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[Confidence: Medium] Organ-Specific Targeting: By isolating the hippocampus, the researchers confirmed that GHK-Cu can cross the blood-brain barrier (or bypass it via olfactory tracts) to modulate neuroinflammation and synaptic plasticity, which are critical bottlenecks in age-related cognitive decline

This allows the peptide to absorb without having to fight through a thick layer of cream

doi: 10.3390/toxins8060181 17 ZhuQBerzofskyJA

Intratendinous injections risk further degeneration or rupture

The peptide, in its natural form, promotes angiogenesis, which forms new blood vessels