Essential oils are plant-based, and some contain phytoestrogens. These are plant-based substances that behave similarly to the hormone estrogen. Some experts believe that essential oils containing phytoestrogens may help balance hormones and relieve symptoms such as mood changes and hot flashes during menopause.Some concern is that Lavender Oil can disrupt pre-pubescent boys' hormonal development. For this reason, we suggest only using EARTH in Sandalwood Rose or Citrus & Cedar for boys before puberty.