Uterine fibroids (UFs) are benign tumours of the uterus made up of muscle and fibrous tissue. They may be single or multiple and can sometimes reach a huge size.
UFs are quite common, particularly in women over 35 where it is reported that between 20 to 40 percent have uterine fibroids of significant size.
UFs are sensitive to the effects of estrogen and will generally continue to slowly grow up until the time of the menopause, following which fibroids will normally shrink.
In many cases, UFs will cause no symptoms. However, they can result in heavy and prolonged menstrual bleeds, and sometimes lower abdominal pain, a sensation of fullness, or dragging feeling in the pelvis. If fibroids exert pressure on the bladder then painful and frequent urination may develop, while pressure on the bowel can cause backache and constipation.
Vitamin D is one of the essential nutrients for human bodies. Recent studies have found that vitamin D significantly inhibited the growth of UFs. For example, two groups have demonstrated that low levels of serum 25-hydroxyvitamin D3 are linked with increased risk of UFs.
Another study found that patients with vitamin D deficiency had increased risks of UFs. An open-label clinical trial indicated that the supplement of vitamin D in women with UFs stabilised the growth of fibroids and prevented the onset of its related symptoms.
Poor liver function can play a part in hormonal imbalances, resulting in conditions such as fibroids and endometriosis. Milk thistle is often promoted for its liver-protecting effects and may help reduce the chances of having UFs.