Mod-GRF (1-29) reconstitution calculator.
A 2 mg vial of Mod-GRF (1-29) dissolved in 2 mL of bacteriostatic water is 1,000 mcg per mL, which is 10 mcg per unit on a U-100 insulin syringe.
Mod-GRF 1-29 is sermorelin's 29 amino acid sequence with four substitutions that slow its breakdown, and it is the same peptide sold as CJC-1295 no-DAC. Vials come in 2 mg and 5 mg, and the commonly quoted 1,000 mcg/mL assumes the 2 mg one. At the same water volume the 5 mg vial is 2.5 times as concentrated, so a 2 mg table read against it gives unit counts 2.5 times too high.
Reference range often cited for Mod-GRF (1-29): 100–200 mcg, shown for orientation only, not a recommendation. Enter your own target below. Read the evidence →
Each unit on a 100u · 1.0 mL syringe ≈ 10 mcg of this solution.
Show the math
More water → lower concentration → more units for the same amount.
How much bacteriostatic water for a Mod-GRF (1-29) vial?
There is no single correct volume. More water gives a weaker solution, so each unit on the syringe holds less Mod-GRF (1-29) and a given amount takes more units to measure, which is easier to read on the syringe scale. Less water does the opposite. These tables show the concentration for each common vial size across the usual volumes. They are arithmetic, not a recommendation of how much to take.
| BAC water | Concentration | Per 1 unit | Per 10 units |
|---|---|---|---|
| 1 mL | 2,000 mcg/mL | 20 mcg | 200 mcg |
| 1.5 mL | 1,333 mcg/mL | 13.3 mcg | 133 mcg |
| 2 mL | 1,000 mcg/mL | 10 mcg | 100 mcg |
| 2.5 mL | 800 mcg/mL | 8 mcg | 80 mcg |
| 3 mL | 667 mcg/mL | 6.7 mcg | 67 mcg |
| BAC water | Concentration | Per 1 unit | Per 10 units |
|---|---|---|---|
| 1 mL | 5,000 mcg/mL | 50 mcg | 500 mcg |
| 1.5 mL | 3,333 mcg/mL | 33.3 mcg | 333 mcg |
| 2 mL | 2,500 mcg/mL | 25 mcg | 250 mcg |
| 2.5 mL | 2,000 mcg/mL | 20 mcg | 200 mcg |
| 3 mL | 1,667 mcg/mL | 16.7 mcg | 167 mcg |
How many units of Mod-GRF (1-29) is a given amount?
Divide the amount in micrograms by the micrograms per unit for your mix. With a solution of 2,500 mcg per mL, one unit on a U-100 syringe holds 25 mcg, so any amount in mcg divided by 25 gives the units. The calculator above does this for you from your own vial and water, and the tables give the per-unit figure for each common mix.
Why does Mod-GRF (1-29) need its own calculation?
- 2 mg in 2 mL is 1,000 mcg/mL, so 100 mcg is 10 units. 5 mg in the same 2 mL is 2,500 mcg/mL, where 100 mcg is 4 units. 5 mg in 5 mL brings it back to 1,000 mcg/mL.
- A vial labeled only CJC-1295 could be this peptide or the DAC version, which lasts days rather than about half an hour and is discussed at amounts an order of magnitude higher. The Mod-GRF name is unambiguous; CJC-1295 on its own is not.
- Sermorelin is the unmodified 1-29 sequence and is sold in 5 mg and 10 mg vials. Different molecule, different vial sizes, so sermorelin tables do not transfer here even though both names describe the same stretch of GHRH.
- The frequently cited CJC-1295 human trials tested the DAC form, not this peptide, so there are no trial figures for Mod-GRF to compare against.
How is Mod-GRF (1-29) administered, and what does the math look like?
How Mod-GRF (1-29) is actually administered, with the concentration arithmetic written out. Amounts in these tables are illustrative examples of the math, never a recommendation.
Mod-GRF (1-29): research formats
Choose the format you are researching to see route-specific notes.
Mod-GRF 1-29 and CJC-1295 no-DAC are the same compound, so the same format applies.
Mod-GRF (1-29) is the IUPAC-correct name for what vendors often sell as CJC-1295 no-DAC. Sold as a 2 mg lyophilized vial; 2.0 mL BAC water reconstitution gives 1,000 mcg/mL.
Mod-GRF (1-29) reconstitution: common questions
Is Mod-GRF 1-29 the same as CJC-1295?
It is the same peptide as CJC-1295 no-DAC, sold under a different name. CJC-1295 DAC is the same backbone with an albumin-binding complex attached, which extends the half-life from roughly 30 minutes to several days. Only the no-DAC form is Mod-GRF.
How many units is 100 mcg on a 5 mg Mod-GRF vial?
On 5 mg in 2 mL (2,500 mcg/mL) it is 4 units. On 5 mg in 5 mL (1,000 mcg/mL) it is 10 units, the same reading as a 2 mg vial in 2 mL.
Is Mod-GRF the same as sermorelin?
No. Sermorelin is native GHRH(1-29). Mod-GRF carries four substitutions, including a D-alanine at position 2, that slow its breakdown by DPP-IV. They are separate molecules in separate vials, so units for one never apply to the other.
What the evidence on Mod-GRF (1-29) actually shows
Knowing the concentration is not the same as knowing whether to use it. These are the strongest studies behind the Mod-GRF (1-29) profile, labelled with the study type PubMed itself assigns.
- Randomized controlled trial · 2006Prolonged 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 adultsThe Journal of clinical endocrinology and metabolism · PMID 16352683
- Clinical trial · 2006Pulsatile secretion of growth hormone (GH) persists during continuous stimulation by CJC-1295, a long-acting GH-releasing hormone analogThe Journal of clinical endocrinology and metabolism · PMID 17018654
- Journal article · 2010Identification of CJC-1295, a growth-hormone-releasing peptide, in an unknown pharmaceutical preparationDrug testing and analysis · PMID 21204297
This page is arithmetic on numbers you enter. It does not recommend an amount of Mod-GRF (1-29), and nothing here is medical advice. For what the published evidence actually supports, read the Mod-GRF (1-29) profile, and for regulatory status see is Mod-GRF (1-29) legal. Reviewed June 1, 2026.
Different question? The general reconstitution calculator covers every compound on the site, the blend calculator handles multi-peptide stacks, and vial longevity turns a vial into weeks of supply.
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