Chemical Composition of the Human Body

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The table below shows the approximate quantities of the chemical elements present in an average 70kg man.                   

Element            

Amount / kg 

Amount / Mol.

Oxygen

  43

2700

Carbon

16

1300

Hydrogen

7

7000

Nitrogen

1

.8

130

Calcium

1

.0

25

Phosphorus

0

.78

25

Sulphur

0

.14

4

.4

Potassium

0

.14

3

.6

Sodium

0

.10

4

.3

Chlorine

0

.095

2

.7

Magnesium

0

.019

0

.78

Silicon

0

.018

0

.64

Iron

0

.0042

0

.075

Fluorine

0

.0026

0

.14

Zinc

0

.0023

0

.035

Rubidium

0

.00032

0

.0037

Strontium

0

.00032

0

.0037

Bromine

0

.00020

0

.0025

Lead

0

.00012

0

.00058

Copper

0

.000072

0

.0011

Aluminium

0

.000061

0

.0023

Cadmium

0

.000050

0

.00044

Boron

< 0

.000048

0

.0044

Barium

0

.000022

0

.00016

Tin

< 0

.000017

0

.00014

Iodine

0

.000013

0

.00010

Manganese

0

.000012

0

.00022

Nickel

0

.000010

0

.00017

Gold

< 0

.000010

0

.000051

Molybdenum

< 0

.0000093

0

.000097

Chromium

< 0

.0000018

0

.000035

Caesium

0

.0000015

0

.000011

Cobalt

0

.0000015

0

.000025

Uranium

0

.00000009

0

.00000038

Beryllium

0

.000000036

0

.0000040

Radium

3.1×10-14

1.4×10-13

              Chemical composition of the human body by mass
Related links

Periodic Table

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This page was last changed on: 14 March 2007.

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