I am curious. Is your homocystein level elevated? Are you anemic? Are your iron and copper levels normal? Mercury tends to cause derangement in the body's ability to process necessary minerals. Are you taking a vitamin D supplement? Are you taking herbs that help with detoxification, such as tumeric, garlic, licorice root, dandelion, etc.? Have you done parasite cleanses? One important thing when chelating is to make sure that you don't become constipated, as much of the mercury is excreted through the bowel via the bile.