Vial duration

Hexarelin vial duration calculator

Estimate how many weeks one 5 mg Hexarelin vial covers at your dose and weekly cadence.

iPhone · Free to download

Last updated: May 13, 2026

Vial (mg)

Dose (mg)

Doses / week

Total doses

Lasts

3.6 weeks

Hexarelin weeks-of-supply at common cadences

How long one 5 mg Hexarelin vial covers at a 0.1 mg per dose, for three weekly cadences. Total doses per vial: 50.

Doses per week	Total doses per vial	Weeks of supply
13	50	3.8
14	50	3.6
15	50	3.3

Math weeks-of-supply assumes every dose draws cleanly. Stability typically caps a reconstituted vial at 4–6 weeks of refrigerated use regardless of how much liquid remains.

Worked example

How long one Hexarelin vial lasts, the long version

Total doses in the vial: floor(5 ÷ 0.1) = 50. The floor matters — a partial dose at the bottom doesn't count.
Cadence: 14 doses per week for Hexarelin at this example step.
Math weeks-of-supply: 50 ÷ 14 = 3.6 weeks of liquid in the vial.
Stability ceiling: most reconstituted peptides are typically used within 4–6 weeks of refrigerated storage. Whichever number is smaller is the one that binds your refill date.
Doubling the dose roughly halves both numbers — and titration usually closes the gap between "math weeks" and "stability weeks" without you noticing.

Scenarios people actually run into

Three things that come up logging Hexarelin

Math says one 5 mg Hexarelin vial covers 3.6 weeks at 0.1 mg per dose. Stability typically caps a reconstituted vial at 4–6 weeks. Whichever number is smaller is the date on your refill calendar.
Titration up doubles the dose and halves the vial. A 12-week-on-paper vial becomes a 6-week vial the day you step up — order the next vial the same day you take the step.
Shipping windows are the silent third constraint. If your supplier runs 1–3 weeks, the refill order has to leave at least that long before "math weeks" or "stability weeks," whichever is binding.

Same-category neighbor

Hexarelin next to Mod GRF 1-29

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

	Hexarelin	Mod GRF 1-29
Vial	5 mg	2 mg
Cadence	14/wk	21/wk
Weeks of supply	3.6	1.0

Want the full breakdown? Mod GRF 1-29 reference →

Hexarelin is a synthetic peptide known for causing a strong, rapid release of growth hormone (GH). People use it to explore short-term spikes in GH levels, which are studied for their potential effects on connective tissue and body composition. While it’s one of the most potent growth hormone-releasing peptides (GHRPs), its effects are relatively short-lived. This page breaks down how Hexarelin is often used, from mixing and dosing to tracking its distinct effects.

Planning Hexarelin vials in real life

Hexarelin vial planning is dictated by cycle length, not just dose. Studies and personal protocols typically run 2-4 weeks because GH-pulse desensitization shows up faster with hexarelin than with GHRP-2 or GHRP-6. A 5 mg vial at twice-daily 100 mcg lasts 25 days — almost exactly one full short cycle. One vial per cycle is the typical pattern.

Stability gives no extra margin here. The 4-6 week reconstituted window roughly matches a one-vial cycle, so leftover doses past day 25 should be discarded rather than carried into the next cycle. Many hexarelin users intentionally finish a vial inside the stability window by reconstituting with 1 mL instead of 2 mL — same total doses, double the concentration, easier draws.

Storage and shelf life for Hexarelin

Proper storage is essential to maintain the stability and potency of your Hexarelin. Before reconstitution, the lyophilized (freeze-dried) powder is relatively stable. For long-term storage, it should be kept in a refrigerator, ideally between 2°C and 8°C (36°F and 46°F). This protects it from degradation caused by heat and light. Some people even store unopened vials in the freezer for maximum longevity, though refrigeration is typically sufficient for several months. It is crucial to keep the vial away from direct sunlight and extreme temperatures. A cool, dark place like a cupboard is acceptable for short-term storage, but for any period longer than a few weeks, the refrigerator is the best place for the unmixed powder to wait until you are ready to prepare it.

Once you have reconstituted the Hexarelin with bacteriostatic water, its stability changes significantly. The liquid solution is much more fragile and must be stored in the refrigerator at all times, again between 2°C and 8°C (36°F and 46°F). Never freeze reconstituted Hexarelin, as the freezing and thawing process can damage the peptide molecules, making them ineffective. The solution should be clear; if you ever notice it has become cloudy or discolored, it should be discarded. A properly stored, reconstituted vial of Hexarelin is typically considered good for about 3 to 4 weeks. After this period, its potency may begin to decline, so it’s wise to plan your usage and reconstitution schedule to ensure you are always working with a fresh, effective product.

