Ipamorelin + CJC-1295: the GH stack, explained

What they are

Ipamorelin is a synthetic pentapeptide and a growth-hormone secretagogue — a GHRP (GH-releasing peptide) that acts as a selective agonist at the ghrelin receptor (GHS-R) on the pituitary, triggering a pulse of GH. It is valued for being more selective than older GHRPs (GHRP-2/6): it stimulates GH with comparatively little effect on cortisol, prolactin or appetite.

CJC-1295 is a synthetic GHRH analog built on the first 29 amino acids of growth-hormone-releasing hormone. Where ipamorelin fires a pulse, CJC-1295 raises the amplitude of GH pulses. That complementary action — a GHRH analog plus a GHRP — is the whole reason the two are run together: together they release more GH than either alone, while keeping the release pulsatile rather than a flat "GH bleed."

The DAC vs no-DAC distinction — get this right

This is the single most-confused point. "CJC-1295" is sold in two genuinely different forms:

The short-acting "no-DAC" version is technically Modified GRF 1-29, frequently mislabeled simply as "CJC-1295." The practical difference is huge: the DAC version produces a multi-day, sustained GH elevation (one reason some prefer the no-DAC form paired with a GHRP — it gives a sharper, more physiologic pulse). Always confirm which one you're actually dealing with.

What the evidence actually shows

The honest version. CJC-1295 (DAC) has real human PK data: a 2006 study (Teichman et al., JCEM) showed a single subcutaneous dose raised mean GH several-fold for ≥6 days and IGF-1 for 9–11 days, and a follow-up confirmed GH secretion stayed pulsatile under continuous stimulation. Ipamorelin advanced to Phase 2 (for post-operative ileus) but failed its endpoints and was not approved.

What does not exist is outcome evidence. There are no published randomized controlled trials showing muscle gain, fat loss, body-composition or anti-aging outcomes for either peptide — and none for the ipamorelin + CJC-1295 combination specifically. Human evidence stops at GH/IGF-1 biomarker responses. The claims circulating online about what the stack "does" are extrapolation from those biomarkers plus anecdote, not demonstrated outcomes.

The math

Both ship (in the research market) as lyophilized powder — sometimes as separate vials, sometimes a pre-blended ipamorelin/CJC vial — so any use involves reconstitution arithmetic, dosed in micrograms. The same arithmetic the peptide reconstitution calculator does for any vial. Worked example, purely as arithmetic:

Concentration is just milligrams divided by millilitres, and units are just hundredths of a millilitre on a U-100 insulin syringe. The reconstitution calculator converts vial size + water + target into exact syringe units (and works in reverse). The micrograms above are illustrative arithmetic, not a recommended dose — community protocols commonly report ~100–300 mcg of each, 1–3× daily, often before bed or fasted, but no validated human dose exists.

Half-lives & why the timing matters

The three half-lives drive completely different schedules: ipamorelin ~2 hours; Mod GRF 1-29 (no-DAC) ~30 minutes; CJC-1295 with DAC ~6–8 days. The no-DAC pairing is deliberately short — ipamorelin + Mod GRF are timed to fire together and mimic a natural GH pulse, which is why they're typically dosed away from food (insulin blunts the pulse). The DAC version instead sits in the blood for days as a sustained elevation. You can see how any half-life and interval accumulate in the half-life visualizer.

Storage & handling

• Lyophilized (powder, unreconstituted): kept frozen for long-term storage; freeze-dried peptide is the most stable form, stored cold and away from light.
• Reconstituted (in bacteriostatic water): refrigerated at 2–8°C (36–46°F), not frozen — freeze/thaw cycles can damage peptide bonds. Reconstituted peptide is commonly used within about four weeks.
• Reconstitution technique: swab the stopper, add water slowly down the vial wall, swirl gently rather than shake.
• Quality honesty: in the "research chemical" supply chain, identity, purity and sterility are unregulated — mislabeling (especially DAC vs no-DAC), under/over-dosing and contaminants are documented concerns.

Tracking the stack in OptiPin

If you are tracking a GH-peptide protocol, OptiPin treats each compound as its own entry — without endorsing it:

• Two compounds, separate logs — ipamorelin and CJC-1295 each get their own schedule, dose log and vial inventory, even when drawn together.
• Reminders + timing — record each injection (e.g. a pre-bed, fasted dose) and get reminded on the due day, with site rotation.
• IGF-1 & glucose tracking — log bloodwork (IGF-1, fasting glucose/HbA1c) over your dose timeline — the sensible self-check given the insulin-sensitivity angle.
• OptiInsight analysis — OptiPin's AI reads the full record (doses, labs, symptoms) and surfaces what moved with what.
• Built-in reconstitution math — the same calculator covered above is in the app, so the microgram-to-unit conversion is one tap.