Does sun screen can contribute to a Vitamin D deficiency
Ask the DoctorLeslee B. Cochrane, MD.
Medical Director
Ramona Visiting Nurse Association and Hospice
Question: “I recently heard that using sun screen can contribute to a Vitamin D deficiency. Is that really true?”
While it is true that excessive sun exposure can increase the risk of skin cancer; your body needs 10-20 minutes of direct sun exposure two to three times per week in order to produce Vitamin D. Because wearing sun screen decreases this exposure; it may be a factor contributing to various problems associated with Vitamin D deficiency.
Most people know that Vitamin D is necessary to prevent rickets and maintain strong and healthy bones; but did you realize that Vitamin D is the only vitamin that is a hormone? Vitamin D acts by regulating the levels of calcium and phosphorus in the blood stream which affects the bones, circulation system and immune system as well.
Vitamin D deficiency is linked to a wide variety of conditions including osteoporosis, hypertension, muscle weakness, cancer and rheumatoid arthritis.
People at increased risk of Vitamin D deficiency include the elderly, obese individuals, dark skinned individuals, lactose intolerant individuals, and those with limited sun exposure. Common dietary sources of Vitamin D include pure cod liver oil, Vitamin D fortified Milk, salmon, tuna fish, and eggs. Because many people may not consume adequate quantities of these foods; supplementation is recommended for most people; and especially those at increased risk.
Vitamin D exists in two forms, Vitamin D2 and D3. Most dietary supplements contain Vitamin D2; which is not as effective as the D3 form. Although there is some controversy as to exactly how much Vitamin D is enough; most experts agree that the current recommended daily intake of 200 IU is not adequate. Supplemental doses between 1,000 and 2,000 IU of Vitamin D3 daily have generally been found to be safe and effective.
The next time you are looking for ways to save money; “just open up your heart and let the sun shine in” (it is cheaper than buying extra vitamin D!).
Need HELP? Please call our Healthy Elder Life Program at
1-888-983-5337; or visit us out on the web at http://www.help4elders.info .
If you would like to submit a question please contact Dr. Cochrane at lcochrane@ramonavna.org .