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 bones and also helps cells store and use energy. A phosphorus deficiency can therefore contribute to weak, soft bones and low energy. Zinc, sodium, and sulfur do not best match both symptoms, so phosphorus is the most likely choice.

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