When consumed in large amounts, some plant-based foods and animal products may contribute to the growth of breast cells. In theory, these estrogenic foods stimulate breast growth by triggering a hormone response similar to estrogen, a key compound involved in female fertility, pregnancy and lactation. Before using a specialized diet to improve your breast growth, understand that no clinical trials have evaluated the long-term safety of an estrogenic diet. Consult your health care provider before eating a high-estrogen diet if you have a personal or family history of breast cancer.
According to Medline Plus, a service of the U.S. National Institutes of Health (NIH), soy is an excellent source of isoflavones. These phytoestrogens, which include the popular menopause remedy genistein, appear to influence estrogen levels within the human body. NIH acknowledges the theoretical use of soy as a breast enhancer, but no clinical studies have evaluated its efficacy. Excellent food sources of soy include tofu, tempeh, soy milk, soy crisps and edamame.

Renowned lactation consultant Kelly Bonyata notes that fennel, a sweet-tasting vegetable related to dill, has been used for centuries as a galactogogue. Breastfeeding mothers report that it can increase breast size and milk production. Like soy, fennel is a good source of natural compounds similar to estrogen. Consider using fennel seed as a spice or incorporating fennel root into your everyday meals.