REAL SCIENCE. REAL POSSIBILITIES.
GROWTH-HORMONE-RELEASING RESEARCH

CJC-1295

CJC-1295 encourages the body to release more growth hormone, which explains the interest around recovery, sleep and body composition.

Growth hormoneIGF-1Body composition
Early human evidenceHuman pharmacology studies demonstrate effects on GH and IGF-1, but evidence for broader performance, recovery or body-composition outcomes is much less developed.
WHY PEOPLE ARE INTERESTED

Why are people interested in CJC-1295?

CJC-1295 is mainly talked about for recovery, muscle and body composition, sleep and the possibility of increasing the body's own growth-hormone output.

Start with the big picture

These cards show what CJC-1295 is best known for and where the interest comes from. When you want the detail, open Research for the studies or Evidence for a quick view of how strong the support is.

AT A GLANCECJC-1295
Growth hormoneIGF-1Body composition

The main reasons this compound attracts attention. The Research and Evidence sections give you the deeper scientific picture.

Growth hormone & IGF-1

The clearest demonstrated effect of CJC-1295 is that it can raise growth hormone and IGF-1, two hormones closely linked with growth, recovery and body composition.

WHAT THE RESEARCH SAYS

Early human studies showed measurable increases in circulating growth hormone and IGF-1 after administration.

Evidence so farEarly human pharmacology evidence

Recovery

Recovery and tissue repair are among the most common reasons people become interested in CJC-1295.

WHAT THE RESEARCH SAYS

There is a reasonable biological basis for this interest because of the growth-hormone response, but strong trials showing faster recovery with CJC-1295 itself are lacking.

Evidence so farMechanistic rationale

Muscle & body composition

Building or preserving lean mass while reducing body fat is another major part of the conversation around CJC-1295.

WHAT THE RESEARCH SAYS

Despite the interest, controlled studies have not yet established a meaningful body-composition benefit from CJC-1295 itself.

Evidence so farInsufficient outcome evidence

Sleep & wellbeing

Better sleep and a general improvement in wellbeing are also commonly reported reasons for interest.

WHAT THE RESEARCH SAYS

These effects have not been established as reliable clinical benefits in the available human research.

Evidence so farCommunity interest · limited evidence
Interest first. Evidence next.We start with why people are talking about CJC-1295, then show what the research actually supports so you can see the full picture.
WHAT RESEARCH IS EXPLORING

CJC-1295: the main research themes

CJC-1295 is mainly talked about for recovery, muscle and body composition, sleep and the possibility of increasing the body's own growth-hormone output.

01
Growth hormone & IGF-1

Early human studies showed measurable increases in circulating growth hormone and IGF-1 after administration.

02
Recovery

There is a reasonable biological basis for this interest because of the growth-hormone response, but strong trials showing faster recovery with CJC-1295 itself are lacking.

03
Muscle & body composition

Despite the interest, controlled studies have not yet established a meaningful body-composition benefit from CJC-1295 itself.

04
Sleep & wellbeing

These effects have not been established as reliable clinical benefits in the available human research.

RESEARCH LANDSCAPEGrowth hormone · IGF-1 · Body composition
Growth hormoneIGF-1Body compositionRecovery research
Studies & trials

Studies & trials

Original publication · PubMed · trial registry where available
2006 · Randomized placebo-controlled double-blind ascending-dose trials

Prolonged stimulation of growth hormone and IGF-I secretion by CJC-1295 in healthy adults

Healthy adults aged 21–61 years

SubcutaneousSingle dose, then weekly or biweekly dosing in the multiple-dose study28 and 49 days
A single injection produced dose-dependent increases in mean growth-hormone concentrations for 6 days or more and IGF-I concentrations for 9–11 days.
The estimated CJC-1295 half-life was 5.8–8.1 days; no serious adverse reactions were reported in these short studies.
Evidence snapshot

Evidence snapshot

Separate dimensions, not one overall score
Human evidenceLimited
2/5 evidence depth
Clinical efficacyLimited
2/5 evidence depth

This score reflects completed human outcome evidence. A registered or recruiting trial does not count until results are reported.

Safety evidenceLimited
2/5 evidence depth
Preclinical evidenceDeveloping
3/5 evidence depth
HOW TO READ THESE SCORESDeveloping preclinical evidence · limited human evidence

These are editorial evidence-depth ratings on a 1–5 scale, not a statistical result or a single scientific formula. They summarise how much relevant evidence is present in each separate category and how mature that evidence is.

