Q: I just read two of your books, first on acne and the second The Green Beauty Guide! I got really interested in your Petite Marie skincare, but there is one thing that made me cautious and it's the colloidal silver as preservative in acne skincare. After seeing those scary photos in Google with those grey faces people had after using colloidal silver orally that I just got scared. Isn't it possible that colloidal silver just builds up in our body later creating this grey face effect? Read more of this post