I didn't use any thing on my first visit when i had 3 amalgams removed and felt like crap for almost 3 weeks after wards ,then on my next visit I pulled apart the capsules of 4 charcoal capsules and poured the powdered charcoal into a half cup of water and rinsed my mouth with the charcoal and water mixture just before the dentist started his work to remove 6 amalgams filling ,and It made a big difference ,I only felt bad for about 3 days afterwards , I also took 2 capsules daily for a short time after the work was done to mop up any mercury that may have got past the suction during the removal