Human evidenceHow much direct research in people is available and how developed it is.
Clinical efficacyWhether human studies demonstrate meaningful outcomes for the claims being discussed.
Safety evidenceHow much human safety, tolerability and longer-term follow-up information is available.
Preclinical evidenceThe depth of laboratory and animal research supporting biological plausibility.
HOW THE EVIDENCE IS ORGANISED

CJC-1295 research profile

Research themes are shown separately from the strength of the human evidence so biological interest is not confused with proven clinical benefit.

RESEARCH AREA 01Growth hormone
RESEARCH AREA 02IGF-1
RESEARCH AREA 03Body composition
RESEARCH AREA 04Recovery research
Mechanistic and preclinical findings are context for further research; they are not treated as equivalent to demonstrated human outcomes.
From promising signals to human evidencePreclinical research can reveal promising biological signals. Human studies show how far those signals have translated into real-world outcomes.
What people are exploring
PEOPLE & EXPERIENCE

What people are exploring

Recurring themes from peptide and wellness communities, shown alongside what published research currently suggests.

Experience + research context
Why this matters

CJC-1295 is explored around recovery, sleep and body composition because human studies show that it can raise growth hormone and IGF-1. The key practical issue is product identity: DAC-linked CJC-1295 and shorter-acting ‘no DAC’ products should not share one dosing conversation.

WHAT PEOPLE REPORTReal-world interest

Experiences can reveal recurring goals, perceived changes and practical questions that formal studies may not yet address. They can suggest what deserves investigation, but cannot isolate the effect of one compound from rehabilitation, time or other changes.

+
WHAT RESEARCH ADDSScientific context

Human and preclinical research helps test whether an idea is biologically plausible, whether it appears in people and how confidently the result can be separated from chance, bias or other parts of recovery.

Very frequently discussedPositive

Higher GH and IGF-1

HUMAN RESEARCH

Short randomized studies in healthy adults showed prolonged, dose-related increases in GH and IGF-1.

PRECLINICAL RESEARCH

The compound was designed to extend GHRH-like signalling through drug-affinity-complex technology.

WHERE IT STANDS TODAY

A demonstrated pharmacology effect; it is not the same as proven recovery or body-composition benefit.

Frequently discussedMostly positive

Sleep and recovery

HUMAN RESEARCH

The early human programme measured hormones and pharmacokinetics rather than sleep quality, injury recovery or training outcomes.

PRECLINICAL RESEARCH

Growth-hormone physiology offers a rationale, but the outcome still needs direct testing.

WHERE IT STANDS TODAY

Plausible, popular and not yet established as a reliable clinical benefit.

Commonly discussedMixed

Pairing with Ipamorelin

HUMAN RESEARCH

The available human studies examined the compounds separately, not as a validated combined protocol.

PRECLINICAL RESEARCH

GHRH and ghrelin-receptor pathways can produce complementary GH signals, but combination safety and outcomes remain uncertain.

WHERE IT STANDS TODAY

A community rationale without direct human combination evidence.

Experience can start the question. Research has to test it.

Community reports can surface patterns worth exploring. Controlled human research is what tests whether those patterns are reliable, clinically meaningful and attributable toCJC-1295, while the available studies show how far that question has already been answered.

Dose & duration
DOSE & DURATION

See the numbers in their proper context

Compare published study protocols with the patterns people discuss in the community. The two are intentionally kept separate so an anecdotal routine is never mistaken for clinical guidance.

Research protocols · community patterns · calculator tools
Research dose ≠ recommendation. A dose used in a study describes that study only and does not establish an appropriate dose for an individual outside the research setting.
CALCULATOR TOOLS

Work with the numbers

Convert amounts, concentration, liquid volume and vial requirements. These tools do the arithmetic; they do not select a dose.

Early randomized human studies used weight-based subcutaneous dosing to study pharmacokinetics and GH/IGF-I responses; these protocols are research doses, not a general treatment schedule.

PUBLISHED HUMAN RESEARCH

Healthy-adult randomized ascending-dose studies

Healthy adults aged 21–61

View source ↗
01 · START / INITIAL30–60 μg/kg among studied dose levels
02 · END / TARGETAscending single and repeat dose cohorts
03 · STUDY WINDOW28–49 days

Published study structure, shown as data — not a personal dosing schedule.

