Elements in the Human Body

By | September 30, 2015

Human body is made up of many elements but 99% of the mass of the human body consists of composition of six major elements: oxygen, carbon, hydrogen, nitrogen, calcium and phosphorous.  Another five elements in the human body (potassium, sulfur, sodium, chlorine and magnesium) composed of 0.85% of the mass of the human body.

Percentage composition of major elements found in the normal human body by mass percentage (%) is given below in the tabular form.

Name of the Element
Percentage of composition in Human Body
Oxygen
65.0
Carbon
18.0
Hydrogen
10.0
Nitrogen
3.0
Calcium
2.0
Phosphorus
1.1
Potassium
0.35
Sulphur
0.25
Sodium
0.15
Chlorine
0.15
Magnesium
0.05
Iron
0.004
Iodine
0.00004
Manganese
0.00013
Copper
0.0014
Cobalt
0.00000016