Deficiency and Toxicity@

» Phosphorus    A discussion of phosphorus with functions, deficiency signs, food sources, supplements, and recommendations from the Linus Pauling Institute.    http://lpi.oregonstate.edu/infocenter/minerals/phosphorus/

» Phosphorus Dietary Mineral    Facts about the mineral such as functions, RDA suggested intake, and food sources.    http://www.anyvitamins.com/phosphorus-info.htm