Get a blood test to confirm vitamin D deficiency and determine the dose needed
Take vitamin D3 supplements as prescribed by a healthcare professional
Use the prescribed treatment dose consistently for the full recommended period
Follow up with repeat blood testing to check vitamin D levels
Increase safe sun exposure when appropriate
Eat vitamin D-rich foods such as fatty fish, egg yolks, fortified milk, and fortified cereals
Address calcium intake if recommended by a healthcare professional
Treat underlying causes such as malabsorption, liver disease, kidney disease, or certain medications
Maintain a long-term maintenance dose if advised after levels normalize
Avoid taking excessive vitamin D without medical guidance