Chemical makeup of the human body | ![]() |
The human body is a combination of elements and compounds. The average adult (a 70 kilogram adult) is composed of: | |
Element | % |
Oxygen | 65 |
Carbon | 18 |
Hydrogen | 10 |
Nitrogen | 3 |
Calcium | 1.5 |
Phosphorus | 1 |
Sulfur | 0.25 |
Potassium | 0.2 |
Chlorine | 0.15 |
Sodium | 0.15 |
Magnesium | 0.05 |
Iron | 0.006 |
Fluorine | 0.0037 |
Zinc | 0.0032 |
Silicon | 0.002 |
Zirconium | 0.0006 |
Rubidium | 0.00046 |
Strontium | 0.00046 |
Bromine | 0.00029 |
Lead | 0.00017 |
Niobium | 0.00016 |
Copper | 0.0001 |
Aluminum | 0.000087 |
Cadmium | 0.000072 |
Boron | 0.000069 |
Barium | 0.000031 |
Arsenic | 0.000026 |
Vanadium | 0.000026 |
Tin | 0.000024 |
Mercury | 0.000019 |
Selenium | 0.000019 |
Manganese | 0.000017 |
Iodine | 0.000016 |
Gold | 0.000014 |
Nickel | 0.000014 |
Molybdenum | 0.000013 |
Titanium | 0.000013 |
Tellurium | 0.000012 |
Antimony | 0.000011 |
Lithium | 0.0000031 |
Chromium | 0.0000024 |
Cesium | 0.0000021 |
Cobalt | 0.0000021 |
Silver | 0.000001 |
Uranium | 0.00000013 |
Beryllium | 0.000000005 |
Radium | 0.00000000000000001 |