What are GLP-1 peptides?
GLP-1 peptides are one group within the larger peptide family.
GLP-1, short for glucagon-like peptide-1, is a hormone made in the gut. A GLP-1 agonist binds the GLP-1 receptor and switches it on.
Semaglutide, tirzepatide and retatrutide all do this, but they differ in how many receptors each one can reach.
All three ship as dry powder in sealed vials, which a lab mixes with liquid before use.
How researchers use GLP-1 peptides
- Receptor counts. Semaglutide binds one receptor, tirzepatide binds two and retatrutide binds three.
- Binding strength. Labs measure how tightly each one holds its target.
- Signal studies. Studies track the chemical signals a cell sends once a receptor switches on.
- Metabolic research. This is the field where the whole group is studied.
What we stock
Each compound has its own shelf: see the semaglutide category and the tirzepatide category. Retatrutide sits with them in our research peptide range, and you can order it on the retatrutide 20 mg vial page.
Every vial is quality tested for purity before we list it.
We also stock mixing supplies, including bacteriostatic water and needles and syringes, or you can browse the full store.
Shipping in Canada
We ship across Canada, and delivery takes 3 to 7 business days.
Orders go out by Canada Post or Federal Express, with tracking on every order. Orders over $399 CAD ship free.
Every box is plain and unmarked, and the label says nothing about what is inside. You can pay by Interac e-Transfer at checkout.
Common questions
What does GLP-1 stand for?
It stands for glucagon-like peptide-1, a hormone made in the gut.
How do semaglutide and tirzepatide differ?
Semaglutide acts only on the GLP-1 receptor, while tirzepatide acts on both GLP-1 and GIP receptors.
Where does retatrutide fit in?
It adds a third target, the glucagon receptor, which makes it a triple agonist.
What form do they come in?
Sealed glass vials of dry powder, which labs mix with bacteriostatic water.
How should a mixed vial be kept?
In a fridge, out of sunlight. Dry, sealed vials keep longer than mixed ones.
Sold for laboratory research only. Not for human consumption.