I recently had a colonoscopy and the doctor said I have Melanosis but it's nothing to worry about. I asked him what causes that and he said overuse of laxatives. I told him that I only take Miralax, but he said Miralax doesn't cause this. What else can cause Melanosis? I take quite a few supplements: Daily multiple vitamin, Vit D3, Resveratrol, CoQ10, Lutein & Zeaxanthin, Saffron, Fish oil. Could one of those be the cause?