In a question-and-answer section of their website, breast-health experts from Mayo Clinic state that there is no evidence supporting the idea of natural breast enhancement supplements.

While the media (and many people's email spam-catchers) are full of offers for dietary supplements that promote breast growth, some of which are phytoestrogens, there is no proof that they actually work, and some could cause health problems.

What's a Phytoestrogen?

A phytoestrogen is an herb or herbal concoction that mimics the effects of estrogen in your body. While estrogen is related to breast growth, and it may seem logical that phytoestrogens would promote increased breast size, there are no published studies that support this result.

Herbs and herbal remedies have long been used as health aids, including some, like fennel, which purport to improve breast milk production, or others, including wild yam and red clover, which are used to treat breast disorders, but none of these will make breasts grow any larger.

As well, natural breast enhancers can be dangerous. The phytoestrogens used in such supplement may increase the risk of some kinds of breast cancer and some types of gynecologic cancers, and if you are taking any kind of blood thinning medication you could have serious drug interaction issues. Warfarin takers, specifically, are in danger of issues from drug interaction with phytoestrogens.

Does Anything Work?

Unfortunately, medical science is not yet at the level where we can pop a pill in lieu of plastic surgery, and grow larger breasts. If you are uncomfortable with surgical options, there are any number of breast enhancement products that will make your breasts look bigger, though this usually involves placing something inside your bra.

Otherwise, the only real way to achieve greater breast size is to have implants, and while the surgery can be expensive, and is not covered by insurance, it is as safe as any surgical procedure can be, with rare complications.