What actually happens if my vitamin D is low?
Real vitamin D deficiency thins bones over years, aches muscles and bones, saps energy, and in severe cases softens bone outright. Indoor lives, covered clothing, darker skin at high latitudes and older age drive most of it.
Supplementing corrects a proven deficiency cheaply and matters especially for bones alongside calcium from food.
What vitamin D does not do is live up to the everything-cure reputation; trials keep disappointing beyond bone and deficiency correction. Test if you have risk factors or symptoms, treat the number found, and recheck after three months rather than megadosing on faith.
Source: NIH Office of Dietary Supplements, vitamin D fact sheet
See a doctor promptly if
- Bone pain in the ribs, hips, pelvis or shins that is tender to press, with difficulty rising from a chair or climbing stairs
- A fracture after a minor fall, or loss of height with a new stooped posture
- Muscle spasms, tingling around the mouth or in the hands, or seizures. These suggest very low calcium and need urgent care
- In an infant: delayed walking, bowing of the legs, a soft skull, or a swollen wrist and rib junction
- Symptoms of high calcium after high-dose supplements: excessive thirst, frequent urination, confusion, vomiting
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Answered by the AskDoc Medical Team · Medically reviewed under our Medical Director, MBBS · How we review
The one with a clear case
If a blood test shows you are low, a daily D3 tablet fixes it cheaply. Indoor-heavy lives and covered clothing make deficiency common. Test first; more is not better.
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