Eating too much refined bread and cereal, rather than chocolate and greasy foods, may be the culprit behind the pimples that plague many a youngster.
That is the theory of a team led by Loren Cordain, an evolutionary biologist at Colorado State University in Fort Collins. Highly processed breads and cereals are easily digested. The resulting flood of sugars makes the body produce high levels of insulin and insulin-like growth factor.
This in turn leads to an excess of male hormones. These encourage pores in the skin to ooze large amounts of sebum, the greasy goop that acne-promoting bacteria love.