CJC-1295 + Ipamorelin: Stack, Ingredients, Research & Concentration Guide
What is the CJC-1295 + Ipamorelin stack? It is a two-peptide research combination containing CJC-1295 and ipamorelin. The name describes a combination rather than a universally standardized pharmaceutical formulation. Commonly encountered research-vendor configurations include a 5 mg CJC-1295 + 5 mg ipamorelin blend, while regulatory records have also documented compounded products with different component ratios. Most importantly, evidence for either peptide individually should not be interpreted as clinical evidence that the combined product is effective or safe.
Common nameCJC-1295 + Ipamorelin
ComponentsCJC-1295 + Ipamorelin
Common formulation5 mg + 5 mg is frequently encountered
Standardized?No — verify label
Human combination evidenceNo controlled combination trial identified
Component evidenceLimited and compound-specific
Regulatory statusNot an FDA-approved combination
Last reviewedSeptember 2026
Figure 1. Conceptual composition diagram — not a clinical protocol.
What Is CJC-1295 + Ipamorelin?
CJC-1295 + Ipamorelin is a two-component peptide research blend. CJC-1295 is a synthetic GHRH-related peptide, while ipamorelin is a growth-hormone secretagogue associated with the ghrelin receptor pathway. The two are frequently discussed or sold together, but the combination itself is not a standardized, FDA-approved pharmaceutical formulation.
Important terminology: “CJC-1295” requires additional identity information in a research context. In particular, CJC-1295 with DAC and products described as CJC-1295 without DAC / Mod GRF 1-29 should not automatically be treated as interchangeable. The principal published human pharmacodynamic study of CJC-1295 used the long-acting DAC-modified analogue.
FDA documentation has specifically noted that CJC-1295 records may involve different forms, including CJC-1295 free base, acetate, and DAC-associated forms. This is one reason a BacScience research page should identify the exact material and formulation rather than treating every product labelled “CJC-1295” as identical.
What's in CJC-1295 + Ipamorelin?
The blend contains two distinct peptide components. The mathematical concentration of each component depends on its own mass in the vial and the final liquid volume.
1
CJC-1295
GHRH-related peptide
CJC-1295 is a modified peptide related to growth-hormone-releasing hormone signalling. Published human work has primarily examined a long-acting DAC-associated form and measured pharmacokinetic and hormonal endpoints.
Research distinction: Always identify whether the material is specified as DAC or without DAC / Mod GRF 1-29.
2
Ipamorelin
Ghrelin-receptor secretagogue
Ipamorelin is a synthetic peptide associated with growth-hormone secretagogue activity through the GHS-R1a/ghrelin receptor pathway. Human research has included pharmacokinetic/pharmacodynamic work and a clinical investigation in postoperative ileus.
Research distinction: Component-level findings should not be presented as evidence for the CJC-1295 + ipamorelin combination.
Is CJC-1295 + Ipamorelin a Standardized Formulation?
No. The name does not establish one universal ratio or one universal CJC-1295 variant. A frequently encountered research-vendor format is 5 mg CJC-1295 + 5 mg ipamorelin, giving 10 mg total peptide. However, FDA documentation also describes a compounded multiple-ingredient product containing 6 mg/mL CJC-1295 and 15 mg/mL ipamorelin, demonstrating that the ratio can differ substantially between preparations.
Do not use “10 mg blend” as though it identifies each component. A 10 mg total vial could, for example, represent 5 mg + 5 mg, but the total alone does not establish the ratio. For concentration calculations, use the exact per-component quantities printed on the vial, specification sheet, or certificate of analysis.
Configuration
CJC-1295
Ipamorelin
Interpretation
Commonly encountered research blend
5 mg
5 mg
1:1 mass ratio; 10 mg total
Documented FDA compounding example
6 mg/mL
15 mg/mL
2:5 concentration ratio in that preparation
Other marketed configurations
Variable
Variable
Verify the specific label/COA
Why Are CJC-1295 and Ipamorelin Combined?
The commonly stated rationale is mechanistic rather than clinical: the two compounds are associated with different receptor systems that converge on growth-hormone signalling. That pharmacological rationale can explain why the pair appears in research and market practice, but it does not demonstrate that the specific blend improves a clinical outcome.
CJC-1295 pathway
CJC-1295 is designed around GHRH-related signalling. The human DAC-associated research literature reported sustained changes in circulating GH and IGF-I following administration of the studied analogue.
Individual-component evidence
Ipamorelin pathway
Ipamorelin acts through the ghrelin/GHS-R1a receptor system and has been investigated for GH-related pharmacology as well as a postoperative gastrointestinal indication.
Individual-component evidence
Evidence boundary: Different receptor pathways provide a biological rationale for studying a combination. They do not establish additive or synergistic efficacy, optimal formulation, safety, or clinical benefit for CJC-1295 + ipamorelin in humans.
