Lavender Products Associated With Premature Thelarche and Prepubertal Gynecomastia: Case Reports and Endocrine-Disrupting Chemical Activities

Author:

Ramsey J Tyler12ORCID,Li Yin1,Arao Yukitomo1,Naidu Ajanta3,Coons Laurel A1,Diaz Alejandro4,Korach Kenneth S1

Affiliation:

1. Reproductive and Developmental Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina

2. Campbell University School of Osteopathic Medicine, Lillington, North Carolina

3. University of California, Irvine Health, Pediatric Endocrinology, Irvine, California

4. Division of Pediatric Endocrinology, Nicklaus Children’s Hospital, Miami, Florida

Abstract

AbstractContextPrevious case reports associated prepubertal gynecomastia with lavender-containing fragrances, but there appear to be no reports of premature thelarche.ObjectiveTo add to a case series about lavender-fragranced product use and breast growth in children and to measure endocrine-disrupting chemical activity of essential oil components.Design, Setting, and PatientsPatients experiencing premature thelarche or prepubertal gynecomastia with continuous exposure to lavender-fragranced products were evaluated in the pediatric endocrinology departments of two institutions. Mechanistic in vitro experiments using eight components of lavender and other essential oils were performed at National Institute of Environmental Health Sciences.Main Outcome MeasuresCase reports and in vitro estrogen and androgen receptor gene expression activities in human cell lines with essential oils.ResultsThree prepubertal girls and one boy with clinical evidence of estrogenic action and a history of continuous exposure to lavender-containing fragrances were studied. Breast growth dissipated in all patients with discontinuation of the fragranced products. Some of the components tested elicited estrogenic and antiandrogenic properties of varying degrees.ConclusionWe report cases of premature thelarche that resolved upon cessation of lavender-containing fragrance exposure commonly used in Hispanic communities. The precise developmental basis for such conditions could be multifactorial. In vitro demonstration of estrogenic and antiandrogenic properties of essential oil components suggests essential oils in these cases could be considered a possible source and supports a possible link with idiopathic prepubertal breast development. Whether the level of lavender oil estrogenic potency is sufficient to cause these effects is unknown.

Funder

National Institute of Environmental Health Sciences

Publisher

The Endocrine Society

Subject

Biochemistry (medical),Clinical Biochemistry,Endocrinology,Biochemistry,Endocrinology, Diabetes and Metabolism

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