That therapy is known as chelation therapy. If they go too close to delicate living structures they might react with them and damage them. Hemoglobin, myoglobin, chlorophyll, aspirin, penicillin, etc., are common chelators. Physical life as we know it could not exist without chelation. Chelation used in this way is a process of detoxification .
Nutritional insufficiencies are also a major factor in any chronic illness.
This information is provided for educational purposes. Any medical procedures, dietary changes, or nutritional supplements discussed herein should only be undertaken on the advice of a qualified physician.