Elemental Composition of the Human Body by Mass

This is a table of the elemental composition of the human body by mass for a 70 kg (154 lb) person. The values for any particular person may be different, especially for the trace elements. Also, the element composition does not scale linearly. For example, a person who is half the mass may not contain half the amount of a given element. The molar amount of the most abundant elements is given in the table. You may also wish to view the element composition of the human body in terms of mass percent. Reference: Emsley, John, The Elements, 3rd ed., Clarendon Press, Oxford, 1998 Table of Elements in the Human Body by Mass oxygen 43 kg (61%, 2700 mol) carbon 16 kg (23%, 1300 mol) hydrogen 7 kg (10%, 6900 mol) nitrogen 1.8 kg (2.5%, 129 mol) calcium 1.0 kg (1.4%, 25 mol) phosphorus 780 g (1.1%, 25 mol) potassium 140 g (0.20%, 3.6 mol) sulfur 140 g (0.20%, 4.4 mol) sodium 100 g (0.14%, 4.3 mol) chlorine 95 g (0.14%, 2.7 mol) magnesium 19 g (0.03%, 0.78 mol) iron 4.2 g fluorine 2.6 g zinc 2.3 g silicon 1.0 g rubidium 0.68 g strontium 0.32 g bromine 0.26 g lead 0.12 g copper 72 mg aluminum 60 mg cadmium 50 mg cerium 40 mg barium 22 mg iodine 20 mg tin 20 mg titanium 20 mg boron 18 mg nickel 15 mg selenium 15 mg chromium 14 mg manganese 12 mg arsenic 7 mg lithium 7 mg cesium 6 mg mercury 6 mg germanium 5 mg molybdenum 5 mg cobalt 3 mg antimony 2 mg silver 2 mg niobium 1.5 mg zirconium 1 mg lanthanum 0.8 mg gallium 0.7 mg tellurium 0.7 mg yttrium 0.6 mg bismuth 0.5 mg thallium 0.5 mg indium 0.4 mg gold 0.2 mg scandium 0.2 mg tantalum 0.2 mg vanadium 0.11 mg thorium 0.1 mg uranium 0.1 mg samarium 50 g beryllium 36 g tungsten 20 g