Weekly Health Quiz: Bats, Face Masks and More

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By Dr. Mercola

1 Which of these nutrients work in tandem with vitamin D and will significantly improve your vitamin D level using a lower dosage when taken concomitantly with vitamin D?

  • Magnesium and vitamin K2

    Combined intake of both supplemental magnesium and vitamin K2 has a greater effect on vitamin D levels than either individually. You need 244% more oral vitamin D if you’re not concomitantly taking magnesium and vitamin K2. Learn more.

  • Vitamins B6 and B12
  • Calcium and iron
  • Vitamins B1 and E

2 Which of the following is likely the greatest threat to humanity?

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