CJC-1295 no DAC (Mod GRF 1-29) explained: how it differs from DAC versions, research dosing, half-life, stacking, and key safety notes for lab use.
CJC-1295 no DAC, also known as Mod GRF 1-29, is a synthetic growth hormone-releasing hormone (GHRH) analog used in laboratory research on pituitary growth hormone release. It is the same molecule sold under both names: a tetrasubstituted version of GHRH(1-29) with no Drug Affinity Complex attached. CJC-1295 no DAC is not FDA-approved for human use and is distributed as a research chemical only.
What Is CJC-1295 No DAC (Mod GRF 1-29)?
Native GHRH is a 44-amino-acid hormone that signals the pituitary to release growth hormone. The first 29 amino acids, called GHRH(1-29), carry most of that activity, and Mod GRF 1-29 is a chemically modified form of that fragment.
Four substitutions — D-Ala2, Gln8, Ala15, and Leu27 — make the peptide resistant to DPP-IV and other enzymes that would otherwise clear it quickly. Researchers refer to the result as tetrasubstituted GRF(1-29), modified GRF(1-29), or CJC-1295 without DAC.
- Sequence length: 29 amino acids
- Molecular weight: roughly 3,368 Da
- Mechanism: GHRH receptor agonist acting on the anterior pituitary
- Reported plasma half-life: about 30 minutes
Because the amino acid sequence is identical to the "no DAC" form of CJC-1295, the two names describe one peptide. Suppliers often label the vial cjc-1295 no dac peptide to separate it from the longer-acting DAC version.
Mod GRF 1-29 vs CJC-1295 DAC: Key Differences
Most comparisons of mod grf 1-29 vs cjc 1295 dac focus on duration of action rather than receptor target, because both compounds bind the same receptor. The DAC version carries a maleimidopropionic acid linker that attaches to serum albumin, which dramatically extends circulation time.
| Feature | CJC-1295 No DAC (Mod GRF 1-29) | CJC-1295 With DAC |
|---|---|---|
| Structure | Modified GHRH(1-29), no albumin-binding linker | Modified GHRH(1-29) plus Drug Affinity Complex |
| Reported half-life | ~30 minutes | ~6 to 8 days |
| Molecular weight | ~3,368 Da | ~3,647 Da |
| Release pattern in studies | Short pulse, closer to natural GH rhythm | Continuous elevation over days |
| Typical research frequency | Multiple times per day | Once weekly or less |
| FDA approval | None for human use | None for human use |
The practical takeaway is that CJC-1295 with DAC produces sustained exposure, while the no DAC form produces a brief pulse. That difference matters more than the shared name suggests.
Why the Half-Life Matters
Growth hormone is normally released in pulses, especially during deep sleep and after exercise. A compound that keeps GH elevated around the clock creates a very different physiological picture than one that produces short bursts.
The cjc 1295 no dac half-life is reported at roughly 30 minutes in plasma, compared with only a few minutes for unmodified GHRH(1-29). The four substitutions extend the peptide's survival, but they do not turn it into a long-acting depot.
Researchers studying pulsatile GH secretion therefore tend to favor the no DAC form, while studies focused on sustained exposure use the DAC version. Neither compound is approved for human use in the United States.
Dosing and Reconstitution in Research Settings
No established cjc-1295 no dac dosage exists for human use, and published animal and in vitro studies use a wide range of amounts. Numbers circulating on forums should be treated as anecdotal rather than clinical guidance.
The peptide normally arrives as a lyophilized powder that is reconstituted with bacteriostatic water or a comparable diluent. Standard lab practice includes:
- Refrigerating the reconstituted solution and avoiding repeated freeze-thaw cycles
- Protecting the dry powder from light and moisture before reconstitution
- Using sterile technique, appropriate personal protective equipment, and proper disposal
- Verifying purity and identity documentation from the supplier before use
Vials are most often offered in 2 mg and 5 mg sizes, which is why searches for cjc-1295 no dac 2mg mod grf 1-29 and cjc 1295 no dac 5mg mod grf 1 29 generally return the same peptide in different quantities.
Stacking With Ipamorelin and Other Peptides
GHRH analogs are sometimes studied alongside ghrelin receptor agonists such as ipamorelin, because the two act through different receptors on the same pituitary cells. Preclinical work suggests the combination can produce additive growth hormone release compared with either compound alone.
A large share of forum traffic, including cjc-1295 no dac ipamorelin reddit threads, describes self-administered stacking protocols. Those reports are not clinical evidence, and they carry the same purity and dosing uncertainties as any unapproved research chemical.
A related GHRH analog, sermorelin, has limited FDA approval for specific diagnostic testing, but that approval does not extend to CJC-1295 or Mod GRF 1-29.
Safety, Legal Status, and Realistic Expectations
CJC-1295 no DAC is not FDA-approved for human use in the United States, and it is not a lawful dietary supplement ingredient. Products labeled for laboratory research only are not intended for human consumption.
Human safety data for Mod GRF 1-29 is essentially absent. Reports involving GHRH-related compounds generally mention injection-site reactions, fluid retention, and shifts in blood sugar, but these come from related drugs rather than controlled trials of this specific peptide.
Anyone weighing a GHRH-related peptide for a health concern should speak with a licensed healthcare professional instead of relying on vendor marketing or forum posts.
The bottom line is that CJC-1295 no DAC and Mod GRF 1-29 are two names for one short-acting research peptide, and its effects, risks, and legal status are far less established than its online popularity implies.
Frequently Asked Questions
Is CJC-1295 no DAC the same as Mod GRF 1-29?
Yes. Both names refer to the same tetrasubstituted GHRH(1-29) analog with four amino acid substitutions and no Drug Affinity Complex. Suppliers use "CJC-1295 no DAC" and "Mod GRF 1-29" interchangeably on labels, and the amino acid sequence is identical.
How long does CJC-1295 no DAC stay active?
The reported plasma half-life is roughly 30 minutes, which is much shorter than the 6 to 8 days reported for CJC-1295 with DAC. It still lasts considerably longer than unmodified GHRH(1-29), which enzymes degrade within minutes. That short window is why research protocols using the no DAC form often involve more frequent administration.
Is CJC-1295 no DAC legal to buy in the United States?
CJC-1295 no DAC is not FDA-approved for human use and is not a legal dietary supplement ingredient. It is sold by research chemical suppliers labeled for laboratory use only, and importing or possessing it for personal human use may fall outside federal rules. State laws vary, so check local regulations and consult a qualified professional.
This page provides educational research information and does not replace medical advice, diagnosis, or treatment.