It is not possible to eat soy lecithin when you have fibroids because it contains a certain amount of progesterone as well as estrogen. Most fibroids are caused by the estrogen in the body, and when these foods or supplements are taken orally, they can cause fibroids to grow rapidly and induce frequent increases in fibroids. For safety, it is not recommended to eat soy lecithin, except soy lecithin, as much as possible like soy products or gum, which is not recommended to be taken orally for a long time to avoid also stimulating the increase of fibroids. When fibroids are present, it is advisable to review the ultrasound every three months or six months to ensure that the fibroids are not continuously increasing in size, and it is also advisable to have a tumor marker test to determine if there are any abnormalities.