CJC-1295 (No DAC) + GHRP-2

GHRP-2 as a refinement of the class

The GHRP series began with GHRP-6, a hexapeptide that released growth hormone through a receptor distinct from the GHRH receptor. GHRP-2 followed, incorporating D-amino acids and a 2-naphthylalanine residue that raise potency and stability. In comparative pharmacology it is generally described as releasing more growth hormone per unit mass than GHRP-6 while producing far less appetite stimulation, which is why it displaced the original in study designs where feeding behaviour would be a confound.

Why the combination is studied

• GHRP-2 and the GHRH analogue engage separate receptors expressed on the same pituitary cell.
• GHS-receptor activation suppresses somatostatin tone, which otherwise limits the amplitude of a GHRH response.
• Animal and pituitary-cell studies report a larger measured growth hormone pulse from the pair than from either compound alone.
• Both components are short-acting, so the resulting stimulus is pulsatile rather than sustained — relevant in a feedback-regulated axis.

Interpreting the evidence

Allow the sealed vial to warm to room temperature before opening so condensation does not settle on the cake. Add bacteriostatic water slowly against the inner glass wall and swirl gently until the solution is clear — do not shake or vortex, as agitation shears peptide chains and produces foam that interferes with accurate withdrawal. The hexapeptide dissolves quickly while the 29-residue analogue may take longer; give it time rather than increasing agitation. Note the concentration of each component separately, since the vial holds a fixed 1:1 mixture. Keep unopened vials at −20 °C protected from light, hold reconstituted solution at 2–8 °C, and label all stocks for laboratory research use only.