The only naturally rich dietary sources are oily fish from the sea like salmon and mackerel, egg yolks, liver and fish liver oil.

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。

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Include: Fresh salmon fish, high-quality deep sea fish oil, dehydrated beef powder, dehydrated chicken powder, swallow's flour, fresh egg, flax seed oil, rice, soybean, maize, etc;

包含：新鲜三文鱼、优质深海鱼油、脱水牛肉粉、脱水鸡肉粉、燕麦粉、鲜鸡蛋、亚麻籽油、大米、大豆、玉米等；

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The American Heart Association recommends consuming both omega-3 fatty acids, found in cold-water fish like salmon and canola oil, and omega-6 fatty acids, found in nuts, seeds and vegetable oils such as corn oil.

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Most big studies confirming the cardiovascular benefits of omega-3s have tested either docosahexaenoic acid (DHA), an omega-3 found in salmon, sardines and breast milk, or another fish oil called eicosapentaenoic acid (EPA).

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Instead, the fishing industry processes them into fish meal and oil to make food pellets for salmon farming and livestock feed - especially for Danish pigs.

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