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

Masteron Calculator

Calculate reconstitution doses for Masteron

Masteron profile Accumulation plotter

Vial Size (peptide amount)

BAC Water (added to vial)

Desired Dose

Syringe Size

Concentration 5.00 mg/mL

Doses per vial 0

1mL / 100 units

10000 units

100.000 mL

Exceeds syringe capacity!

Use a larger syringe or reduce dose

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.

Masteron Reference

Masteron Dosing Protocols

Goal	Dose	Frequency
Cutting / Aesthetic Enhancement	300-400 mg/week	Every other day (propionate) or 2x per week (enanthate)
Contest Preparation	400-500 mg/week	Every other day or daily (propionate)
AI Replacement / Estrogen Management	200-300 mg/week	Every other day (propionate) or 2x per week (enanthate)

Reconstitution Steps

01 Wash hands thoroughly and prepare a clean work surface
02 Wipe vial stopper with alcohol swab and allow to dry
03 Draw air into syringe equal to the volume of drostanolone to be withdrawn
04 Insert drawing needle through vial stopper and inject air to equalize pressure
05 Invert vial and withdraw the prescribed dose, tapping to remove air bubbles
06 Switch to injection needle (do not inject with drawing needle)
07 Clean injection site with alcohol swab in circular motion outward
08 Insert needle at 90-degree angle into ventrogluteal, vastus lateralis, or deltoid muscle
09 Aspirate briefly (optional per current guidelines), then inject slowly over 10-30 seconds
10 Withdraw needle, apply gentle pressure with gauze, dispose of needle in sharps container

Quick Reference

Typical Dose 300-500 mg/week

Frequency Every other day (propionate) or 2x per week (enanthate)

Half-life ~2 days (propionate), ~10 days (enanthate)

Storage Room temperature (68-77F). Protect from light.

Cycle 8-12 weeks (propionate) or 10-14 weeks (enanthate)

View full Masteron 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.