Questions
hair growth peptide: Frequently asked questions
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What if I'm already using finasteride — should I add AHK-Cu or minoxidil?
Add AHK-Cu. Finasteride blocks DHT conversion, which removes the miniaturisation trigger, but it does not actively stimulate regrowth. AHK-Cu's follicle-regeneration mechanism complements finasteride better than minoxidil's vasodilation because the peptide directly counteracts the collagen disorganisation and anagen shortening that DHT caused before you started the 5-alpha reductase inhibitor. If you add minoxidil instead, you're stacking two growth stimulants without addressing the underlying follicle damage. Possible, but less mechanistically targeted.
What if I want to stop minoxidil but keep my regrowth?
Gradually taper minoxidil to once daily while introducing AHK-Cu once nightly for 8–12 weeks, then discontinue minoxidil entirely. Abrupt minoxidil cessation triggers rapid telogen effluvium. Follicles lose the vasodilation stimulus and shed within 60–90 days. AHK-Cu does not prevent this shedding if you stop cold, but the overlap period allows copper peptide signalling to take over before blood flow drops. The South Korean case series mentioned earlier showed 41% maintained density on AHK-Cu alone after minoxidil discontinuation using this taper protocol.
What if I've been using minoxidil for 6 months and see no regrowth?
Switch to AHK-Cu as the primary treatment and consider adding a 5-alpha reductase inhibitor if DHT is the driving factor. Non-response to minoxidil after 6 months suggests the follicles are receiving adequate blood flow but lack the cellular signalling to enter anagen. Exactly the pathway AHK-Cu targets. Some dermatologists recommend a 2-month washout before starting the peptide to establish a clean baseline, but simultaneous use is also safe if you want to avoid shedding during the transition.
What If I'm Using Sermorelin But See No Hair Changes After 6 Months?
Recheck your IGF-1 level at 8–12 weeks post-initiation—if it hasn't increased by at least 50 ng/mL, your pituitary isn't responding to the peptide. Non-response occurs in roughly 20% of GH-deficient patients due to GHRH receptor downregulation or pituitary adenomas that impair somatotroph function. If IGF-1 has normalized but hair density hasn't improved, the hair loss driver is likely androgenic rather than metabolic, and you should transition to finasteride or minoxidil instead of extending sermorelin beyond 12 months.
What If I Accidentally Left Reconstituted Sermorelin Out of the Fridge Overnight?
Discard it—peptides exposed to temperatures above 8°C for more than 2 hours undergo irreversible aggregation. The denatured peptide won't cause harm if injected, but it provides zero GH-stimulating activity. There's no visual or potency test you can perform at home to verify degradation, so the safe protocol is to discard and reconstitute a fresh vial. Attempting to salvage temperature-compromised peptide is the single most common reason patients report 'sermorelin stopped working' mid-protocol.
What If My IGF-1 Levels Are Borderline (100–150 ng/mL)—Should I Try Sermorelin?
Request a GH stimulation test before starting sermorelin—borderline IGF-1 doesn't confirm deficiency. The test involves administering arginine or glucagon intravenously and measuring GH response over 2 hours; peak GH below 5 ng/mL confirms true deficiency. Starting sermorelin without functional confirmation means you're treating a condition you may not have, which wastes both time and money on a 12-month protocol that won't produce follicle changes if your GH secretion is already adequate.