A doctor suspects that one of her patients has a deficiency in one of the six key elements found in living organisms. He has low energy and extremely weak, soft bones. Based on this information alone, which nutrient supplement will she most likely prescribe?

Phosphorus is a major mineral in the body and combines with calcium to help build strong bones. A deficiency can contribute to weak, soft bones, so phosphorus is the best match; low energy can also occur when phosphorus is deficient. Zinc, sodium, and sulfur do not fit the bone symptoms as well.

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