D'you go to the store yet?
D'you think this outfit suits me?
"Well, how d'you do, my dear fellow?" said Dolgorukov, who was sitting at tea with Bilibin.
What d'you think of the treat?
How d'you do, friend?
The same article notes that it's very hard to get all the vitamin D you need from food.
However, many foods are fortified with vitamin D, so while fortified foods can't provide all the vitamin D you need, it's still helpful.