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GHK-Cu supports the production of proteins and lipids that reinforce the barrier, reduce transepidermal water loss (TEWL), and promote smoother, more hydrated skin

Reduce the sweep count per zone by 1 to 2 below the face protocol, extend the interval between treatments to three weeks for these areas, and pay particular attention to sun protection

It upregulates matrix metalloproteinases (MMPs), which are enzymes that break down old, damaged collagen and extracellular matrix components

These systemic effects are uncommon and typically mild

Prolonged esophagitis after primary dysfunction of the pyloric sphincter in the rat and therapeutic potential of the gastric pentadecapeptide BPC 157

By age 60, circulating GHK drops to roughly 80 ng/mL