When I was taking garlic for a parasite infection, I was eating between 1/2 - 1 whole bulb daily.
During this time, an old absessed tooth with a failed root canal that I had had for a long time, (so long it had stopped hurting), was loosened up and was pushed out of my mouth and healed perfectly. Garlic is incredible for infection, but it will really make you smell, and it took a couple of months for this to happen. However, I had a parasite my body needed dealt with first, so it may work alot faster if that is the only infection you are dealing with.