Perhaps you are like my household and have different essential oils laying around the house. Maybe you even have a diffuser to spread that lovely smell of Lavender around your home. However a recent study suggests that over use of Lavender and Tea Tree oil can act as a hormone disruptor and even cause young developing males to grow breasts.
"Our society deems essential oils as safe," said study lead investigator J. Tyler Ramsey, a postbaccalaureate research fellow at the National Institute of Environmental Health Sciences (NIEHS), part of the National Institutes of Health. "However, they possess a diverse amount of chemicals and should be used with caution because some of these chemicals are potential endocrine disruptors."
If you use oils like I do, then I suggest you give this article a read:
https://www.sciencedaily.com/releases/2018/03/180318144856.htm