Don't worry, these deficiencies are very common and highly treatable. To address your low Vitamin D, you should take cholecalciferol (Vitamin D3) supplements, typically 60,000 IU weekly for 8 weeks. For low B12, daily oral methylcobalamin (1000 mcg) is highly effective. To target the frontal hair loss, topical minoxidil (5%) can help stimulate regrowth. However, please consult a dermatologist to confirm if this is androgenetic alopecia (pattern baldness) or temporary shedding exacerbated by your vitamin deficiencies. Restoring these nutrient levels will significantly help improve your hair health and overall energy over the next few months.