intresting calcium and magnesium info
 

Take extra calcium and magnesium. If you look at the label of any once-daily multivitamin, you'll notice a "mineral gap"—a place where certain minerals should be listed. Even if they're included, most multis contain only a small percentage of the Daily Value (% DV) of calcium, magnesium and potassium.

Calcium is important for fat-burning metabolism, magnesium for training performance and potassium for muscle cell volume. A once-daily multivitamin simply doesn't cut it. Correct the situation by taking 1,000 mg per day of supplement-source calcium (or two to three cups of fat-free dairy products), 450 mg of magnesium, and five or six servings of fruits and vegetables per day