强化乳制品
You also can get vitamin D in fortified dairy products. But you need to be careful. There are only 100 units of vitamin D per cup, so kids and most adults would need at least four cups of dairy products per day. You could drink four glasses of milk a day, but most people choose not to.
你还可以从强化乳制品中得到维生素D，不过需要细心。每杯乳品仅含100单位的维生素D，不管大人小孩每天至少要喝4杯才能满足需要。你可以每天喝4杯牛奶，但很多人不这样做。
Multivitamin Supplements
服用综合维生素
Most multivitamins have a substantial amount of vitamin D.
综合维生素中含有大量的维生素D。
Vitamin D Supplements
服用维生素D
I recommend 1000 to 2000 international units of vitamin D supplements every day. It's cheap, there are no side effects or down sides. Although D3 is considered more potent and longer lasting, both D2 and D3 are acceptable.
专家建议每天服用1000至2000单位的维生素D。维生素D片很便宜，并且没有副作用。维生素D2公认最有效最持久，但D2和D3都可以接受。