Dulaglutide vs Sermorelin

A detailed comparison to help you understand the differences and choose the right peptide for your research goals.

Dulaglutide

Dulaglutide (Trulicity) is a once-weekly GLP-1 receptor agonist for type 2 diabetes. Its larger molecular size from fusion with an Fc fragment extends half-life and may reduce some GI side effects.

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Sermorelin

Sermorelin is a synthetic analog of GHRH consisting of the first 29 amino acids of the natural hormone. It was previously FDA-approved for GH deficiency diagnosis and treatment in children.

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Side-by-Side Comparison

Aspect	Dulaglutide	Sermorelin
Dose Range	750 mcg–4.5 mg	100 mcg–300 mcg
Frequency	Less than daily	1x daily
Cycle Length	12–52 weeks	8–12 weeks
Route	subcutaneous	subcutaneous
Mechanism	GLP-1 analog fused to a modified human IgG4 Fc fragment, providing extended duration of action. Activates GLP-1 receptors for glucose-dependent insulin secretion and appetite suppression.	Binds to GHRH receptors in the pituitary gland to stimulate natural GH production and release. Maintains the body's natural feedback mechanisms for GH regulation.
Typical Dosage	Start at 0.75mg once weekly, may increase to 1.5mg, 3mg, or maximum 4.5mg weekly based on glycemic response.	Typical dosing: 200-500mcg administered once daily, usually before bed. Some protocols use twice daily dosing.
Administration	Subcutaneous injection once weekly, any time of day, with or without food. Comes in pre-filled single-dose pens.	Subcutaneous injection, preferably at bedtime to work with natural GH release patterns. Can be combined with GHRPs for synergistic effects.
Side Effects	Nausea, diarrhea, vomiting, abdominal pain, decreased appetite. Generally well-tolerated with gradual dose titration.	Generally well-tolerated. May cause injection site reactions, headache, flushing, or dizziness. Less side effects than direct GH administration.
Best For	Fat Loss	Muscle Growth Fat Loss Recovery & Healing Sleep Quality