Uterine Fibroids affect around 20 percent of women over 35 years old. Estrogen, blood sugar levels, and growth hormones trigger the growth of the fibroid so changing your lifestyle to a high-fiber diet will aid in shrinking them. High-fiber foods, such as beans, whole grains, berries and melons, assist the liver in processing estrogen and removing unneeded estrogen from your body and shrink your fibroids. In addition to adding food to shrink your fibroids, you should also avoid certain foods like red meat, processed sugars and dairy products. These foods increase estrogen production and trigger fibroid growth.