Some fish are rich in vitamin D, but most foods are not, and fortification in dairy products is the most popular dietary source for many people, along with some supplementation when needed.

• 某些鱼类含有丰富的维生素D，但是大多数食品并不如此，对许多人来说多饮食乳制品是最流行的营养饮食方法，再加上一些必要的营养补充。