Just walk outside for at least 10 minutes a day, with no gloves, if you have sunlight. D is not really a vitamin, it's a hormone. All the D you need, as your body manufactures it...

I'm no advocate of meat eating most meats, eggs, salmon contain oodles of D. Ricotta cheese is a great source, also...

There's a only a few manufacturers that sell real D, as everything else is synthetic and full of magnesium stearate (a kidney toxin), and bad preservatives...

The costlier ones tend to be devoid of these things, but can hurt the pocket...