A new study from the National Institute of Environmental Health Sciences lends new evidence to a suspected link between regular exposure to lavender oil or tea tree oil and prepubertal gynecomastia (abnormal breast growth in young boys). Ramsey et al identified eight components of lavender and tea tree oils as endocrine disruptor chemicals. Image credit: Ilona Couleur. Lavender and tea tree oils are among the so-called essential oils that have become...