Start / initial30–60 μg/kg among studied dose levels
End / targetAscending single and repeat dose cohorts
FrequencySingle dose, then weekly or biweekly in repeat-dose cohorts
RouteSubcutaneous
Study duration28–49 days
Study sourcePMID 16352683

Pharmacokinetic/pharmacodynamic research protocol; not a recommendation.

HOW TO READ THE STEP-UPThe start and target come from the published protocol.

The visual shows the opening amount, target amount and total study window. It does not invent intermediate steps: the linked paper or authorised product information remains the source for the complete escalation schedule.

COMMUNITY DISCUSSION

What people commonly discuss

Anecdotal · confirm DAC status before interpreting any number
STARTING APPROACHES

For DAC-linked CJC-1295, community protocols often begin around 1 mg once weekly. This is anecdotal and is not the same product or schedule as ‘CJC-1295 without DAC’ / modified GRF 1-29.

DURATION / CYCLES

Eight-to-twelve-week cycles are commonly discussed, with dose and frequency varying sharply according to whether DAC is present.

MAINTENANCE DISCUSSION

Some discussions use 1–2 mg weekly before a pause. No evidence-based maintenance dose, cycle length or break interval has been established.

Community patterns are anecdotal and unvalidated unless a linked human study independently supports the same approach.
COMMUNITY-REPORTED PRACTICEInjection patterns people commonly discussPopular uses · route · site discussion · timing · duration
Common anecdotal consensus
RecoverySleep and wellbeingBody-composition goalsGrowth-hormone-related interest
ROUTE PEOPLE DISCUSS

Subcutaneous injection is the route most frequently discussed in community use.

INJECTION-SITE DISCUSSION

Abdominal or other routine subcutaneous sites are commonly discussed. Site selection is generally treated as a practical injection choice rather than a way to target a specific tissue.

TIMING PEOPLE DISCUSS

Evening or bedtime use, and use away from meals, are commonly discussed because of interest in growth-hormone pulses. These practices are not validated as superior clinical strategies.

DURATION / CYCLE DISCUSSION

Users often discuss multi-week or multi-month cycles, frequently alongside Ipamorelin, but there is no established community schedule that can be treated as clinical guidance.

What the evidence supports

CJC-1295 has some human pharmacology data, but popular recovery, sleep and body-composition protocols go beyond what those studies establish.

Community reports describe what people say they do; they are not instructions, validated protocols, or evidence that a particular injection site or timing improves outcomes.
Safety context
SAFETY & UNCERTAINTY

Longer GH and IGF-1 exposure is the benefit story and the safety question

What the current evidence saysShort studies provide limited tolerability information. Fluid retention, headache, injection reactions, altered glucose handling and consequences of sustained IGF-1 elevation need consideration, while long-term outcome data are lacking.
01 · OBSERVEDPublished safety findings

The summary above reflects the human or preclinical evidence currently represented on this profile.

02 · UNCERTAINGaps still matter

Limited follow-up, small studies or absent controlled trials can leave uncommon and longer-term risks unresolved.

03 · CONTEXTProduct and regulatory status

Route, product identity, quality and regulatory status can materially change the safety context; see the linked status sources below.

Why this matters

The label ‘CJC-1295’ is used inconsistently in the market. DAC-linked and non-DAC products differ materially in duration and should not be treated as interchangeable.

Sources & current status
READ FURTHER

Sources & current status

Follow the professional sources used across this profile, then see how the compound is currently described in regulatory and research terms.

CURRENT STATUS

How to interpret its position today

Evidence status

Experimental human pharmacology

Human studies established prolonged GH and IGF-1 responses, but not an authorised recovery, anti-ageing or body-composition indication.

CJC-1295 study · PubMed
Product identity

DAC status must be explicit

Shorter-acting modified GRF products are often called ‘CJC-1295 without DAC’ in community use, but they are not pharmacokinetically equivalent to the DAC-linked compound studied in the cited trial.

Original pharmacology paper · DOI

Profile reviewed against its linked source record on 20 September 2026. See how evidence is assessed.

RELATED RESEARCH AREAS
Energy & Performance Hormonal Health