Reply To: Hello, I have been diagnosed with Vitamin D deficiency, my level is 8.0 ng/mL. I am 6 feet tall, around 140 lbs. I was prescribed 50 000 IU once a week for 8 weeks. I am afraid to take such a big one-time dose so I wanted to ask you if what I am planning to do would work. I purchased D3 and plan on taking 8000 IU daily/56 000 weekly for 2 months and get tested again. Thank you!