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Efficacy of melatonin as a sleep-promoting agent
Common (typically mild and transient): Increased appetite (moderate, less than GHRP-6) Flushing and warmth at the injection site or face Transient drowsiness or sleepiness, particularly with evening doses Mild water retention and peripheral edema Increased gastrointestinal motility Less Common: Elevations in cortisol and ACTH (moderate, comparable to hCRH) Mild prolactin elevation (less than TRH-induced levels) Numbness or tingling in extremities Joint stiffness Lightheadedness post-injection Rare or Theoretical Concerns: Impaired glucose metabolism and elevated blood glucose with prolonged use Potential tachyphylaxis (reduced response) with continuous daily dosing Theoretical promotion of existing malignancies through elevated GH/IGF-1 (applies to all GH-elevating compounds) Side effect incidence tends to be lower than with exogenous hGH because GHRP-2 stimulates endogenous GH synthesis within physiological regulatory limits
Unfortunately, such vitamin B12 injection dosage and frequency advice is common
Vargas-Santos, A
Long-acting agents, on the other hand, provide continuous receptor activation due to structural modifications that slow their absorption, reduce the rate of renal clearance or extend their half-lives [52, 53]
Oral bioavailability is significantly lower than injection, requiring much higher doses to achieve comparable GH release