Evidence for CJC-1295
The strongest human evidence for CJC-1295 comes from small studies of the long-acting DAC-associated analogue, not from a validated CJC-1295 + ipamorelin blend. In a randomized placebo-controlled study of healthy adults, CJC-1295 produced dose-dependent increases in circulating GH and IGF-I, with the studied long-acting analogue showing a prolonged pharmacokinetic profile.
Human study
GH / IGF-I pharmacodynamics
Teichman and colleagues evaluated CJC-1295 in healthy adults using randomized, placebo-controlled ascending-dose studies. The research focused on hormonal and pharmacokinetic endpoints rather than clinical outcomes such as muscle gain, recovery, or longevity.
Important limitation
DAC identity matters
The published human work is not evidence that every material marketed as “CJC-1295,” particularly material described as no-DAC/Mod GRF 1-29, has the same pharmacokinetics or clinical evidence.
Evidence for Ipamorelin
Ipamorelin has human pharmacokinetic/pharmacodynamic research, but the clinical evidence is limited and does not establish the CJC-1295 + ipamorelin combination. A human volunteer study characterized ipamorelin exposure and GH response. A later randomized clinical study investigated ipamorelin in postoperative ileus rather than as a general-purpose body-composition or performance intervention.
Human PK/PD
Healthy volunteers
Pharmacokinetic/pharmacodynamic modelling in healthy male volunteers found dose-proportional pharmacokinetics and a transient GH response.
Clinical limitation
Postoperative ileus study
A randomized Phase II study investigated ipamorelin in patients after bowel resection. Its clinical endpoint was gastrointestinal recovery, not validation of the CJC-1295 + ipamorelin stack.
Has the Complete CJC-1295 + Ipamorelin Combination Been Clinically Studied?
No controlled human clinical trial of the specific CJC-1295 + ipamorelin combination was identified in the sources reviewed for this page. This means the combination should not be described as clinically validated for efficacy, safety, body composition, recovery, performance, or longevity.
INDIVIDUAL EVIDENCESome human data CJC-1295 and ipamorelin have separate research records.
COMBINATION EVIDENCENo controlled trial identified No combination-specific clinical efficacy or safety dataset establishes the pair.
MARKET PRACTICECombination is commercially encountered Market availability or compounding does not establish clinical validation.
Critical distinction: A study of CJC-1295 alone is a CJC-1295 study. A study of ipamorelin alone is an ipamorelin study. Neither is a study of CJC-1295 + ipamorelin. The combination introduces an interaction question that only combination-specific research can answer.
Figure 2. Evidence-status overview for the named combination.
For a multi-component vial, calculate each peptide independently: concentration = component mass ÷ final liquid volume. Do not add the masses together and then use the total as the concentration of each peptide.
Mathematical reference formulation used below: CJC-1295 = 5 mg and Ipamorelin = 5 mg in the same vial. This is a calculation example based on a commonly encountered 5 mg + 5 mg configuration, not a statement that every CJC-1295 + ipamorelin vial has this composition.
The total peptide concentration is 5 mg/mL, but each individual peptide concentration is 2.5 mg/mL.
Example B — 5 mL final volume
CJC-1295: 5 mg ÷ 5 mL = 1 mg/mL
Ipamorelin: 5 mg ÷ 5 mL = 1 mg/mL
Increasing the liquid volume fivefold lowers each component concentration fivefold while leaving the amount of peptide in the vial unchanged.
Important: This section explains concentration mathematics only. It does not provide a human dosing protocol, recommended dose, injection volume, frequency, or treatment schedule.
What If the Blend Is Not 5 mg + 5 mg?
Use the actual mass of each component separately. For example, if a documented vial contained 6 mg CJC-1295 and 15 mg ipamorelin, those two quantities would produce different concentrations at the same final volume. FDA documentation has described a compounded preparation in precisely this type of unequal concentration format.
Example mathematical structure:
CJC-1295 concentration = 6 mg ÷ final volume Ipamorelin concentration = 15 mg ÷ final volume
Do not calculate: (6 mg + 15 mg) ÷ volume and then label the result “CJC-1295 concentration” or “Ipamorelin concentration.”
The ratio between the components is determined by their original masses. Changing the liquid volume changes both concentrations proportionally, but it does not change the underlying mass ratio.
Need to Calculate Another Vial or BAC-Water Volume?
Use the BacScience Universal BAC Water Calculator for single-compound concentration mathematics. For multi-component blends, enter and calculate each ingredient separately rather than treating the blend's total mass as one compound.
Human pharmacodynamic research exists, particularly for the long-acting DAC-associated form. Evidence is limited and does not establish clinical efficacy for the marketed uses commonly associated with peptide stacks.
COMPONENT
Ipamorelin
Human PK/PD research exists, with additional clinical investigation in postoperative ileus. These studies do not validate the CJC-1295 + ipamorelin combination.
COMBINATION
CJC-1295 + Ipamorelin
No controlled human combination trial was identified in the reviewed literature. Therefore combination efficacy and combination-specific safety remain unestablished.
Regulatory & Safety Considerations
CJC-1295 + ipamorelin is not an FDA-approved combination product. FDA materials have discussed CJC-1295 and ipamorelin in the context of compounding and safety evaluation, including concerns about peptide characterization, impurities and limited clinical information.
