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.

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Draw on a U-100 syringe

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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

This calculator answers a simple question: given the concentration of the GHRP-6 solution already in your vial, how many syringe units does today's dose work out to? It is the second half of the reconstitution math — the first half locks in concentration, this one converts any dose mg or mcg into a clean unit count.

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.

Most people use this calculator at two moments: when titrating a dose up or down, and when prepping a single dose before injection. The output is meant to be checked against the syringe before drawing — read the markings, confirm the unit count, then draw. The calculator is fast precisely so you can do that check every time without it feeling like a chore.

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.

GHRP-6 mechanism in plain English

GHRP-6 functions as a synthetic agonist for the growth hormone secretagogue receptor, type 1a (GHS-R1a). This is the identical receptor targeted by the natural hormone ghrelin, which is involved in both GH regulation and hunger signaling. The molecule's binding action at this receptor in the hypothalamus and pituitary gland directly initiates the release of a growth hormone pulse from somatotroph cells. Its less-refined structure allows it to mimic ghrelin's broad physiological actions more closely than subsequent peptides, accounting for its robust effect on appetite alongside its somatotropic function. This dual activity is a hallmark of GHRP-6's documented mechanism of action, operating independently of the GHRH receptor pathway.

Common GHRP-6 dose mistakes

  • Failing to document the potent hunger response on a consistent scale, mistaking a primary mechanistic effect for an incidental side effect.
  • Interpreting the transient increases in cortisol and prolactin as an unexpected deviation, rather than a well-documented characteristic of this first-generation molecule.
  • Analyzing data on a day-to-day basis instead of observing the aggregate trends in appetite and sleep quality scores over a multi-week timeline.
  • Neglecting to record the administration time relative to meals, which is a crucial variable for contextualizing the peptide's orexigenic impact.
  • Structuring a personal tracking log based on a template for a highly selective peptide like ipamorelin, thus omitting fields for hunger and other variables unique to GHRP-6.

Frequently asked questions about GHRP-6 dose

How does tracking for GHRP-6 differ from tracking for ipamorelin or GHRP-2?
The primary distinction is the emphasis on appetite monitoring. A log for ipamorelin would focus almost exclusively on GH-related metrics, whereas a log for GHRP-6 should feature a hunger rating (e.g., on a 1–10 scale) as a primary data field. Because GHRP-6 binds to the ghrelin receptor in a manner that strongly stimulates appetite, this orexigenic effect is a direct part of its mechanism to be observed, not a secondary consideration.
What do historical research studies indicate about cortisol and prolactin with GHRP-6?
Scientific literature dating back to the 1980s consistently shows that GHRP-6 administration leads to measurable, dose-dependent increases in plasma cortisol and prolactin. This effect is significantly more pronounced than that observed with its successors, GHRP-2 and ipamorelin. In fact, the desire to reduce these off-target hormonal effects was a major driver behind the development of those later-generation peptides.
If a 5 mg vial is prepared with 2 mL of diluent, how many units is a 100 mcg dose?
With 5 mg (or 5,000 mcg) of peptide dissolved in 2 mL of diluent, the solution's concentration becomes 2,500 mcg/mL. A U-100 syringe contains 100 units per mL, meaning each single unit delivers 25 mcg of peptide (2,500 mcg ÷ 100 units). To calculate the volume for a 100 mcg dose, one would divide the target dose by the per-unit concentration (100 mcg ÷ 25 mcg/unit), which results in a required volume of 4 units.
Why is it important to document the timing of administration relative to food intake?
Documenting administration timing against meal consumption is critical because GHRP-6 is a potent appetite stimulant. An administration on a fasted stomach may elicit a very different hunger response compared to one given shortly after a meal. Consistently recording this variable allows a researcher to better isolate and observe the peptide's direct orexigenic action across a study period.
What is the significance of His-D-Trp-Ala-Trp-D-Phe-Lys-NH2 being the 'original' GHRP?
Its discovery demonstrated the principle that small, synthetic peptides could potently stimulate GH release through a novel receptor, now known as the GHS-R1a. As the first of its kind, its well-documented activity profile, including the strong hunger effect and cortisol/prolactin elevation, served as the scientific baseline. This baseline provided the rationale for subsequent molecular engineering to create more selective agonists like ipamorelin.
Is it more useful to log data daily or to study patterns across weeks with GHRP-6?
Daily entries are necessary to capture raw data, such as dose, hunger score, and sleep rating. However, the most informative insights are derived from studying the trends and averages of this data over multiple weeks. A single day's hunger can be influenced by numerous external factors, but a pattern that emerges across a 4- to 6-week period of consistent documentation is more likely to reflect the molecule's specific influence.

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