are food forms of magnesium superior to supplemets?

Chocolate milk contains oxalic acid, which initially lead researchers to believe that the calcium in chocolate milk would not be readily absorbed by the body. As it turns out, the oxalic acid will bind with calcium and prevent absorption, but it is present in such small amounts that the effects are negligible; enough calcium is free for the body to absorb it. The focus now is on the replenishing effects of chocolate milk for hard core athletes. A study done in 2006 examined nine male cyclists who rode a certain distance, stopped to break, then rode again until completely exhausted. During the break, some were given Gatorade, some Endurox (a sports drink containing electrolytes, carbohydrates, and protein), and some were given low fat chocolate milk. The cyclists who drank the chocolate milk biked 50% farther than the cyclists who drank Endurox, and the same distance as those that consumed Gatorade. Though Endurox has the same carbohydrate to protein ratio as chocolate milk (and costs at least twice as much!), it did not offer the same nourishment for the athletes, possibly because of a different sugar composition.