Dose calculator

GHRP-6 dose calculator

Convert any GHRP-6 dose into syringe units in real time, pre-filled with a 5 mg / 2 mL example.

Draw on a U-100 syringe

0.00 units

Volume to draw

0.000 mL

GHRP-6 is a short-acting injectable peptide people use to trigger pulses of their own growth hormone, often when increased appetite is also a goal. Like GHRP-2, it mimics ghrelin at the GH-secretagogue receptor, but it produces a noticeably stronger hunger response. Studies confirm clear post-injection GH peaks alongside meaningful appetite stimulation. This page covers reconstitution math and per-injection logging cadence.

How the GHRP-6 dose calculator works

GHRP-6 doses are 100-300 mcg, taken 1-3 times daily, similar to GHRP-2 but with stronger appetite stimulation. On a 5 mg vial mixed with 2 mL water (2.5 mg/mL), a 100 mcg dose draws 4 units. Same readability concern as GHRP-2.

The formula is volume in mL equals dose mg divided by concentration mg/mL, then volume times one hundred to get units on a U-100 insulin syringe. With a 2.5 mg/mL GHRP-6 solution and a 0.1 mg dose, the draw is 0.04 mL or about 4 units. Type any other dose and the unit count updates in real time — no spreadsheets, no guesswork.

Inputs that genuinely matter: concentration (which only changes when you reconstitute a new vial) and dose mass. Syringe type matters too, but only because U-100 vs U-40 changes the multiplier — almost every modern insulin syringe is U-100, which is why the math defaults to that. Edge cases worth flagging: switching from mcg to mg without checking the input unit, or carrying yesterday's unit count over to a new vial that was reconstituted with a different volume of BAC water.

Worked example

Walking one GHRP-6 dose through the math

  1. The vial holds 5 mg of GHRP-6, mixed into 2 mL of bacteriostatic water — concentration 2.50 mg/mL.
  2. Your 0.1 mg dose ÷ 2.50 mg/mL = 0.040 mL of solution to pull.
  3. Multiply by 100 (because U-100 means 100 units per mL): 0.040 × 100 = 4 units.
  4. Double the dose to 0.2 mg and the unit count doubles to 8 — the relationship is linear at a fixed concentration.
  5. Change the diluent volume and every one of these numbers moves; change the dose alone and only the last one does.

GHRP-6 titration ladder at this concentration

What different GHRP-6 dose steps draw on a U-100 insulin syringe at the example 2.50 mg/mL concentration.

Dose (mg)Volume (mL)Units (U-100)
0.050.0202
0.10.0404
0.20.0808
0.40.16016

Doubling the GHRP-6 dose doubles the unit count. Halving it halves the count. Step-ups under 5 units are hard to read accurately — re-reconstitute with more water if your titration hits that range.

Scenarios people actually run into

Three things that come up logging GHRP-6

  • You're sitting at the 0.1 mg GHRP-6 step and your prescriber bumps you up. The new dose is double — 8 units instead of 4. Same vial, same syringe, twice the volume on the line.
  • Your fingers reach for the syringe and the unit count from last week is still in your head. Half the time that number is fine; the other half, the vial changed and the right answer moved. The calculator is the second pair of eyes.
  • You skipped a week. GHRP-6 cadence is 7 doses per week, and doubling up to "catch up" almost never reads how people expect — log the skip, then log the next normal dose.

Same-category neighbor

GHRP-6 next to Tesamorelin

Both sit in the GH Secretagogue bucket — here's the dose math side by side on each one's example vial.

GHRP-6Tesamorelin
Example dose0.1 mg1 mg
Concentration2.50 mg/mL2.50 mg/mL
Units to draw440

Want the full breakdown? Tesamorelin reference →

How GHRP-6 dosing is tracked

Published research examining GHRP-6 often documents administration schedules ranging from one to three times daily, a cadence planned to study its pulsatile effect on pituitary GH output. A critical variable to record in any log is the timing of each dose relative to food intake, as this can significantly influence the observable impact on appetite. For example, a protocol might standardize administration to a fasted state, such as 30-60 minutes before a meal or prior to a nighttime sleep period, to consistently observe its effects on hunger and sleep patterns. A U-100 insulin syringe is the standard instrument used to draw and administer the precise microgram-level volumes calculated from a reconstituted solution.

When constructing a long-term research plan, maintaining a consistent schedule is crucial for generating a clean dataset. The documented effects of GHRP-6 on cortisol and prolactin mean that a comprehensive log may also include fields for subjective stress levels, perceived water retention, or disturbances in sleep architecture. Documenting these secondary variables alongside primary metrics like hunger ratings allows for a more holistic observation of the molecule's physiological impact. The goal is to build a detailed record where correlational analyses can be performed over the entire study duration.

A practical scheduling note that comes up repeatedly in long-running GHRP-6 logs is the interaction between the peptide's strong appetite stimulus and the rest of the day's eating pattern. A pre-bed administration that produces a sharp hunger response within thirty to sixty minutes can derail a fasted overnight window, while a pre-meal administration may amplify caloric intake well beyond the planned baseline. Researchers who handle this as a variable rather than a nuisance typically also record the size and macronutrient composition of the meal that follows each dose, since the same hunger score after a high-protein meal and after a snack of refined carbohydrate are not equivalent data points. Building these fields into the log from the first day of a cycle avoids a common failure mode where a reader looks back at week four of an otherwise meticulous record and discovers that the single most distinctive variable for this molecule was never captured.

Common GHRP-6 dose-calculation mistakes

  • Interpreting the transient increases in cortisol and prolactin as an unexpected deviation, rather than a well-documented characteristic of this first-generation molecule.

Frequently asked questions about GHRP-6 dose calculator

How does the GHRP-6 dose calculator turn mg into syringe units?
It runs two divisions in sequence. First it computes concentration (vial mg ÷ diluent mL) — for the example here that's 5 ÷ 2 = 2.50 mg/mL. Then it divides your dose by that concentration to get volume in mL, and multiplies by 100 to convert volume into U-100 syringe units. The output updates as you type so you can sanity-check before drawing. GHRP-6 stimulates appetite measurably (ghrelin pathway) — log appetite alongside the dose to see the pattern.
Does the GHRP-6 dose calculator know which syringe I'm using?
It assumes a U-100 insulin syringe — the most common type for sub-cutaneous peptide injections. U-100 means 100 units per mL. If you're using a U-40 syringe (rare outside veterinary contexts) the unit count is wrong by a factor of 2.5. Tuberculin syringes read in mL directly, so on those just use the volume figure. GHRP-6 stimulates appetite measurably (ghrelin pathway) — log appetite alongside the dose to see the pattern.
Why does the same GHRP-6 dose pull a different unit count today than last week?
Because either the vial or the diluent volume changed. Concentration depends on both. A 5 mg vial reconstituted with 1 mL is twice as concentrated as the same vial with 2 mL — same dose, half the units. Whenever you open a fresh vial, run the dose math again rather than carrying the prior count over. GHRP-6 stimulates appetite measurably (ghrelin pathway) — log appetite alongside the dose to see the pattern.
What if my GHRP-6 dose lands at fewer than 5 units?
That's the calculator telling you the current vial is too concentrated for the dose you want. Five units on a U-100 syringe is hard to read accurately — the markings get tight. Reconstitute the next vial with more bacteriostatic water (commonly 2 mL instead of 1 mL) so each dose covers a larger, cleaner volume. GHRP-6 stimulates appetite measurably (ghrelin pathway) — log appetite alongside the dose to see the pattern.

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