More than 77 percent of Americans are deficient in one key nutrient: vitamin D [1]. But that’s not all. Many of us are imbalanced in vitamin A and vitamin K2. Alone or combined, these disparities can lead to serious health issues if not corrected.

And here’s the craziest part: getting the balance right of these three critical elements is not actually that hard—we’re just uninformed about how to do it.

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