Dulaglutide vs MK-677 (Ibutamoren)

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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MK-677 (Ibutamoren)

MK-677, also known as Ibutamoren, is an orally active growth hormone secretagogue. Unlike peptides, it can be taken orally and has a long half-life, providing 24-hour GH elevation.

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Side-by-Side Comparison

Aspect	Dulaglutide	MK-677 (Ibutamoren)
Dose Range	750 mcg–4.5 mg	10 mg–25 mg
Frequency	Less than daily	1x daily
Cycle Length	12–52 weeks	8–24 weeks
Route	subcutaneous	oral
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.	Acts as a potent, selective agonist of the ghrelin receptor (GHS-R1a). Increases GH and IGF-1 levels without affecting cortisol. Mimics ghrelin's GH-releasing effects.
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: 10-25mg taken orally once daily. Often taken at night due to sleep benefits and appetite increase.
Administration	Subcutaneous injection once weekly, any time of day, with or without food. Comes in pre-filled single-dose pens.	Oral administration (capsule or liquid). Can be taken with or without food. Long half-life allows once-daily dosing.
Side Effects	Nausea, diarrhea, vomiting, abdominal pain, decreased appetite. Generally well-tolerated with gradual dose titration.	Increased appetite and water retention are most common. May cause lethargy, vivid dreams, and mild numbness. Can affect blood glucose and insulin sensitivity.
Best For	Fat Loss	Muscle Growth Fat Loss Recovery & Healing Sleep Quality