I found an old article...

[Dave001]

Im testing lavendar on a toe hair right now, will know in a couple of more months whether its a good anti-androgen.

N Engl J Med. 2007 Feb 1;356(5):479-85.

Prepubertal gynecomastia linked to lavender and tea tree oils.

Henley DV, Lipson N, Korach KS, Bloch CA.

Receptor Biology Section, Laboratory of Reproductive and Developmental Toxicology, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA.

Most cases of male prepubertal gynecomastia are classified as idiopathic. We investigated possible causes of gynecomastia in three prepubertal boys who were otherwise healthy and had normal serum concentrations of endogenous steroids. In all three boys, gynecomastia coincided with the topical application of products that contained lavender and tea tree oils. Gynecomastia resolved in each patient shortly after the use of products containing these oils was discontinued. Furthermore, studies in human cell lines indicated that the two oils had estrogenic and antiandrogenic activities. We conclude that repeated topical exposure to lavender and tea tree oils probably caused prepubertal gynecomastia in these boys. 2007 Massachusetts Medical Society

PMID: 17267908