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Metabolic
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Retatrutide

Also known as: Reta

Molecular Weight

4112 Da

Half-Life

6 days

Administration

Subcutaneous injection

Longevity Score

8/10

Mechanism of Action

A novel unimolecular triple agonist of the glucose-dependent insulinotropic polypeptide (GIP), glucagon-like peptide 1 (GLP-1), and glucagon (GCG) receptors. Promotes satiety, enhances insulin sensitivity, increases energy expenditure via glucagon receptor activation, and significantly reduces liver fat.

Research-Backed Benefits

  • Significant fat loss (up to 24.2% at 48 weeks)
  • Improved metabolic health
  • Enhanced insulin sensitivity and lipid metabolism
  • Appetite regulation
  • 86% relative reduction in liver fat (MASLD)
  • Normal liver fat achieved in 85%+ of participants

Dosing Protocols

beginner

1mg weekly

intermediate

4mg weekly

advanced

8-12mg weekly

athlete

4-8mg weekly

Frequency: Once weekly · Duration: 24–48 weeks with gradual dose titration (1mg → 4mg → 8mg → 12mg every 4 weeks)

Expected Results Timeline

Week 1-2

Reduced appetite, possible GI adjustment

Week 3-4

Noticeable weight loss begins

Week 5-8

Significant fat reduction, liver fat normalization

Long Term

Metabolic optimization, up to 24% weight reduction at 48 weeks

Safety & Risks

  • GI side effects initially (nausea, diarrhea)
  • Possible muscle loss without resistance training
  • Requires gradual dose titration

Notable Research

TRIUMPH-2 Phase 3 Trial (2024)

Achieved 24.2% weight loss at 48 weeks with highest dose

DOI: 10.1038/s41591-024-03018-2

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Research Disclaimer: This information is compiled from published research and is provided for educational purposes only. Peptides discussed here are classified as research chemicals in most jurisdictions and are not FDA-approved for human use unless otherwise noted. Consult a qualified healthcare provider before starting any protocol.