Vitamin D plays an important role in good health. It aids in the absorption of calcium, and may provide protection against cancer, osteoporosis and some autoimmune diseases. Not getting enough vitamin D can cause numerous health problems, including skeletal deformities, muscular weakness and weak bones. If you have a vitamin D deficiency, it is important to identify the potential causes so you can treat the condition and avoid future health complications.
Step 1
Note how often you go outdoors. Your body manufactures vitamin D after direct exposure to sunlight. Not getting enough sunlight may cause a vitamin D deficiency in some people.
Step 2
Examine your diet. Foods that are high in vitamin D include cheese, butter, margarine, fortified cereal and juices, fatty fish and milk. Check to see if you are getting enough of these types of foods in your diet. Vegetarians and those with a milk allergy may find it particularly difficult to reach the recommended daily value of vitamin D through food alone.
Step 3
Check the label of your vitamin supplements. Many multivitamin supplements contain some vitamin D, but some may not provide the amount you need. Ask your doctor how much vitamin D you should be taking and if the amount found in your supplement is sufficient.
Step 4
Talk to a pharmacist. Some medications may decrease your body's ability to absorb vitamin D. Report all of your current medications and supplements to a pharmacist to determine if this may be playing a role in your vitamin D deficiency.
Step 5
Get a medical checkup. Certain medical conditions may interfere with your body's ability to properly absorb vitamin D. Undergo the proper testing procedures at your doctor's office to rule this out.
Tips and Warnings
- Approximately 10 to 15 minutes of sunshine a few times a week can provide a considerable percentage of your vitamin D requirement, according to MayoClinic.com, although obtaining the vitamin through food or supplementation may still be necessary.
- Always talk to your doctor before attempting to diagnose or treat a vitamin D deficiency.



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