It is also dangeous or your health:
'In 2006, a researcher from the Harvard School of Public Health found a strong link between dairy consumption and hormone-dependent cancers – testes, breast, and prostate. Scientist/physician Ganmaa Davaasambuu believes that the naturally occurring hormones in a pregnant cow’s milk increase the risks for these types of cancer. Milk from cows contains “considerable amounts of female sex hormones,” accounting for 60-80% of estrogens consumed by humans. Although the research focused on dairy, Ganmaa’s findings implicated a variety of animal products, as well as dairy:
Butter, meat, eggs, milk, and cheese are implicated in higher rates of hormone-dependent cancers in general, she said. Breast cancer has been linked particularly to consumption of milk and cheese.'