Pueraria Mirifica has 3000 times the estrogenic activity of soy isoflavones and 100 times that of red clover. Its phytoestrogens trick the body into thinking real estrogen is present by the process of selective estrogen receptor modulation.
This promotes the secondary female sexual characteristic of glandular tissue build up in the breast. An additional benefit is that real estrogen with its cancer promoting effect is prevented from attaching to these receptors.
Fenugreek can increase breast size as a galactagogue which produces prolactin and fat storage as well as by insulin sensitization which can lower androgen levels.