Vials
Showing 1โ€“82 of 82 results

Bac Water

Price range: $12.50 through $30.00

GLP-R

Price range: $125.00 through $700.00

GLP-R x 4 Single Dose Vials

Price range: $450.00 through $750.00

GLP-S

Price range: $75.00 through $325.00

GLP-T

Price range: $100.00 through $650.00

Glutathione

Price range: $75.00 through $125.00

Reta (GLP-3) x 4 Single Dose Vials

Price range: $300.00 through $775.00

Tesamorelin

Price range: $225.00 through $320.00

Reta (GLP-3)

Price range: $125.00 through $700.00
  • Capsules
  • Cognitive
  • Fat Loss
  • Healing
  • Immunity
  • Longevity
  • Metabolism
  • Peptides
  • Serum
  • Sexual Health
  • Strength
  • Vials
Showing 1โ€“82 of 82 results

Bac Water

Price range: $12.50 through $30.00

GLP-R

Price range: $125.00 through $700.00

GLP-R x 4 Single Dose Vials

Price range: $450.00 through $750.00

GLP-S

Price range: $75.00 through $325.00

GLP-T

Price range: $100.00 through $650.00

Glutathione

Price range: $75.00 through $125.00

Reta (GLP-3) x 4 Single Dose Vials

Price range: $300.00 through $775.00

Tesamorelin

Price range: $225.00 through $320.00

Reta (GLP-3)

Price range: $125.00 through $700.00

Why First Class Science – Why Researchers Choose Us

Verified Purity

Every SKU ships with a batch-specific Certificate of Analysis.

In-House Synthesis

We control the process end-to-end, not a relabeled import.

Cold-Chain Logistics

Packed and shipped to protect compound stability in transit.

Responsive Support

Real answers from a team that knows the chemistry.

Get New First Class Science Alerts

New peptides, blends, and batch COAs โ€” straight to your inbox.

All products sold on this website are intended strictly for research and laboratory use. They are not drugs, foods, dietary supplements, or cosmetics, and are not intended to diagnose, treat, cure, or prevent any disease. These products are not for human or veterinary consumption, and any use outside of qualified laboratory research is strictly prohibited.

Statements on this website have not been evaluated by the U.S. Food and Drug Administration. By purchasing, the buyer confirms they are a qualified professional or research entity and assumes full responsibility for lawful, compliant handling and use of any product ordered.