What exactly is a peptide?

A peptide is a short chain of amino acids, smaller than a protein. Retatrutide is a synthetic peptide that acts on the GLP-1, GIP and glucagon receptors at the same time.

How do peptide injections work?

Peptides are injected subcutaneously because digestive enzymes would break them down. Retatrutide is used once a week with fixed dose steps on the pen.

Powder vial or ready-to-use pen?

Vial powder has to be reconstituted with bacteriostatic water and converted into syringe units. The pen arrives filled, with the concentration printed on the pack and fixed dose steps.

How much do peptides cost in Ireland?

€99 for the 15 mg pen, €139 for 40 mg and €219 for the 80 mg pack with two pens. Shipping is free on the 40 mg and 80 mg packs.

How do I check quality?

Every batch is HPLC-tested by an independent lab and the Certificate of Analysis with the batch number is sent on request.

Is retatrutide a licensed medicine?

No. Retatrutide is still in clinical development and is supplied as a research-grade peptide product, not as a licensed medicine.

Buy peptides in Ireland

Name: Synedica Retatrutide - peptide pen
Brand: Synedica
Availability: InStock

Lose up to 15 kg in 8 weeks , one use per week

No marketing: what peptides are, how peptide injections work and why a ready-to-use pen removes the riskiest part - working out the dose yourself.

Order now - Ireland delivery

60-day guarantee: if you're not happy you get a full refund and keep the pack

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What it is

Inside is retatrutide, a peptide built of 39 amino acids, the same building blocks that every protein in your body and your food is made from. In other words, it's a concentrated set of the individual parts of a protein.

How you use it

It comes as a pre-filled, ready-to-use pen. One click, once a week. One pen = up to 8 weekly doses = 2 months.

The result

Less hunger, steady fat loss. Up to 24% body weight.

P.S. Physical activity can slightly speed up the process and strengthen your final results.

What it is

How you use it

It comes as a pre-filled, ready-to-use pen. One click, once a week. One pen = up to 8 weekly doses = 2 months.

The result

Less hunger, steady fat loss. Up to 24% body weight.

P.S. Physical activity can slightly speed up the process and strengthen your final results.

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Peptides in plain English

A peptide is a chain of a few amino acids. A protein is the same thing, only far longer. Because the chain is short, a peptide can bind to specific receptors - and that is what separates one peptide from another. Retatrutide binds three: GLP-1, GIP and glucagon.

Most peptides sold online are freeze-dried powder: you reconstitute them, draw them into a syringe and convert the dose into units. That conversion is where most mistakes happen.

A filled pen instead of powder

The Synedica pen arrives filled, with the concentration printed on the pack and fixed dose steps. Store it in the fridge, away from direct light. The batch Certificate of Analysis is available at [email protected].

Switching from a powder vial? Convert your dose in the peptide calculator.