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Weekly Health Quiz: Vitamin D, Cherries and Concussions

WARNING!

This is an older article that may not reflect Dr. Mercola’s current view on this topic. Use our search engine to find Dr. Mercola’s latest position on any health topic.

1 Which of the following nutrients is required for the activation of vitamin D in your body?

  • Vitamin K1
  • Vitamin C
  • Calcium
  • Magnesium

    Magnesium is necessary for the activation of vitamin D. Without sufficient amounts of it, your body cannot properly utilize the vitamin D you're taking. Learn more.

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