How the Hexarelin vial duration calculator works

A 5 mg hexarelin vial covers 50 doses at 100 mcg — at twice-daily cadence that's 25 days, just inside the 4-6 week stability window. One vial typically covers a single short hexarelin study cycle.

The formula is two divisions. Total doses per vial equals vial mg divided by dose mg, rounded down. Weeks of supply equals total doses divided by doses per week. With a 5 mg vial of Hexarelin, a 0.1 mg dose, and 14 dose per week, the vial covers 50 doses, or about 3.6 weeks of supply.

The three inputs that move the answer: vial mg (set when you bought the vial), dose mg (set by your protocol step), and doses-per-week (set by the peptide's half-life). Once a vial is reconstituted it also has a stability ceiling — most lyophilized peptides reconstituted in BAC water are typically used within four to six weeks of refrigerated storage, so a vial that mathematically lasts twelve weeks may not last twelve weeks in practice.

One of the most practical parts of planning your Hexarelin research is knowing how long a vial will last. Our Vial Duration Calculator is built to give you a clear estimate, helping you manage your supplies and budget. The math is simple: it divides the total amount of peptide in your vial by the size of your dose to find the total number of doses available. For example, if you have a 5mg vial and your target dose is 0.1mg, you have a total of 50 doses in that vial (5mg / 0.1mg per dose). This number is your starting point for planning your cycle and purchasing needs.

Now, let's apply a real-world schedule. Hexarelin is often used multiple times a day due to its short action. If you are taking 14 doses per week (meaning two 0.1mg doses per day), the calculator can tell you how many weeks your vial will last. It divides the 50 total doses by your 14 weekly doses, which comes out to approximately 3.5 weeks. This simple forecast is incredibly useful. It tells you that one 5mg vial will last you just under a month with this protocol, so you can plan accordingly and ensure you don’t run out of supplies in the middle of a tracking cycle. It’s all about removing surprises and staying prepared.

This tool is also dynamic, showing you how changes in your protocol affect your supply. What if you decide to increase your dose to 0.125mg? Your vial now contains only 40 doses (5mg / 0.125mg). If you are still taking 14 doses per week, your vial will now last just under 3 weeks. Seeing this direct impact helps you understand the trade-offs of your dosing decisions. It provides a tangible, financial, and logistical perspective on your protocol, making you a smarter and more organized researcher from start to finish.

Common Hexarelin vial-planning mistakes

Storing the mixed, reconstituted vial at room temperature or in the freezer.

Frequently asked questions about Hexarelin vial duration

How does the Hexarelin vial duration calculator estimate weeks of supply?

It floors total doses (vial mg ÷ dose mg) then divides by doses per week. For this Hexarelin example — a 5 mg vial, 0.1 mg per dose, 14 dose/week — that's floor(5 ÷ 0.1) ÷ 14 = about 3.6 weeks. Flooring matters: a partial dose left in the vial doesn't count. A 4-week hexarelin study cycle uses ~1 vial at twice-daily 100 mcg — order 2 vials to cover full pulse-stacking protocols.

Should I plan refills around the math, or around stability?

Whichever runs out first. Math says Hexarelin at the example dose lasts the calendar weeks shown above. Stability says most reconstituted peptides are typically used within 4–6 weeks of refrigerated storage regardless of how much liquid is left. If the math says 12 weeks but stability caps at 5, plan around 5 — and reconstitute the next vial with less water so you finish it in the stability window. A 4-week hexarelin study cycle uses ~1 vial at twice-daily 100 mcg — order 2 vials to cover full pulse-stacking protocols.

Does titrating the Hexarelin dose up shorten vial life?

Yes, often dramatically. Doubling the dose halves the doses-per-vial. The calculator shows real-time how a step-up changes the weeks-of-supply line, so you can re-time refill orders before a titration event rather than discovering the gap mid-protocol. A 4-week hexarelin study cycle uses ~1 vial at twice-daily 100 mcg — order 2 vials to cover full pulse-stacking protocols.

What if I take Hexarelin less often than the default cadence here?

Drop the doses-per-week field. With 14 dose/week the example vial lasts about 3.6 weeks; halving the cadence roughly doubles that, but you'll hit the stability ceiling first. A vial that mathematically covers 16 weeks rarely covers 16 weeks in practice. A 4-week hexarelin study cycle uses ~1 vial at twice-daily 100 mcg — order 2 vials to cover full pulse-stacking protocols.

Related on Peptide Pilot

Track Hexarelin vials automatically

iPhone · Free · No credit card