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An 8-week randomized double-blind clinical trial comparing GHK-Cu in nano-lipid carrier to Matrixyl 3000 showed 55.8% reduction in wrinkle volume versus control serum and 31.6% reduction versus Matrixyl 3000, with 32.8% reduction in wrinkle depth versus control

Skin firmness around the abdomen, thighs, and arms shows measurable improvement in most researchers

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Proper nasal technique proves absolutely critical - head tilted slightly forward (not back), gentle breathing (not hard sniffing), alternating nostrils with 1-2 minute intervals, and avoiding immediate swallowing determines success versus complete failure