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IGF-1 Dynamics: Pulsatile vs Sustained

The liver converts GH pulses into sustained IGF-1 secretion — IGF-1 has a longer half-life than GH and acts as the primary mediator of many of GH’s anabolic effects. Sermorelin-driven GH pulses produce hepatic IGF-1 responses that remain within or slightly abo

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  • The liver converts GH pulses into sustained IGF-1 secretion — IGF-1 has a longer half-life than GH and acts as the primary mediator of many of GH’s anabolic effects. Sermorelin-driven GH pulses produce hepatic IGF-1 responses that remain within or slightly above the physiological range for age. rhGH produces IGF-1 elevations that are typically supraphysiological at therapeutic doses — IGF-1 levels above age-matched reference ranges are common in rhGH-treated patients.
  • For research designs studying the physiological GH/IGF-1 axis, sermorelin produces more physiological IGF-1 dynamics. For designs requiring specific supraphysiological IGF-1 levels as an experimental variable, rhGH provides more precise control over the IGF-1 dose.
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