In this excerpt, Sat Dharam Kaur ND discusses the role of hormones in contributing to breast cancer, and explains hormone-receptor interactions. She discusses the role of light and dark cycles on melatonin and the menstrual cycle. This segment was part of a workshop presented at the Canadian College of Naturopathic Medicine in 2007. The complete 2 1/2 hour lecture on hormonal links to breast cancer can be ordered online.

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