10 Possible Signs of Vitamin D Deficiency and When to Get Tested

Vitamin D supports strong bones, normal muscle function and the immune system. The body produces it when the skin is exposed to sunlight, and it is also found in foods such as oily fish, egg yolks and fortified products. Possible signs of low vitamin D include persistent tiredness, muscle weakness, aches or cramps, bone or back pain, frequent illness, mood changes, slow wound healing, hair loss and, in older adults, a higher risk of falls. These symptoms can also be caused by many other health conditions. A blood test is the most reliable way to confirm vitamin D deficiency. Speak with a healthcare professional if you have ongoing fatigue, unexplained weakness, bone pain or significant hair loss. Avoid taking high-dose supplements without medical advice, as excessive vitamin D can be harmful. People with limited sun exposure, darker skin, covered skin, older age or conditions that affect nutrient absorption may have a higher risk of deficiency.

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