Considering that vitamin D is typically measured in nanograms, it would be pretty difficult to take pure vitamin D! But to answer the question I think you're a

Considering that vitamin D is typically measured in nanograms, it would be pretty difficult to take pure vitamin D! But to answer the question I think you're asking: I take pills. Now that I'm on a "maintenance dose" of 1000 IU/day I could theoretically get it from dietary sources if I worked hard; but when I was placed on 5000 IU/day there was no possible way to get enough that way.