When GHK encounters Cu under physiological conditions, the histidine imidazole nitrogen and the N-terminal amine coordinate the metal, with lysine contributing to the binding pocket
What I appreciate the most is how she understands exactly what the skin needs and recommends only whats truly effective
Ferric iron is released with sodium acetate solution (pH 4.8), which is reduced to ferrous iron Fe(II) by sodium ascorbate which then reacts with sodium 3-(2-pyridyl)-5,6-bis(4 phenylsulfonate)-1,2,4-triazine (ferrozine) to form a purple Fe-ferrozine complex that can be read spectrophotometrically (Simpson and Peters 1990)
It depends on various factors such as skin type and condition, skin color, and metabolic rate, among others
The ranges below are indicative only