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A Lyotek Retatrutide 20 mg vial with its copper label, lit from behind on a dark studio surface.

Grade A+research peptides

We have made research peptides in Switzerland since 2022. Our quality management system is registered to ISO 9001, and we hold certificates of compliance for cGMP manufacturing, ISO/IEC 17025 laboratory testing, ISO 14644-1 cleanrooms and GDP distribution. Today Lyotek is the #1 supplier in the field, shipping to more than 170 countries.

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How a Lyotek peptide is made

Every peptide goes through the same five steps in one laboratory, and each step leaves a record that follows the lot.

  1. Synthesis

    Each peptide is built one amino acid at a time by solid-phase synthesis, following the sequence on its specification.

  2. Purification

    Preparative HPLC separates the target peptide from everything else the synthesis produced.

  3. Freeze-drying

    The purified solution is frozen and dried under vacuum into a stable cake that keeps well in the cold.

  4. Fill and finish

    Vials are filled, stoppered and crimp-sealed, and each one carries its lot number on the label.

  5. Testing and release

    A lot is released only when its results meet the specification, and its certificate of analysis travels with it.

The full process
Freeze-drying chamber with its door and shelves, running a cycle.

The catalogue

25 products and 20 compounds. Every peptide is sealed in a labelled vial and released with a certificate of analysis for its lot.

View all 25 products

Supplied to more than 170 countries

Every lot is released from our laboratory in Switzerland with its certificate of analysis.

Our exclusive distributor handles orders and delivery in those countries, and every vial it ships carries a Lyotek lot number you can trace back to us.

How distribution works

The laboratory in Allschwil

Synthesis, purification, freeze-drying, filling and release happen in one laboratory in Allschwil, so every vial can be traced to the batch record that produced it.

About the laboratory

Press

Announcements from the laboratory.

All press releases
A technician in blue gloves holding a vial up to an inspection booth.

Certification

Five facility certificates published

Certification Assurance International issued Lyotek Labs five facility certificates on 27 October 2026, and all of them are now published on this site as the issuer's PDFs.