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Personal Opinion: Having reviewed extensive research on peptides for hair applications, I find GHK-Cu particularly compelling because it addresses hair loss through so many different pathways simultaneously

Do not spray the liquid directly onto the powder puck

Joe Rogan has been using peptides for several years

"Retatrutide, a GIP, GLP-1, and glucagon receptor agonist for obesity: A phase 2 trial." New England Journal of Medicine , 389(6), 514-526

Addressing these deficiencies often improves hair health without peptide therapy

The human airway receives many insults from pathogens, pollen, dust, etc., every day that can contribute to illness, and people who have predispositions to deficiencies in mucus clearance are far more likely to experience an insult that tips their airway from maintaining homeostasis to cycling indefinitely between mucus hypersecretion, dehydration, plugging, and infection