Peptide entry
Retatrutide
InvestigationalPeptide
Also known as: Triple agonist
Evidence / context
Evidence: Emerging. Use context is formulation-dependent.
Available vial formats
Retatrutide
- Conservative 1 mg once weekly (25 units per weekly injection)
- Standard 2-4 mg once weekly (50-100 units per weekly injection)
- Aggressive 6-8 mg once weekly (150-200 units per weekly injection) only with slow titration and clear tolerance
- Cycle length 12-24+ weeks.
- Best timing Same day each week.
- Concentration note at 10 mg / 2.5 mL (4 mg/mL) a 6-8 mg dose is 1.5-2.0 mL and exceeds one U-100 syringe. Use the 20 mg vial concentration (8 mg/mL) for higher doses, or split the draw.
Retatrutide
- Conservative 1 mg once weekly (12.5 units per weekly injection)
- Standard 2-4 mg once weekly (25-50 units per weekly injection)
- Aggressive 6-8 mg once weekly (75-100 units per weekly injection) only with slow titration and clear tolerance
- Cycle length 12-24+ weeks.
- Best timing Same day each week.
Titration schedule
- Weeks 1-2: 1 mg once weekly
- Weeks 3-4: 2 mg once weekly
- Weeks 5-6: 3 mg once weekly
- Weeks 7-8: 4 mg once weekly
- Weeks 9-10: 5 mg once weekly
- Weeks 11-12: 6 mg once weekly
- Weeks 13-14: 7 mg once weekly
- Week 15+: 8 mg once weekly maximum cap
- Increase every 2 weeks only if tolerated.
- Hold the current dose longer if nausea, reflux, constipation, appetite suppression, fatigue, or sleep disruption becomes problematic.
- Do not exceed 8 mg/week in this guide.
- Higher research doses have been studied, but this guide caps at 8 mg/week.
Reconstitution
- Swab vial tops with alcohol
- Draw 2.5 mL bacteriostatic water
- Inject slowly down vial wall (don't blast powder)
- Gently swirl - do not shake
- Rest 5-10 min to dissolve
- Refrigerate 2-8 C
Dosing, cycle & timing
- Conservative 1 mg once weekly (25 units per weekly injection)
- Standard 2-4 mg once weekly (50-100 units per weekly injection)
- Aggressive 6-8 mg once weekly (150-200 units per weekly injection) only with slow titration and clear tolerance
- Cycle length 12-24+ weeks.
- Best timing Same day each week.
- Concentration note at 10 mg / 2.5 mL (4 mg/mL) a 6-8 mg dose is 1.5-2.0 mL and exceeds one U-100 syringe. Use the 20 mg vial concentration (8 mg/mL) for higher doses, or split the draw.
Timing: Evening can be useful if nausea is easier to manage overnight.
Support / expected effects
- Strong appetite suppression/fat loss.
- Improved insulin sensitivity.
- May increase energy expenditure.
Side effects / tolerability
- Nausea/heartburn.
- Fatigue/cold feeling.
- Constipation.
Practical tips
- Increase only if sides mild.
- Protein + lifting to preserve muscle.
- Hold titration if reflux worsens.
- 10 mg and 20 mg vials use the same biological dose range; vial size only changes concentration and units draw.
- Do not use the 20 mg vial concentration as a reason to titrate faster.
Storage
Refrigerated: ~45-60 days.
Calculate the exact draw for RetatrutidePreloads your vial and water amount into the calculator.
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FAQ
What is Retatrutide explored for?
Strong appetite suppression/fat loss. Improved insulin sensitivity. May increase energy expenditure.
How is Retatrutide reconstituted?
1) Swab vial tops with alcohol 2) Draw 2.5 mL bacteriostatic water 3) Inject slowly down vial wall (don't blast powder) 4) Gently swirl - do not shake 5) Rest 5-10 min to dissolve 6) Refrigerate 2-8 C
What is a typical cycle length for Retatrutide?
12-24+ weeks.
How are doses measured in syringe units here?
Units mean U-100 insulin-syringe gradations (1 mL = 100 units), not International Units. Use the calculator to convert a dose into the exact draw for your vial and water amount.
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