Two months ago, my blood tests showed severe deficiencies: Vitamin D was 5 ng/mL and Vitamin B12 was 101 pg/mL. I was treated with an Arachitol 6L vitamin D injection, followed by a 60,000 IU vitamin D capsule three days later. After taking the capsule, I experienced sudden dizziness and unsteadiness, which caused me to fall, although I did not lose consciousness. Since then, I have been taking 1,000 IU of vitamin D daily. My recent blood tests show that my Vitamin D has improved to 20 ng/mL and my Vitamin B12 is now 946 pg/mL. Most of my deficiency-related symptoms have resolved, but the dizziness and feeling of unsteadiness that started after that episode have persisted and have not completely gone away. I would like to know what could be causing these ongoing symptoms and what further evaluation or treatment might be needed. Thank you