I've also been using Mesocopper for 6 months and started in February. I take 2/3 tablespoon each day. After the first month, I noticed that brown spots on my face, hands, and arms were gone. I also noticed the color of Mesocopper changed but the effectiveness seems to be the same for me. My brown spots are still gone. Also, my face is still softer, firmer, and has less wrinkles.
I decided to ask the manufacturer of Mesocopper about the color change. They said they improved the process. The particles are smaller now which gives the lighter color. For topical use, the smaller particles should slightly improve the results. For ingested use there should be no difference.