What should you know about vegan vitamin D deficiency?

Vitamin D helps the body absorb calcium and supports bones and muscles. Few foods naturally contain it, and plant-based diets may rely on fortified drinks, spreads or cereals. Skin can make vitamin D after sunlight exposure, but this varies with season, skin tone, clothing, location and sun protection. Low vitamin D may be linked with fatigue, generalised weakness or joint pain, although these symptoms have many possible causes. Vitamin D deficiency can also weaken bones and contribute to a stress fracture.

Review your usual intake with a GP or dietitian, especially if you avoid fortified foods, spend little time outdoors, have darker skin, or have a condition affecting absorption. A blood test may be advised when deficiency is suspected. Choose fortified vegan foods according to their labels and do not take high-dose supplements without guidance, because excess vitamin D can also cause harm. Ask whether calcium intake and bone health need review. Obesity can alter vitamin D handling, so share relevant medical history.

Arrange medical advice for persistent fatigue, weakness, or joint or bone pain, particularly after a minor injury. Seek urgent assessment for severe pain, inability to use a limb, or a suspected fracture. A clinician can distinguish vitamin D deficiency from other causes and decide whether testing or treatment is appropriate.

Could my symptoms or diet justify a vitamin D blood test? Which fortified foods or supplement type suit me? Should my calcium intake, medicines, or bone health be checked?