Repeated use of products containing lavender oil or tea tree oil may spur breast growth in prepubertal boys, experts report in The New England Journal of Medicine. The effects fade when boys stop ...

CHICAGO--A new study lends further evidence to a suspected link between abnormal breast growth in young boys--called prepubertal gynecomastia--and regular exposure to lavender or tea tree oil, by ...

Essential oils are a popular, at-home remedy for people looking to improve their health and sleep quality. However, a study determined chemicals in lavender and tea tree oils may cause hormonal ...

A new study from a team at the National Institute of Environmental Health Sciences (NIEHS) is rekindling a debate over the safety of essential oils. The research suggests lavender and tea tree oils ...