Retatrutide is a next-generation “triple threat” peptide that targets GLP-1, GIP, and glucagon receptors for major support in appetite control, metabolism, and weight loss. With a ~6-day half-life, it fits perfectly into an easy once-weekly routine.

Reconstitution

To prep your vial:

Add 4.0 mL bacteriostatic water
Final concentration = 5.0 mg/mL
Smooth, accurate dosing every time

Fun fact: At 5.0 mg/mL, 1 unit on a U-100 syringe = 50 mcg

Typical Weekly Dose Range

• 1–8 mg once weekly (slow escalation over 12+ weeks recommended)
• Gradual escalation → 1 mg → 2 mg → 4 mg → 8 mg
• Minimum 12-week titration recommended in research settings.

Syringe Math

• At 5.0 mg/mL → 1 unit = 0.01 mL ≈ 50 mcg (U-100 insulin syringe)

Storage

Before mixing: Freeze at –20 °C (–4 °F)
After mixing: Refrigerate at 2–8 °C (35.6–46.4 °F)
Best used within 2–4 weeks

Keep away from heat, sunlight, and curious pets.

Dosing & Reconstitution Guide

Once-Weekly Titration Schedule

This is the same gradual ramp used in clinical trials:

Phase	Weekly Dose	Syringe Units
Weeks 1–4	1 mg (1,000 mcg)	20 units
Weeks 5–8	2 mg (2,000 mcg)	40 units
Weeks 9–12	4 mg (4,000 mcg)	80 units
Week 13+	8 mg (8,000 mcg)	160 units

*Split dose or multiple vials may be required.

Frequency: Once weekly, subcutaneous.
Why slow escalation? Minimizes GI-related effects and follows structured clinical study approaches.

How to Reconstitute (Step-by-Step)

Draw 2.0 mL bacteriostatic water with a sterile syringe
Inject slowly down the vial wall
Gently swirl (don’t shake like a cocktail shaker)
Label with the date
Refrigerate at 2–8 °C

Why 4.0 mL?

You maintain a consistent 5.0 mg/mL concentration, which keeps syringe math identical to the 10 mg and 40 mg versions.

Supplies You’ll Need

Plan based on your protocol length: Retatrutide 20 mg Vials

12-week plan: ~2 vials
24-week plan: ~7 vials
48-week plan: ~16 vials

Syringes

1 per week

12 weeks → 12 syringes
24 weeks → 24 syringes
48 weeks → 48 syringes

Bacteriostatic Water

2.0 mL per vial

12 weeks → 8 mL
24 weeks → 28 mL
48 weeks → 64 mL

Alcohol Swabs

2 per week

12 weeks → 24
24 weeks → 48
48 weeks → 96

Protocol Overview

A quick hit of the essentials:

Goal: Metabolic improvement + major weight loss (up to 24% at 48 weeks in studies)
Schedule: Once weekly
Gradual escalation → 1 mg → 2 mg → 4 mg → 8 mg
Minimum 12-week titration; trials extended up to 48 weeks
Storage: Frozen before mixing, refrigerated after

Storage Instructions

Keep your peptide happy so it can keep you happy.

Before Mixing

Freeze at –20 °C
Protect from moisture and light

After Mixing

Refrigerate at 2–8 °C
Use within 2–4 weeks
Avoid heat, sunlight, and repeated freeze-thaw cycles

Important Notes

Pick a weekly “shot day” and stick to it
Start low—2 mg is your comfort-focused launchpad
Rotate injection sites (abdomen, thigh, upper arm)
Use a new needle every time
If GI symptoms flare, stay at your current dose a little longer before escalating

How Retatrutide Works (The Science, Simplified)

Retatrutide activates three metabolic hormone receptors at once:

GLP-1 → reduces appetite + slows stomach emptying
GIP → improves insulin response + supports fat metabolism
Glucagon → increases energy use + boosts fat oxidation

The combo = a synergy that outperforms single or dual agonists.

In clinical trials:

Up to 24% body weight reduction at 48 weeks
HbA1c drops of ~2.0% in type 2 diabetes
Better lipids, blood pressure, and metabolic markers

Potential Benefits

Major weight loss over time
Better glycemic control
Improved metabolic health
Easy once-weekly routine

Common Side Effects

Most are mild and improve with titration:

Nausea
Diarrhea/constipation
Occasional injection-site redness

Starting at 2 mg instead of 4 mg drastically improves early comfort.

Lifestyle Tips to Boost Results

Prioritize protein (1.0–1.2 g/kg per day)
Hydrate, especially during dose increases
Mix resistance training + light cardio
Aim for 7–9 hours of sleep
Small, frequent meals can help early on

Injection Technique (Quick Guide)

Before You Inject

Wash hands
Clean vial + skin
Draw dose, remove air bubbles

Injecting

Pinch 1 inch of skin
Insert needle at 90° (45° if lean)
Inject slowly
Remove straight out

After

Dispose needle safely
Return vial to fridge
Rotate injection sites

Disclaimer:

All peptide products sold on this website are for research, laboratory, and educational purposes only. They are not approved by the FDA or Health Canada, are not intended for human consumption, and should not be used for medical, cosmetic, or therapeutic purposes unless specifically prescribed by a licensed healthcare professional.

The information provided on this site is for informational and educational purposes only and does not constitute medical advice. Product descriptions, protocols, or references are not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare provider before beginning any new protocol, supplement, or treatment.
By purchasing from this website, you acknowledge and agree to use these products responsibly and in accordance with all applicable laws and guidelines.