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  1. Vitamin D Deficiency: Causes, Symptoms & Treatment - Cleveland Clinic

  2. 14 Signs of Vitamin D Deficiency: 12 Causes & Treatment - MedicineNet

  3. Vitamin D Deficiency: Causes, Symptoms & Health Risks - WebMD

  4. Vitamin D Deficiency: Symptoms, Treatments, and Causes - Healthline

  5. Vitamin D deficiency - Mayo Clinic

  6. 14 Signs of Vitamin D Deficiency & What You Can Do

  7. Low Vitamin D Symptoms: What To Know - Health

  8. Vitamin D Deficiency: Symptoms, Causes, and Treatment

  9. Symptoms of Vitamin D Deficiency (Children and Adults)

  10. Vitamin D Deficiency: Symptoms, Causes And Treatments

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