In January, 2007, the New England Journal of Medicine published a study by Henley et al linking lavender and/or tea tree oil to prepubertal gynecomastia (enlarged breast tissue) in boys. Since that time, several industry experts have presented evidence that lavender and tea tree oils cannot be linked to prepubertal gynecomastia. It is NAHA's position that these oils are safe for use as long as NAHA's Safety Guidelines such as proper dilution are followed.
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