Here is the elemental composition of a 70 kg (154lb) human body by mass.
It should also be noted, that these values will very from person to person by
a fair amount, especially among the trace elements.
Unfortunately, the variance of these values were not available, so the data
should be taken for informational purposes only. Furthermore, it is expected that these values do not scale
linearly (i.e. someone who weighs 100 kg, will not have 1.4 kg of calcium in threir body)
The table below shows the mass of each element, as well as the percent by mass, and approximate molar amount of the most prominent elements.
Mass of base elements for a 70 kg (154 lb) person.
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 µg
beryllium 36 µg
tungsten 20 µg
The raw data on which which this table is based is from
Emsley, John,
The Elements, 3rd ed., Clarendon Press, Oxford, 1998.