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Magnesium: Master mineral

What: Calcium is the billion-dollar mineral, but by 2020 magnesium is projected to catch right up.

Why: It’s a co-factor for hundreds of metabolic actions, from helping the body absorb calcium to relaxing muscles. Moreso than cholesterol or fat intake, it’s low magnesium levels that are the greatest indicator of all aspects of heart disease. Also notable for stress and sleep.

Where: It’s a large molecule, so taking 400 mg/day is unrealistic in a multi, but powders and standalones make it possible.