Most women have periods that occur an average of 28 days apart, although some regularly have longer or shorter cycles. Abnormal or irregular bleeding occurs for a number of reasons and may be a symptom of an underlying disease. While too much vitamin D can cause certain side effects, there is no evidence that it contributes to irregular menstrual periods.
Vitamin D
Vitamin D is an essential nutrient that plays a key role in creating and maintaining bone strength. This fat-soluble vitamin also helps protect your immune system. Vitamin D may help protect against osteoporosis and rickets. Sunlight exposure allows your body to make vitamin D. People with fair skin require less sunlight than those with dark skin tones. Vitamin D supplements can help guard against a deficiency, especially in people who don't spend much time outdoors. The maximum limit for vitamin D is 2,000 IU daily for adults, according to the University of Maryland Medical Center. Although sunlight exposure won't give you an overdose of vitamin D, taking too many supplements may cause uncomfortable symptoms.
Irregular Periods
Irregular periods include vaginal bleeding between normal menstrual cycles, as well as periods that occur later or earlier than usual. Abnormal bleeding can also involve heavier than normal periods or periods that last longer than seven days at a time. Common causes of irregular menstruation include pelvic infections, polycystic ovary syndrome, ectopic pregnancy, diabetes and abnormal hormone levels.
Considerations
Although too much vitamin D is unlikely to affect your menstrual periods, certain medications can cause menstrual irregularities. Intrauterine devices, birth control pills, steroids and blood thinners may contribute to abnormal vaginal bleeding. Irregular bleeding may be a symptom of a serious disorder, such as cancer, fibroids or platelets disorder. Your doctor can help determine the underlying cause of your irregular periods and can provide the proper treatment for your condition.
Precautions
Although vitamin D may not be to blame for irregular periods, too much of this nutrient can cause diarrhea, vomiting, bone pain, itchy eyes and excessive thirst. Excessive amounts of vitamin D may also cause poor appetite and weight loss. Since people absorb vitamin D differently, it is important to consult your doctor before supplementing the natural vitamin D in your body with vitamin pills. Vitamin D supplements may interact with certain medications, such as statin drugs and calcium channel blockers.
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