How do I reconstitute peptides with bacteriostatic water?

Draw bacteriostatic water into a syringe, inject slowly down the vial wall (not directly onto powder), then gently swirl until dissolved. Never shake. Store refrigerated at 2-8C and use within 28 days.

How many units should I draw on an insulin syringe?

1 mL equals 100 units on a standard insulin syringe. Divide your required volume in mL by 0.01 to get units. For example, 0.25 mL = 25 units. Use the smallest syringe that fits your dose for better precision.

What syringe size should I use for peptide injections?

0.3 mL (30 unit) syringes offer the best precision for small doses under 0.3 mL. 0.5 mL (50 unit) syringes work for most peptides. 1 mL (100 unit) syringes are needed for larger dose volumes.

Dosing Tools

Peptide Reconstitution Calculator

Calculate peptide doses with our visual syringe guide

Retatrutide Calculator

Calculate reconstitution doses for Retatrutide

Retatrutide profile Accumulation plotter

Vial Size (peptide amount)

BAC Water (added to vial)

Desired Dose

Syringe Size

Concentration 5.00 mg/mL

Doses per vial 20

1mL / 100 units

10 units

0.100 mL

How to use: Enter your vial size and the amount of bacteriostatic water you'll add. Then enter your desired dose to see exactly how much to draw.

Tip: 1 mL = 100 units on an insulin syringe. Draw slowly to ensure accuracy.

Retatrutide Reference

Retatrutide Dosing Protocols

Goal	Dose	Frequency
Starting Dose (Week 1-4)	0.5mg	Once weekly
Low Maintenance (Week 4-8)	1mg	Once weekly
Escalation (Week 8-12)	2mg	Once weekly
Moderate (Week 12-16)	4mg	Once weekly
Advanced (Week 16-20)	8mg	Once weekly
Maximum Efficacy (Week 20+)	12mg	Once weekly

Reconstitution Steps

01 Allow vial to reach room temperature (15-20 minutes)
02 Clean vial top with alcohol swab and air dry completely
03 Add calculated bacteriostatic water slowly down vial side
04 Gently swirl in circular motions—avoid vigorous shaking
05 Allow full dissolution (2-3 minutes); solution should be clear and colorless
06 Store reconstituted solution refrigerated at 2-8°C for up to 28 days
07 Inject subcutaneously; rotate sites weekly

Quick Reference

Typical Dose 0.5mg starting, titrate up to 8-12mg weekly

Frequency Once weekly (same day each week)

Half-life ~6 days

Storage Reconstituted: 2-8°C, use within 28 days

Cycle Continuous therapy as prescribed

View full Retatrutide profile

Research Purposes Only

These calculators are provided for educational and research purposes only. Always verify calculations and consult with qualified professionals. The information provided is not medical advice. Peptides should only be used in accordance with applicable laws and regulations.