Also indexed as:Lavandula officinalis, Lavender Oil, Silexan
© Steven Foster
Internal use of the volatile oil can cause severe nausea. Very small amounts should be used only under the supervision of a healthcare professional. Excessive intake (several times more than the recommended amount) may cause drowsiness.18 External use in reasonable amounts is safe during pregnancy and breast-feeding.
In case reports, three young boys developed breast enlargement (gynecomastia) after repeated topical application of products that contained lavender oil and tea tree oil. The problem resolved after they stopped using the oils. While a cause–effect relationship was not conclusively proven, it was suggested by the fact that these oils have been found to have estrogen-like effects in test tube studies.19
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