The link between cancer and dietary hormones - estrogen in particular -
has been a source of great concern among scientists, said Ganmaa, but it
has not been widely studied or discussed.
The potential for risk is large. Natural estrogens are up to 100,000 times more potent than their environmental counterparts, such as the estrogen-like compounds in pesticides.
- "The milk we drink today is quite unlike the milk our ancestors were drinking" without apparent harm for 2,000 years, she said. "The milk we drink today may not be nature's perfect food."