I just did oil pulling this morning for the first time, coconut oil for 20 minutes. Felt great! I am now (evening) experiencing serious metallic taste in my mouth though. I started OP because I just had 2 root canals and 2 crowns. I'm now starting to get some pain in the evenings in the tooth of one of the root canals and now read how terrible root canals are. :( but I thought OP might help until I can get to a holistic dentist and save up to fix this. :( I also have 3 old silver (assume with mercury, they're really old) fillings. I'm so excited about the benefits of OP but scared maybe I shouldn't be because of this awful taste and maybe it's the fillings, or crowns?, leaking something even worse in my mouth? Any experience/advice with this? I'm confused by so much information, some conflicting. :(