How to reconstitute Hexarelin 5 mg

Put 1 mL of bacteriostatic water into the 5 mg Hexarelin vial. That makes 5.00 mg/mL. A 100 mcg dose is then 2.0 units on a U-100 syringe.

That volume is the one that lands the draw on a syringe line, so the reading can be checked by eye. More water makes a weaker mix and a bigger draw. Less water makes a stronger mix and a smaller one. The amount of Hexarelin in the glass never changes. Only the number of marks it takes does.

What matters first

Water to add: 1 mL
Resulting strength: 5.00 mg/mL
Example 100 mcg dose: 2.0 U-100 units

What is Hexarelin?

Hexarelin is a peptide six amino acids long, built in the early 1990s to trigger a growth-hormone pulse.

Medically reviewed by Jennifer Montecillo, MD · non-practicing medical reviewerReviewed 2026-08-12open the primary sources

How much bacteriostatic water for a 5 mg Hexarelin vial?

◆ Unique to the 5 mg vialU-100 example draws

Water added	Concentration	Per U-100 unit	Example: 100 mcg =
1 mL	5.00 mg/mL	50 mcg	2.0 units
2 mL	2.50 mg/mL	25 mcg	4.0 units

Straight arithmetic: concentration = 5 mg ÷ water, and 1 U-100 unit = 0.01 mL. The example column shows the math at 100 mcg; it is not a dose recommendation.

Which volume to use is a practical choice rather than a dose. Pick the one that puts your draw somewhere you can actually read it on the syringe. The flags in the last column mark where that fails. “Hard to measure” means the draw is too small to judge by eye. “Won’t fit” means it is bigger than one U-100 syringe holds.

Hexarelin 5 mg vial: how much water to add. Each row is what that amount draws on a U-100 syringe. 1 mL makes 5.00 mg/mL, or 50 mcg a unit, and 100 mcg is 2 units. 2 mL makes 2.50 mg/mL, or 25 mcg a unit, and 100 mcg is 4 units. The barrel drawn here is filled to 2 units, the draw at 1 mL. The sum is 5 mg divided by the water. One U-100 unit is 0.01 mL. — The 5 mg vial at 1 mL on a U-100 barrel. 100 mcg fills to 2.0 units, at 5.00 mg/mL.

How many units is a documented dose from this vial?

The table above uses one worked example. These are the published quantities, converted into marks on a U-100 barrel at each water volume for a 5 mg vial. Where a quantity was never studied by injection, the row says so.

100–200 mcg — reported, not studied

100–200 mcg once or twice a day, continued for weeks at a time, under the skin. The one study that dosed anyone for 16 weeks watched the growth-hormone response fall by nearly half over that period.

Water added	Concentration	Draw, low to high
1 mL	5.00 mg/mL	2.0 to 4.0 units
2 mL	2.50 mg/mL	4.0 to 8.0 units

indirect evidenceDominikowski A, Rękoś Z, Olejarz M, Szczepanek-Parulska E, Domin R, Ruchała M. The emerging landscape of performance-enhancing peptides modulating GH-IGF1 axis: bridging the gap between clinical evidence and patient self-administration. Front Endocrinol 2026 — tabulates self-reported online dosing patterns beside the clinical doses, stating the reported values must not be read as clinically validated, regulatory-approved or safe · retrieved 2026-08-12

Fifty draws, and the smallest readings on any page here

The larger hexarelin vial contains fifty worked doses, producing draws of two or four units. These are the smallest draws among the reconstitution guides.

3Read the full vial record — 3 notes

Two units is a dose you cannot check

At the smaller listed volume the plunger stops at two units, where one graduation is half the dose. Both readings here land on marks, which is no help at all at that size.

Landing on a mark and being measurable are different properties. This vial has the first and not the second.

The smaller vial is the better purchase

Everything the larger vial adds is powder, and everything it costs is legibility. Its readings are half those of the smaller size at every water volume.

There is no mixing choice on this page that recovers that. It is decided when the vial is bought, and this page exists partly to say so before the water goes in.

Fifty draws is not a plan

The number is only a dose count. No published source says how long the mixed vial keeps.

Fifty weekly draws would also run far past the point at which the only long human course on record saw the response fall away. The vial outlasts the evidence by a wide margin.

How do you mix it, step by step?

Wipe both stoppers with an alcohol swab and let them dry.
Draw up the water volume you picked from the table.
Let the water run slowly down the inside wall of the Hexarelin vial, rather than jetting it onto the powder.
Swirl gently until it dissolves. Shaking damages peptides.
Store it as the dispensing label directs. What happens after mixing differs by product — some labels direct against refrigerating the mixed solution at all.

What if your water volume is not on the table?

The table shows the offered water volumes. The calculator does the same arithmetic for any volume and any syringe, and shows its working line by line.

Open the Hexarelin calculator →

Where to read next about Hexarelin

The arithmetic on this page is only half the question. These are the pages that carry the other half.

Hexarelin research, dosing, and approval status

No regulator has approved hexarelin; the guide separates human studies from reported use.

Every calculator on this site, hexarelin and the rest

Every intermediate value is printed, for hexarelin or any other vial.

Every mixing and injection guide, including hexarelin

One page per vial size, because the math differs per vial, with hexarelin as one example

Hexarelin in the regulatory changelog

A proceeding with no published outcome is entered as exactly that, including hexarelin

4primary sources, each with the day we read it — open the documents used on this page