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What is the preferable source of vitamin D3 in a supplement?

Asked by  mona1 on June 11, 2017

  •  mona1 on

    See title

    Answered by  mona1 on
  •  IAW on

    Do you mean what company it comes from (manufacturer) or do you mean where the D3 comes from (the source)?

    Answered by  IAW on

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