Side-by-Side Comparison · 2026

GLP-1 vs GIP

GLP-1 vs GIP — mechanism, half-life, dosing, and research status compared. Which is right for your protocol?

GLP-1
Incretin Hormone

Glucagon-like peptide-1 (GLP-1 7-36 amide) is a 30-amino acid incretin hormone secreted postprandially by intestinal L-cells in response to nutrient ingestion, particularly fats and carbohydrates. GLP-1 is the parent molecule underlying the most important class of diabetes and ob...

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GIP
Incretin Hormone

Glucose-dependent insulinotropic peptide (GIP) is a 42-amino acid incretin hormone secreted by K-cells of the small intestinal mucosa in response to nutrient ingestion. Along with GLP-1, GIP accounts for the incretin effect -- the amplification of glucose-stimulated insulin secre...

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Key Parameters
Parameter GLP-1 GIP
Category Incretin Hormone Incretin Hormone
Research Clinical FDA Approved (via dual agonists)
Half-Life 1.5-2 min (plasma, rapidly degraded by DPP-4) ~7 min (plasma; degraded by DPP-4)
Typical Dose 0.75-1.5 pmol/kg/min (IV research infusion) Tirzepatide: 5-15 mg SC weekly
Frequency Post-prandial release; IV for research Weekly (tirzepatide)
Route Intravenous (research); analogs SC/oral Endogenous; SC (via dual agonist)
FDA Status Not approved (analogs are FDA-approved) Tirzepatide (dual GIP/GLP-1) FDA approved (Mounjaro, Zepbound)

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Frequently Asked Questions
What is the difference between GLP-1 and GIP?
GLP-1: Glucagon-like peptide-1 (GLP-1 7-36 amide) is a 30-amino acid incretin hormone secreted postprandially by intestinal L-cells in response to nutrient ingestion, particularly fats and carbohydrates. GLP... GIP: Glucose-dependent insulinotropic peptide (GIP) is a 42-amino acid incretin hormone secreted by K-cells of the small intestinal mucosa in response to nutrient ingestion. Along with GLP-1, GIP accounts ...
Which has a longer half-life, GLP-1 or GIP?
GLP-1 half-life: 1.5-2 min (plasma, rapidly degraded by DPP-4). GIP half-life: ~7 min (plasma; degraded by DPP-4).
Can you stack GLP-1 and GIP?
GLP-1 and GIP are in the same category and used together in research protocols. Always consult relevant literature and follow appropriate guidelines.

For research use only. Not medical advice. ASCEND does not conduct or endorse any specific research protocol. Always consult relevant scientific literature and regulatory guidelines.