Calculate the Correct GHK-Cu Dose: Reconstitution, Units, Timing, and Cycle

How Perfect B Aesthetic Medicine doses GHK-Cu in a supervised clinical protocol

Perfect B - Blog - GHK-Cu Dosage Calculator - Copper peptide vial and syringe with clinical protocol
Valeria Marulanda

Valeria Marulanda

Valeria Marulanda is a board-certified Family Nurse Practitioner (FNP-BC) with a Bachelor of Science in Nursing from Florida Atlantic University and a Master of Science in Nursing from St. Thomas University. Since 2018, she has specialized in medical aesthetics, focusing on face and body treatments. Valeria loves longevity, science-driven skin treatments, and regenerating the human body from the inside out.

NPI Registry:

Calculate the correct GHK-Cu dose with the interactive tool from Perfect B Aesthetic Medicine. Reconstitution, daily dose, Day 16 step-up, and 30 day cycle.

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Perfect B Aesthetic Medicine | 06.24.26 | 5 min read.

This article is for educational purposes only and does not constitute medical advice. Peptide therapy requires evaluation and prescription by a licensed medical provider. Do not use this information to self-administer or self-diagnose. Contact Perfect B at (786) 502-2260 to schedule a clinical evaluation.

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For the exact dosing protocol our patients follow, check the full guide.
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How Do You Reconstitute GHK-Cu?

Use the volume the calculator returns above and add bacteriostatic water to your vial based on its size.

  • If your vial is 2 mg, add 1 ml of bacteriostatic water.
  • If your vial is 5 mg, add 2.5 ml of bacteriostatic water.
  • If your vial is 10 mg, add 5 ml of bacteriostatic water.
  • Gently swirl the vial to dissolve. Do not shake. Refrigerate after reconstitution.

What Is the Concentration of GHK-Cu in Your Vial?

Concentration is held constant across every vial size so your unit count never changes.

  • 2 mg vial reconstituted with 1 ml BAC water = 0.02 mg per unit.
  • 5 mg vial reconstituted with 2.5 ml BAC water = 0.02 mg per unit.
  • 10 mg vial reconstituted with 5 ml BAC water = 0.02 mg per unit.
  • One unit on a 1 ml insulin syringe always equals 0.02 mg of GHK-Cu, regardless of vial size.

How Many Units of GHK-Cu Do You Inject Per Day?

Draw to the unit line on your insulin syringe, not to a milligram figure. GHK-Cu starts low and steps up mid-cycle.

  • Daily range: 4 to 8 units per day on a 1 ml insulin syringe.
  • At the low end (4 units): 0.08 mg of GHK-Cu per injection.
  • At the high end (8 units): 0.16 mg of GHK-Cu per injection.
  • Dose ladder: start at the low end for the first 15 days. Increase to the high end at Day 16 of the cycle.
Perfect B - Blog - GHK-Cu Dosage Calculator - Reconstitution with bacteriostatic water and insulin syringe
Draw 4 units for the first 15 days, then 8 units from Day 16 onward. 1 unit equals 0.02 mg of GHK-Cu.

When Do You Inject GHK-Cu?

GHK-Cu is the only Perfect B Aesthetic Medicine peptide dosed every day, not on a 5-on/2-off pattern.

  • Injection site: subcutaneous, abdomen.
  • Timing: at night.
  • Frequency: daily, every day of the cycle.
  • Site rotation: inject in the same abdominal area, rotating slightly each session.

What Is the Cycle for GHK-Cu?

GHK-Cu runs in 30 day cycles with a 30 day pause between them.

  • On phase: 30 days of daily injections.
  • Dose increase: at Day 16 inside the on phase, the dose steps from the low end to the high end of the range.
  • Off phase: 30 days pause.
  • Repeat: 30 days on, 30 days off, repeat the structure.

Clinical tip: dose increases at Day 16. Inject in the same abdominal area, rotating slightly each session.

Want the Same Protocol Built Around Your Goals?

Perfect B Aesthetic Medicine’s peptide protocol tool is built on real clinical data from 2,000+ patients treated in Florida.

Answer 6 questions and see what patients with similar goals are running: which peptides they use, typical dosing, injection schedule, reconstitution steps, cycle length, and when they pause.

See patient protocols at peptides.perfectb.com

Why Calculate Your GHK-Cu Dose at Perfect B Aesthetic Medicine and Not at Home

A calculator gives you the numbers. A clinic gives you the answer to whether those numbers are safe for you. The protocol behind the tool above runs the same way for every patient at Perfect B Aesthetic Medicine, and that is what separates a supervised cycle from a guess at the kitchen counter.

  • Pharmacy-grade sourcing: your GHK-Cu is dispensed through a licensed compounding pharmacy. Identity, copper-binding integrity, purity, and sterility are documented. Grey-market online vials carry none of those guarantees.
  • Pre-protocol screening: labs, medical history, and contraindications are reviewed before a single vial is prescribed. Skin condition, allergy to copper, and active dermatologic issues change the answer.
  • Measured response: GHK-Cu works on skin density, collagen, and hair quality. Response is tracked by clinical assessment and photography, not by guesswork.
  • Reconstitution done right: a mistake at the BAC water step changes your dose by an order of magnitude. The clinic walks you through the first reconstitution so the math is correct from injection one.
  • Day 16 dose change: the mid-cycle step up is easy to forget at home. The clinic builds a written cycle calendar so the dose change happens on schedule.
  • Florida-based clinical context: Perfect B Aesthetic Medicine is the clinic with the most peptide patients seen in Florida. That volume means every parameter in the calculator has been pressure-tested across thousands of real cycles.

You can run the calculator at home. You should not run the protocol at home. The numbers are accurate, but they are only safe inside a clinical relationship that screens you, supervises you, and adjusts when your physiology calls for it.

Frequently Asked Questions

1. What is the correct GHK-Cu dose for you?

4 to 8 units per day on a 1 ml insulin syringe, equal to 0.08 to 0.16 mg per day. Start at 4 units. Step up to 8 units at Day 16.

2. How do you reconstitute your GHK-Cu vial?

Add 1 ml of bacteriostatic water for a 2 mg vial, 2.5 ml for a 5 mg vial, 5 ml for a 10 mg vial. Gently swirl. Refrigerate after reconstitution.

3. Where do you inject GHK-Cu?

Subcutaneous, in the abdomen. Inject in the same area, rotating slightly each session.

4. Is this calculator a substitute for a consultation?

No. It surfaces the parameters the supervised protocol uses. The protocol itself starts with a medical evaluation, contraindication screening, and a written prescription from Perfect B Aesthetic Medicine.

  • 📍 Visit us at Perfect B Aesthetic Medicine | 3905 NW 107th Ave, Suite 104, Doral FL 33178
  • 📞 Call or message us at (786) 502-2260
  • 💳 Buy Now Pay Later available: Cherry, Klarna, Afterpay, CareCredit

Book your peptide consultation at Perfect B Aesthetic Medicine today.

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