A deficiency in vitamin D may produce no symptoms, but bone pain and muscle weakness may be an indication. On the other hand, bone pain and muscle weakness are an indication of several health complications, so it may be prudent to determine whether you're at risk and see a doctor for tests if you suspect a vitamin D deficiency. Those particularly at risk include those with fat malabsorption, limited sun exposure, dark skin and a history of gastric bypass surgery.
Seniors and breastfed babies are also at risk for developing a vitamin D deficiency, but mothers and seniors who supplement their diets with extra vitamin D can prevent this deficiency. The elderly should consume up to 10 micrograms of vitamin D per day, while everyone else should have 5 micrograms.

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