According to a study published in the Journal of the American Academy of Dermatology in 2005, there is a connection between milk and severe acne.
Does milk cause acne? For decades scientists have searched for the causes of acne. A study has identified one of the key triggers: milk. Researchers claim to have found a correlation between milk intake and the incidence of acne. Teenagers who drink a pint or more of milk a day are almost 50 per cent more likely to develop spots and pimples than those who rarely or never drink milk.
This supports the results of previous studies, researchers began by asking people to recall what they ate. One such study asked 47,355 women to remember what they ate in high school 9 years prior. Another study asked teenage boys to recall what they ate and to determine the severity of their acne. After analyzing the foods eaten, researchers concluded that girls that consumed three or more servings of milk each day were 22% more likely to suffer from severe acne.