Disadvantages: there are generally hormones in essential oils, which take effect quickly. Especially in the essential oil for breast enhancement, however, the breast tissue in the chest is easier to absorb hormones than the tissue in the waist, and the hormone level in the body is too high, which will lead to endocrine disorders and trigger a series of breast diseases. So please choose carefully. In particular, nipple is connective tissue, which is easily absorbed into various substances. If you apply essential oil for a long time, even if you avoid the nipple area, the essential oil itself has strong volatility and will be absorbed by the nipple in large quantities.