The trial of a Calgary woman has heard that her seven-year-old son, whom she treated with dandelion tea and oil of oregano, died from "overwhelming sepsis."

Tamara Lovett, who is 47, is charged with failing to provide the necessaries of life and with criminal negligence causing the death of her son.

Experts say the trial of a woman who turned to holistic medicine before the death of her seven-year-old son is likely to reignite a debate over the use of natural and alternative treatments.