Dr. Weston Price, a renowned dental research specialist, observed many patients with crippling degenerative diseases who did not respond to treatment.
He suspected infected root canal teeth to be the culprit. He developed a testing method that revealed the presence of infection in a tooth. By implanting a root filled tooth from a patient under the skin of a laboratory animal, usually a rabbit, he found that in almost every case the animal would develop the same disease as the patient, lose weight, and often times would die.