To treat leg pain from a vitamin D deficiency, the most effective option is Cholecalciferol (Vitamin D3), as it raises your body's vitamin D levels more efficiently than Ergocalciferol (Vitamin D2). The exact dosage depends on the severity of your deficiency. For severe cases, a doctor may prescribe a high weekly dose of Cholecalciferol (typically 50,000 IU) for a short period, followed by a daily maintenance dose of 1,000 to 2,000 IU. Please consult your doctor for a simple blood test. They will recommend the exact dosage tailored to you, which will help safely and gradually relieve your leg pain.

Some persons may experience fatigue, body soreness, muscular weakness, joint discomfort, low energy, or bone weakening when their vitamin D level is below normal, at 18 ng/mL. Regular morning sun exposure, a nutritious diet, exercise, and foods fortified with vitamin D can occasionally help with mild deficiencies, but many people also require supplements like Vitamin D3 for greater recuperation. It is best to talk to your doctor about supplementation because the right dosage depends on your age, symptoms, calcium levels, and general health.

It is important to address both the deficiencies and the weight loss. Since standard supplements haven't helped, you may need prescription-strength, high-dose Vitamin D3 (cholecalciferol) and Vitamin B12 (cyanocobalamin). If your body isn't absorbing oral supplements well, Vitamin B12 injections are often highly effective. However, rapid weight loss alongside these deficiencies suggests an underlying issue, such as a gut absorption problem (like celiac disease) or thyroid imbalance. Please consult your healthcare provider to investigate the root cause of your weight loss. They can prescribe the correct therapeutic doses of these vitamins and ensure you recover safely.