BIOELEMENTS AND THEIR PERCENTAGES
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The elements which are used in formation of various chemical compounds from which living organisms are made are called Bio-elements.

Out of 92 naturally occurring chemical compounds, only 16 are bio-elements and out of these 16 only 6 account for 99% of the total mass in human body.

Percentages of Bio-Elements by Mass in Human Being


Oxygen                                                              65%
Carbon                                                               18%
Hydrogen                                                           10%
Nitrogen                                                               3%
Calcium                                                                2%
Phosphorous                                                        1%
Potassium                                                       0.35%
Sulphur                                                           0.25%
Chlorine                                                          0.15%
Sodium                                                            0.15%
Magnesium                                                     0.05%
Iron                                                                0.004%

Some elements like Copper, Manganese, Zinc and iodine are present in Traces.


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