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CJC-1295 2 mg Vial: Reconstitution and Dosing Chart

How much bacteriostatic water to add to a 2 mg vial of CJC-1295, the concentration you get, and a full dose-to-units chart.

Medical review pendingGHRH analogUpdated
Vial size
2 mg
With 2 mL water
1 mg/mL
common choice
10 units contain
100 mcg
at 2 mL, U-100
Whole vial
200 units
2 mL on a U-100 scale

How much water to add

Bacteriostatic water only changes the concentration, not the amount of CJC-1295 in the vial. More water means more units per dose (easier to read), less water means fewer.

CJC-1295 2 mg vial: concentration by water added
Water addedConcentration10 units contain100 mcg isWhole vial
1 mL2 mg/mL200 mcg5 u100 u
2 mL1 mg/mL100 mcg10 u200 u
2.5 mL0.8 mg/mL80 mcg12.5 u250 u
3 mL0.667 mg/mL66.7 mcg15 u300 u

Calculator and full dosing table

Preset to the 2 mg vial. Change any value; the table below the result updates with it.

1Vial size
2Bacteriostatic water added
3Dose per injection
4Syringe (U-100)
Draw to
30units
= 0.3 mL on a 1 mL U-100 insulin syringe
2 mg vial2 mL water300 mcg dose
Concentration
1 mg/mL
Doses per vial
6
Weeks (1 dose/wk)
6
Math only. It does not recommend a dose.

30 units (0.3 mL) on a 1 mL U-100 syringe: 300 mcg from a 2 mg vial + 2 mL water (CJC-1295).

Dosing table for a 2 mg vial

Syringe units (U-100) for each dose, by how much bacteriostatic water you add.

CJC-1295: U-100 syringe units per dose for a 2 mg vial
Dose1 mL water2 mL water2.5 mL water3 mL water
100 mcg51012.515
200 mcg10202530
300 mcg153037.545
500 mcg255062.575
1000 mcg50100125150
2000 mcg100200250300

How the math works

Concentration is the vial's milligrams divided by the water you add. Volume to draw is your dose divided by that concentration. On a U-100 syringe, 1 mL is 100 units, so units = mL × 100.

2 mg ÷ 2 mL = 1 mg/mL
300 mcg = 0.3 mg; 0.3 mg ÷ 1 mg/mL = 0.3 mL
0.3 mL × 100 = 30 units
30 units · 0.3 mL · 300 mcg from 2 mg + 2 mL
Math only. The amounts in these tables are reference values for the arithmetic, not dose recommendations.

What the CJC-1295 papers dosed, against a 2 mg vial

In GHRH-knockout mice, once-daily CJC-1295 produced normal body weight and length, while the animals treated every 48 and 72 hours reached higher weight and length than placebo without full normalisation.[3]

The healthy-adult trials gave CJC-1295 under the skin as ascending single doses, then as weekly or biweekly doses.[4]

The authors of the healthy-adult trials described CJC-1295 as relatively well tolerated, particularly at weight-based doses of 30 or 60 microg/kg.[4]

In healthy men, the two CJC-1295 doses tested in the pulsatility study gave responses that did not differ significantly.[5]

What a 2 mg CJC-1295 vial holds

2 mg of CJC-1295 in 1, 2 or 3 mL of water gives 2 / 1 / 0.67 mg/mL, which is 20 / 10 / 6.7 mcg per syringe unit.

Calculated from vial mg 2; water mL 1, 2, 3; units per mL 100. Formula: mg/mL = vialMg / waterMl; mcg per unit = mg/mL / 100 x 1000

CJC-1295 with and without DAC

A narrative review lists CJC-1295 with a Drug Affinity Complex (DAC) and CJC-1295 without DAC as separate growth hormone-releasing hormone analogues met in online self-administration.[6]

Is 2 mg a labelled CJC-1295 strength

The openFDA Drugs@FDA lookup for CJC-1295 returned no application.[7]

With 0 matching applications in Drugs@FDA there is no labelled strength to compare a 2 mg CJC-1295 vial with.

Calculated from vial mg 2; drugs fda matches 0; source s2-legal/api.fda.gov/drugsfda-cjc-1295.txt. Formula: labelled strengths available = 0

Common questions

How much water goes in a 2 mg vial of CJC-1295?

That choice only changes the concentration. With 2 mL, a 2 mg vial is 1 mg/mL; with 1 mL it is 2 mg/mL. Less water means fewer units per dose and harder-to-read marks for small doses.

How many units is 100 mcg from a 2 mg vial?

With 2 mL of water, 100 mcg is 10 units on a U-100 syringe. With other water amounts, see the table.

How many doses are in a 2 mg vial?

Divide the vial size by the dose (in the same unit). The calculator on this page shows the number of whole doses for any dose you pick.

How does water volume change the strength of a 2 mg CJC-1295 vial?

The water only sets the strength: 2 mg of CJC-1295 in 1, 2 or 3 mL is 2, 1 or 0.67 mg/mL.

Calculated from vial mg 2; water mL 1, 2, 3. Formula: mg/mL = vialMg / waterMl

Is there a studied amount to compare a 2 mg CJC-1295 vial with?

The healthy-adult trials quoted here used weight-based amounts, with 30 or 60 microg/kg named as particularly well tolerated, so no fixed human amount is available to compare with this vial.[4]

More on CJC-1295

DosageDoses used in published studies, with the source for each.CalculatorVial, water and dose to syringe units.Side effectsWhat labels and studies report, and what is unknown.ResultsStudy outcomes and when they were measured.BenefitsClaimed benefits next to what published studies measured.How it worksTarget, mechanism and how long it acts, from the label or studies.

Sources

  1. 1Metric (SI) Prefixes (NIST Reference on Constants, Units, and Uncertainty)National Institute of Standards and Technology (NIST) · 2025physics.nist.govAccessed 2 Oct 2026
  2. 2BASAGLAR (insulin glargine) injection, prescribing information (DailyMed)U.S. Food and Drug Administration / DailyMed (Eli Lilly and Company label) · 2026dailymed.nlm.nih.govAccessed 2 Oct 2026
  3. 3Once-daily administration of CJC-1295, a long-acting growth hormone-releasing hormone (GHRH) analog, normalizes growth in the GHRH knockout mouse.American journal of physiology. Endocrinology and metabolism · 2006PMID 16822960Accessed 2 Oct 2026
  4. 4Prolonged stimulation of growth hormone (GH) and insulin-like growth factor I secretion by CJC-1295, a long-acting analog of GH-releasing hormone, in healthy adults.The Journal of clinical endocrinology and metabolism · 2006PMID 16352683Accessed 2 Oct 2026
  5. 5Pulsatile secretion of growth hormone (GH) persists during continuous stimulation by CJC-1295, a long-acting GH-releasing hormone analog.The Journal of clinical endocrinology and metabolism · 2006PMID 17018654Accessed 2 Oct 2026
  6. 6The emerging landscape of performance-enhancing peptides modulating GH-IGF1 axis: bridging the gap between clinical evidence and patient self-administration.Frontiers in endocrinology · 2026PMID 42395176Accessed 2 Oct 2026
  7. 7Drugs@FDA (openFDA) search: active ingredient "CJC-1295"U.S. Food and Drug Administration · 2026api.fda.govAccessed 2 Oct 2026

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