What is the chemical composition of the human body?
oxygen 61.3533 
carbon  22.8291 
hydrogen 9.9877 
nitrogen 2.5683
calcium 1.4268
phosphorus 1.1129
potassium 0.20
sulfur 0.20
sodium 0.14
chlorine 0.14
magnesium 0.03
iron 0.01
fluorine 0.004
zinc 0.003
silicon 0.001
rubidium 0.001
strontium 0.0005
bromine 0.0004
lead 0.0002
copper 0.0001
aluminum 0.0001
cadmium 0.0001
cerium 0.0001
barium 0.00003
iodine 0.00003
tin 0.00003
titanium 0.00003
boron 0.00003
nickel 0.00002
selenium 0.00002
chromium 0.00002
manganese 0.00002
arsenic 0.000010
lithium 0.000010
cesium 0.000009
mercury 0.000009
germanium 0.000007
molybdenum 0.000007
cobalt 0.000004
antimony 0.000003
silver 0.000003
niobium 0.000002
zirconium 0.000001
lanthanium 0.000001
gallium 0.000001
tellurium 0.000001
yttrium 0.0000009
bismuth 0.0000007
thallium 0.0000007
indium 0.0000006
gold 0.0000003
scandium 0.0000003
tantalum 0.0000003
vanadium 0.0000002
thorium 0.0000001
uranium 0.0000001
samarium 0.00000007
beryllium 0.00000005
tungsten 0.00000003


Reference: Emsley, John, The Elements , 3rd ed., Clarendon Press, Oxford, 1998