Vitamin D deficiency is very common and easily treatable. Typically, doctors prescribe a high-dose Vitamin D3 (cholecalciferol) supplement, often taken weekly for 8 to 12 weeks to quickly restore levels. After this initial phase, a lower daily maintenance dose of Vitamin D3 (usually 800 to 2,000 IU) is recommended. Sometimes, calcium supplements are also suggested to support bone health. Your father will likely need a simple blood test after a few months to monitor his progress. I highly recommend consulting his doctor to get the exact dosage tailored to his specific levels and health needs.

Your Vitamin D level of 12.06 ng/ml indicates a deficiency. To safely correct this, I recommend taking oral Cholecalciferol (Vitamin D3), typically prescribed at 50,000 IU once weekly for 8 weeks, followed by a daily maintenance dose of 1,000 to 2,000 IU. Your Vitamin B12 level of 385 pg/ml is within the normal range, but can be optimized. You can take a daily oral supplement of Methylcobalamin or Cyanocobalamin (Vitamin B12) at 500 to 1,000 mcg. There is no need to worry; these are very common and easily manageable levels. Please consult your doctor to confirm these dosages and schedule a follow-up test in three months.