Best Sources of Vitamin D

  • Fatty fish like mackerel, tuna and salmon contain high levels of vitamin D.
  • Fish liver oil is considered the best and the most reliable source of Vitamin D.
  • There are traces of vitamin D in beef liver, egg yolks and cheese.
  • Most of the milk supply in the U.S. consists of 100 I.U. of vitamin D per cup.
  • Vitamin D2 is derived from plant sources. Vitamin D3 is derived from animal sources.

Diagnosis of Vitamin D deficiency is simple. A lab test called 25(OH)D can be performed.

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