Green Pastures cod liver oil is the way to go for your vitamin D supplementation. Last year I was using it and I had stopped out of laziness.  Well this year, my vitamin D is so low that now I see the important benefits of it. Last year my level was good at 60 ng/ml in October. This year I’m low at 22 ng/ml. I plan on putting this back in my daily diet with winter right around the corner.