Source comparison
Pulsatile versus sustained signaling
Endogenous GH secretion is pulsatile — sharp bursts separated by troughs, sculpted by the opposing hypothalamic hormones GHRH (stimulatory) and somatostatin (inhibitory). The short-acting no-DAC form, clearing in roughly half an hour, produces a discrete pulse
This comparison does not assign a generated winner or score.
- Endogenous GH secretion is pulsatile — sharp bursts separated by troughs, sculpted by the opposing hypothalamic hormones GHRH (stimulatory) and somatostatin (inhibitory). The short-acting no-DAC form, clearing in roughly half an hour, produces a discrete pulse and then allows the natural trough to return, which more closely resembles physiologic signaling. The DAC form, by contrast, keeps GHRH-R stimulation switched on for days, producing a flatter, more continuous elevation rather than clean pulses. Whether continuous “always-on” GHRH signaling is desirable or not is one of the genuinely open questions in this area, because the natural system is built around pulsatility and negative feedback. The GHRH receptor and its signaling are reviewed in the endocrinology literature.[3] Readers who want plain-language definitions of terms like somatotroph, secretagogue and pulsatility can consult the peptide research glossary.