Every cloud...people who are lactose-intolerant are less likely to suffer from lung, breast and ovarian cancers, which suggests that milk and other dairy products may have some connection to cancer.
People who are lactose-intolerant-lactose is the sugar found in milk and other dairy produce-seem to be protected against the cancers compared to people in the general population, and even within their own families.
This suggests that the dairy-free is protecting them, say researchers from Lund University in Sweden, but they don't feel there is enough evidence to state categorically that milk and dairy cause the cancers.
They looked at the health of 22,788 lactose-intolerant people, and discovered their risk of developing lung, breast or ovarian cancers was "significantly lower" than people who didn't have the intolerance, and this was the case irrespective of country or gender.
(Source: British Journal of Cancer, 2014; doi: 10.1038/bjc.2014.544)