The only naturally rich dietary sources are oily fish from the sea like salmon and mackerel, egg yolks, liver and fishliveroil.
富含天然维生素d的食品只有含油较多的鱼，例如三文鱼和鲭鱼、蛋黄、动物肝脏和鱼肝油。
2
Squalene is commercially extracted from fishoil, and in particular shark liver oil. Squalene used in pharmaceutical products and vaccines is purified from this source.
市售角鲨烯提取自鱼油—尤其是鲨鱼肝油，提纯后可用于药物制品和疫苗。
3
Helps detoxify. True vitamin a is found only in animal foods such as cod liveroil; fish and shellfish; and liver, butter and egg yolks from pasture-fed animals.