didn't work well for me being irish descent.
loads of freckles, and became extremely sensitive to sunlight, creating more and more freckles very fast that remained years after stopping. even have a freckle on my lip still...
my advise, is forget what you read about dosage online, and do your own protocol, start very small (def do not LOAD at the beginning!) and calibrate it to YOU and YOUR skin.
this cannot be stressed enough.
edit: also, melanotan is not just "skin pigment" like advertised, its very very non selective. it changes many parts of the body including hair colour, my ginger beard went black, head hair colour darkened and is still changed years later.
its not what is advertised.