My Vitamin D level was low & I am no longer comfortable spending time in the sun ( even with sun screen ) after several bouts with Skin cancer . My doctor ordered this high level dosage to be taken once a week until my blood level is where he wants it to be . It's availability on Amazon kept me from having to truck around looking for this large dosage . It came as an easy to swallow capsule but since I may have intervals of not using this product I might rather have had a tablet