The half-life of CJC-1295 no DAC is roughly 30 minutes, so it clears quickly and needs frequent dosing. Learn how it compares to CJC-1295 DAC.
The half-life of CJC-1295 no DAC is approximately 30 minutes in human plasma, making it a short-acting growth hormone–releasing peptide. Because it clears so quickly, a single injection produces a brief pulse of growth hormone rather than a sustained rise, and research protocols usually call for multiple administrations per day. CJC-1295 no DAC is not FDA-approved for human use and is sold only for laboratory research.
CJC-1295 no DAC is also known as Mod GRF 1-29. Its short duration is the main reason it is compared so often with CJC-1295 DAC, a modified version designed to stay active for days instead of minutes.
What Is CJC-1295 No DAC?
CJC-1295 no DAC is a synthetic analog of growth hormone–releasing hormone (GHRH), specifically a modified GRF(1-29) fragment. Four amino acid substitutions make it more resistant to enzymatic breakdown than native GHRH, which is why it lasts longer than the natural hormone but still only briefly.
The "no DAC" label describes what the molecule does not have: a Drug Affinity Complex. In CJC-1295 DAC, that complex attaches to albumin in the blood and dramatically extends circulation time. Without it, the peptide is cleared through normal metabolic pathways.
In research settings, CJC-1295 no DAC and Mod GRF 1-29 are treated as the same compound. The two names refer to one modified GRF(1-29) sequence, not to separate products.
How Long Is the Half-Life of CJC-1295 No DAC?
Published pharmacokinetic summaries typically place the cjc-1295 no dac half-life at roughly 30 minutes. Growth hormone levels generally peak within 15 to 30 minutes after administration and drift back toward baseline within a few hours.
Estimates vary slightly by study and by population. Reported figures cluster in a narrow range:
- About 30 minutes — the most commonly cited half-life.
- 26 to 30 minutes — range noted in some human studies.
- Under 1 hour — the practical takeaway for anyone planning a dosing schedule.
For comparison, the cjc 1295 dac half life is measured in days. The albumin-binding version is often reported at roughly 6 to 8 days, which is hundreds of times longer than the no-DAC form.
CJC-1295 DAC vs No DAC: Key Differences
The central difference in cjc-1295 dac vs no dac is duration. CJC-1295 DAC stays in the bloodstream for days because of its albumin-binding tail, while CJC-1295 no DAC rises and falls within a short window.
That difference shapes everything else: injection frequency, the shape of the growth hormone pulse, and how researchers design a protocol. The table below summarizes the contrast.
| Feature | CJC-1295 No DAC (Mod GRF 1-29) | CJC-1295 DAC |
|---|---|---|
| Half-life | ~30 minutes | ~6–8 days |
| Albumin binding | No | Yes |
| Typical injection frequency | 2–3 times daily | 1–2 times weekly |
| Growth hormone pattern | Short, pulsatile | Prolonged, elevated |
| FDA approval for human use | None | None |
Why the Short Half-Life Changes Dosing
Because the peptide disappears within minutes, one injection cannot keep growth hormone elevated for long. Typical cjc-1295 no dac dosage protocols in research split the total amount into two or three smaller injections per day.
Common research doses fall between 100 mcg and 200 mcg per injection, but there is no standardized human dose. Any decision about use should involve a licensed healthcare professional.
A short half-life is not automatically a disadvantage. Researchers who want to mimic the body's natural pulsatile GH rhythm may prefer a peptide that clears quickly rather than one that keeps levels elevated for days. Points that matter when designing a protocol include:
- Timing doses around natural GH peaks, such as before sleep or after training.
- Keeping injections small enough to avoid overlap between doses.
- Avoiding food close to administration, since insulin can blunt GH release.
None of these practices are proven to improve health outcomes in humans, and they come from research and anecdotal reports rather than controlled clinical trials.
Reported Benefits of CJC-1295 No DAC in Research
Research on the benefits of cjc 1295 no dac centers on its ability to stimulate the body's own growth hormone release. Studies have looked at IGF-1 levels, body composition, lean mass, and recovery markers, but most evidence comes from animal models or small, short human trials.
No credible evidence shows that CJC-1295 no DAC cures any disease or guarantees fat loss, muscle gain, or anti-aging effects. Claims of that kind are marketing, not science.
Because the peptide acts briefly, any effect depends on repeated stimulation over time. That also means results reported in one study are hard to generalize to different doses, populations, or injection schedules.
Safety, Sourcing, and Legal Status
CJC-1295 no DAC is not approved by the FDA for human use and is not a legal dietary supplement. Products sold online are marketed for laboratory research only, and their purity and identity are not guaranteed.
Reported side effects in research and anecdotal accounts include injection-site irritation, flushing, headache, and possible changes in blood sugar. Long-term safety data in humans are limited, and interactions with other medications are largely unknown.
Anyone with a medical condition, who is pregnant or nursing, or who takes prescription drugs should talk with a healthcare provider before considering any peptide. Self-experimentation with unapproved research chemicals carries real risk.
Bottom Line on the Half-Life of CJC-1295 No DAC
The half-life of CJC-1295 no DAC is about 30 minutes, which makes it a fast-clearing peptide that requires frequent dosing in any research protocol. CJC-1295 DAC lasts roughly 6 to 8 days because of its albumin-binding complex. Neither form is FDA-approved for human use, and both should be handled with appropriate caution and professional guidance.
Frequently Asked Questions
How long does CJC-1295 no DAC stay in your system?
The half-life of CJC-1295 no DAC is about 30 minutes. Growth hormone typically peaks within 15 to 30 minutes and returns near baseline within a few hours, so multiple daily doses are often used in research. CJC-1295 DAC lasts much longer, around 6 to 8 days.
Is CJC-1295 no DAC the same as Mod GRF 1-29?
Yes. CJC-1295 no DAC and Mod GRF 1-29 refer to the same modified GHRH(1-29) peptide with four amino acid substitutions. The "no DAC" label simply distinguishes it from CJC-1295 with the Drug Affinity Complex.
Is CJC-1295 no DAC legal and safe?
CJC-1295 no DAC is not FDA-approved for human use and is sold for laboratory research only. Reported side effects include injection-site irritation, flushing, and headache. Anyone considering it should consult a licensed healthcare professional first.
This page provides educational research information and does not replace medical advice, diagnosis, or treatment.