Individual factors requiring dose personalization include age (older patients often need higher doses due to reduced pituitary sensitivity), baseline IGF-1 levels (lower baseline suggests higher doses needed for optimal elevation), body composition (obesity impairs growth hormone dynamics requiring dose adjustment), treatment goals (aggressive optimization versus maintenance dosing), and medication quality (pharmaceutical-grade versus variable-purity research peptides affecting bioavailability)
In addition, obesity and higher glucose levels are risk factors for cognitive impairment, and maintaining a healthy lifestyle is recommended to prevent or delay dementia
Pharmacies can only compound peptides that are FDA-approved, Generally Recognized as Safe (GRAS), have a USP monograph, or appear on the FDAs Category 1 bulk drug substances list (think NAD+ or sermorelin)
Diabetes Care (1996) 19:5806
10.1021/acs.chemrestox.7b00171 114 XiaoW.LoscalzoJ