A new study has suggested that lavender oil and tea tree oil may interfere with normal hormonal activity, predisposing young boys to gynecomastia.
Are Prepubertal Gynaecomastia and Premature Thelarche Linked to
Endocrine-active and endocrine-disrupting compounds in food
Essential oils may disrupt normal hormonal activity
Are Lavender and Tea Tree Essential Oils Hormone Disruptors
Bioidentical hormones: Uses, compound hormones, and risks
Prepubertal Gynecomastia Linked to Lavender and Tea Tree Oils
Essential Oils that Won't Harm Your Thyroid
Essential Oils May Disrupt Normal Hormonal Activity
Endocrine-active and endocrine-disrupting compounds in food