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Early clinical use suggests minimal side effects, though injectionsite irritation or mild gastrointestinal upset can occur
Clinical oversight helps prevent misuse
Studies demonstrate that Dihexa promotes dendritic spine formation, increases synaptic density, and enhances miniature excitatory postsynaptic currents (mEPSCs), indicating the formation of functional glutamatergic synapses
Because GHK-Cu stimulates the skin's own collagen-producing machinery rather than temporarily plumping the surface, the firmness improvement is structural it's still there months later, not gone the moment a filler effect wears off
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