English-Hanzi/Very few foods (such as oily fish) naturally contain large amounts of vitamin D

Very few foods (such as oily fish) naturally contain large amounts of vitamin D. In the United States and other countries, milk and vegetable milk substitutes are rich in vitamin D, as are many breakfast cereals. Mushrooms produce useful amounts of vitamin D when exposed to ultraviolet light. 很少有食物（如油性鱼）天然含有大量的维生素D。在美国和其他国家，牛奶和植物奶替代品富含维生素D，许多早餐谷物也是如此。 蘑菇在暴露于紫外线下时会产生有用量的维生素D。