CJC-1295: FDA has identified limited clinical data and safety concerns associated with CJC-1295, including reports involving increased heart rate and systemic vasodilatory reactions in its compounding review materials.
Ipamorelin acetate: FDA has noted potential immunogenicity concerns related to aggregation and peptide-related impurities. FDA materials also discuss serious adverse events reported in a study involving intravenous administration for gastrointestinal motility.
These regulatory observations are not evidence that every research material will produce the same outcome, but they are important reasons to avoid presenting an unapproved peptide blend as though it were a validated pharmaceutical therapy.
Research-use information only. This page is not medical advice and does not recommend administration, dosing, treatment, or use of these compounds in humans or animals.
Research Limitations
1. Combination evidence gap
The most important limitation is the absence of a controlled human trial evaluating the named combination itself.
2. CJC-1295 identity gap
DAC and no-DAC terminology matters. Results from one molecular configuration should not automatically be transferred to another.
3. Formulation variability
Marketed and compounded formulations may use different component ratios. A vial labelled “10 mg blend” is insufficient to determine the individual concentrations without the per-component specification.
4. Endpoint limitations
Human studies of the individual compounds have generally focused on pharmacology, hormone concentrations, pharmacokinetics, or specific clinical research questions—not proof of broad performance, recovery, anti-aging, or body-composition claims.
Frequently Asked Questions
What is CJC-1295 + Ipamorelin?
It is a two-peptide combination containing CJC-1295 and ipamorelin. It is commonly encountered as a research blend, but the name does not establish a universally standardized formulation.
Is CJC-1295 + Ipamorelin clinically proven?
No controlled human clinical trial of the specific combination was identified in the reviewed evidence. Individual studies of the two components cannot be treated as combination evidence.
What is a common CJC-1295 + Ipamorelin formulation?
A commonly encountered research configuration is 5 mg CJC-1295 plus 5 mg ipamorelin, for 10 mg total peptide. However, this is not a universal standard. Regulatory records also document other ratios and concentrations.
Does a 10 mg CJC-1295 + Ipamorelin vial mean 10 mg of each peptide?
No. “10 mg blend” can refer to total peptide mass. The actual CJC-1295 and ipamorelin quantities must be read from the formulation label or certificate of analysis.
How do I calculate concentration for a 5 mg + 5 mg blend?
Divide 5 mg of CJC-1295 by the final liquid volume to obtain CJC-1295 concentration. Separately divide 5 mg of ipamorelin by the same final liquid volume to obtain ipamorelin concentration.
Does adding more BAC water change the amount of peptide in the vial?
No. In the simple concentration model, changing the liquid volume changes concentration but does not change the mass of peptide originally present.
Is CJC-1295 with DAC the same as CJC-1295 without DAC?
They should not be treated as interchangeable research materials. The DAC-associated form has substantially different pharmacokinetic characteristics, and the principal published human CJC-1295 study used the long-acting DAC-associated analogue.
Can evidence for CJC-1295 and ipamorelin separately prove that the combination works?
No. Combination efficacy and safety require combination-specific research. Separate component evidence can provide mechanistic context but cannot substitute for a controlled study of the pair.
Is the CJC-1295 + Ipamorelin combination FDA approved?
No FDA-approved combination product containing CJC-1295 and ipamorelin has been established by the evidence reviewed for this page.
Where can I calculate another BAC-water concentration?
The BacScience Universal BAC Water Calculator is available at BacScience BAC Water Calculator . For multi-component blends, calculate every ingredient separately.
Scientific References
Teichman SL, et al. Prolonged 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. Journal of Clinical Endocrinology & Metabolism. PubMed PMID 16352683 .
Pharmacokinetic-pharmacodynamic modeling of ipamorelin, a growth hormone releasing peptide, in human volunteers. PubMed PMID 10496658 .
U.S. Food & Drug Administration. Certain Bulk Drug Substances for Use in Compounding that May Present Significant Safety Risks. Includes FDA discussion of CJC-1295 and ipamorelin acetate. FDA .
U.S. Food & Drug Administration. December 4, 2024 Pharmacy Compounding Advisory Committee materials: CJC-1295-related bulk drug substances. Includes discussion of different CJC-1295 forms and documented compounded multi-ingredient concentrations. FDA briefing document .
U.S. Food & Drug Administration. FDA PCAC briefing materials on CJC-1295-related bulk drug substances. FDA .
U.S. FDA Substance Registration System. CJC-1295 substance record. FDA GSRS .
U.S. FDA Substance Registration System. Ipamorelin substance record. FDA GSRS .
Link to BacScience's educational article explaining bacteriostatic water, sterile handling concepts, and concentration mathematics.
Related Peptide Research
Link separately to dedicated CJC-1295 and ipamorelin research pages. Keep component evidence separate from the combination page.
Last reviewed: September 11, 2026 Evidence and regulatory status can change. Review source documents and formulation specifications before updating this page.
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