Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| CJC-1295 (with DAC) | Semax | |
|---|---|---|
| Category | Peptides | Peptides |
| Standard Dose | Research indicates 2 mg administered once weekly via subcutaneous injection. | Research indicates 200-600 mcg daily via intranasal administration (0.1% solution, 2-3 drops per nostril). |
| Timing | Evening administration preferred (aligns with natural GH pulsatility). Inject on an empty stomach — food (especially carbohydrates) blunts GH release. | Morning and early afternoon dosing (avoid evening — may cause stimulation/insomnia). Intranasal preferred for rapid CNS delivery. |
| Cycle Duration | 12-24 week cycles with 4-8 week breaks between cycles. | 10-14 day cycles with equal rest periods. Some protocols use 3-5 day on / 2 day off patterns. |
| Evidence Level | moderate_human | moderate_human |
CJC-1295 with DAC (Drug Affinity Complex) is a synthetic 30-amino acid GHRH analog with four amino acid substitutions rendering it resistant to DPP-IV proteolytic inactivation. The DAC moiety covalently binds to endogenous serum albumin via a disulfide bond after injection, extending half-life to 5.8-8.1 days. It stimulates pulsatile GH release from anterior pituitary somatotrophs through GHRH receptor activation, producing dose-dependent 2-10 fold increases in plasma GH for 6+ days and 1.5-3 fold IGF-1 elevations for 9-11 days per injection.
Research indicates 2 mg administered once weekly via subcutaneous injection.
Evening administration preferred (aligns with natural GH pulsatility). Inject on an empty stomach — food (especially carbohydrates) blunts GH release.
12-24 week cycles with 4-8 week breaks between cycles.
Semax (Met-Glu-His-Phe-Pro-Gly-Pro) is a synthetic heptapeptide analog of the ACTH(4-10) fragment that rapidly upregulates brain-derived neurotrophic factor (BDNF) and its signaling receptor TrkB in the hippocampus (1.4-fold BDNF protein increase, 3-fold exon III BDNF mRNA increase). It activates dopaminergic and serotonergic brain systems, enhances neurotrophin gene expression (BDNF, NGF), and modulates intracellular calcium dynamics in brain neurons. Semax lacks ACTH's corticotropic activity, acting purely as a nootropic/neuroprotective agent.
Research indicates 200-600 mcg daily via intranasal administration (0.1% solution, 2-3 drops per nostril).
Morning and early afternoon dosing (avoid evening — may cause stimulation/insomnia). Intranasal preferred for rapid CNS delivery.
10-14 day cycles with equal rest periods. Some protocols use 3-5 day on / 2 day off patterns.
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