How many units of Gonadorelin should I draw?

It depends on your vial size, BAC water, and dose. For a 2mg vial with 2mL BAC water, a beginner dose of 100mcg is typically 10 units on a U-100 syringe. Use the calculator above for your exact numbers.

How much BAC water should I add to Gonadorelin?

The standard amount is 2mL of bacteriostatic water for a 2mg vial. More water gives a more dilute solution — easier to measure small doses. Less water means fewer injections per vial. Adjust the BAC water slider in the calculator to see how it changes your syringe units.

How long does a Gonadorelin vial last?

At a beginner dose of 100mcg 2x/week, a 2mg vial lasts about 20 doses. The calculator shows exact doses per vial for your selected tier.

What syringe should I use for Gonadorelin?

Most people use a U-100 insulin syringe (1mL / 100 units). For very small doses, a U-50 or U-30 syringe gives better precision. The calculator adjusts units automatically for whichever syringe you pick.

Gonadorelin Dosage Calculator

Sexual HealthInjectionFDA Approved2-4 min half-life

Gonadorelin is a synthetic version of gonadotropin-releasing hormone (GnRH), the 10-amino-acid peptide your hypothalamus naturally pulses every 60-120 minutes to drive testosterone and fertility.

Stimulates natural LH and FSH release from the pituitaryPreserves testicular size and fertility during TRTRestarts endogenous testosterone production in PCTFDA-approved diagnostic tool with decades of clinical safety data8 weeks on / 4 weeks off

Vial Size

BAC Water (mL)

Dosing Level

100mcg · 2x/week

Custom Dose (mcg) — optional

Syringe Type

10.0 units

100 units (1mL)

Concentration

1,000

mcg/mL

Draw Volume

0.100

Syringe Units

10.0

units

Doses / Vial

doses

Summary: Add 2mL BAC water to your 2mg vial. Draw to 10.0 units on a U-100 syringe for a 100mcg dose. This vial will last 20 doses.

Cycle Planner

Cycle Length (weeks)

Price Per Vial ($) — optional

Subcutaneous. Typical beginner frequency: 2x/week.

Gonadorelin Pharmacokinetics

Pharmacokinetics — Active Dose Over Time

t½ = 2-4 min (IV), ~10-40 min (SC)

After 1 half-life (3m): 50% remainsAfter 2 half-lives (6m): 25% remainsAfter 3 half-lives (9m): 12.5% remains

At a 200mcg dose: 50% = 100mcg remaining after 3m. Recommended frequency: 2x/week.

Disclaimer: This curve is a simplified first-order exponential decay model. Actual pharmacokinetics vary based on injection site, individual metabolism, body composition, and other factors. Half-life values are approximate and based on available preclinical and clinical literature. Many research peptides lack formal human pharmacokinetic studies. This is for educational purposes only — not medical advice.

Gonadorelin Dosing Protocol

Level	Dose / Injection	Frequency
Beginner	100mcg	2x/week
Moderate	200mcg	2x/week
Aggressive	200mcg	3x/week

Note: Synthetic GnRH. FDA-approved as Factrel for pituitary diagnostic testing. Pulsatile dosing is critical — continuous exposure desensitizes GnRH receptors and suppresses LH/FSH. Space injections at least 2 days apart.

About Gonadorelin

Gonadorelin is a synthetic version of gonadotropin-releasing hormone (GnRH), the 10-amino-acid peptide your hypothalamus naturally pulses every 60-120 minutes to drive testosterone and fertility. It was FDA-approved in 1978 under the brand name Factrel for diagnostic testing of pituitary gonadotroph function. Today it's widely used off-label alongside TRT to preserve testicular function and fertility, and in post-cycle therapy to restart the HPG axis after anabolic steroid use. Its extremely short half-life means dosing protocol matters more than dose size — pulsatile subcutaneous injections maintain receptor sensitivity, while continuous exposure shuts the system down.

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