Persistent
vitamin D deficiency despite taking supplements can occur due to several reasons.
Common causes include inadequate dose or irregular intake, taking supplements on an empty stomach (vitamin D is absorbed better when taken with a meal containing some fat), and limited sun exposure.
Obesity and certain medications can also affect vitamin D levels. If deficiency persists despite proper supplementation, underlying conditions causing poor absorption, such as celiac disease or inflammatory bowel disease, should be considered.
Liver and
kidney disorders may also interfere with vitamin D metabolism.
Treatment usually involves vitamin D3 (cholecalciferol) 60,000 IU once weekly for 6–8 weeks, followed by maintenance therapy. However, the dose and duration should be individualized based on blood levels and under the guidance of a healthcare professional. If levels remain low despite treatment, further evaluation is recommended to identify and address the underlying cause.
Next Steps
To do Serum PTH,
calcium,phosphorus,magnesium,RFT and
LFT