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The results have been encouraging, from measurable improvements in tissue quality to patients simply feeling better in their skin
Similar concerns apply to phosphodiesterase-5 inhibitors (medications like sildenafil) and L-arginine supplements that also influence nitric oxide signaling
In animal studies, it appears to influence pathways linked to VEGF, a key signal involved in healing [10], [11]
Some clinical studies found that consistent use of GHK-Cu can lead to a 20-30% increase in skin firmness in just 12 weeks
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