I don't drink milk, never have. Any calcium I get is from cheese. I'm not a fish eater either. But, I work in an inner office with no window, so I don't even get light, never mind sunshine. I'm out on the patio a bit in the summer on weekends. Other than that, the most sunshine I get is two weeks in FL every year. Obviously not enough. I'm hoping that by taking the Vitamin D3 pills, it will boost my immune system. Of course, I'll have to stop working 50 hours a week, but that is going to happen by the end of this month.