Retina: Light-sensitive tissue lining back of eye containing photoreceptors (rods and cones) converting light into electrical signals
A second family, BPC-157 and TB-500, targets tissue repair rather than the GH axis: BPC-157 is proposed to work through angiogenesis, nitric-oxide signaling, and anti-inflammatory activity, while TB-500 binds actin to promote cell migration, blood-vessel formation, and collagen deposition
Pro-angiogenic signaling leads to endothelial anergy, reduced response to pro-inflammatory signaling and decreased regulation of adhesion molecules and chemokines necessary for capture and trans-endothelial migration of leukocytes [111,112,113,114]
Where a dose sits outside standard ranges (GHK-Cu at 20mg/day in the Benjamin Button Stack is 4x the typical aggressive tier), he still publishes it