Here are the top 6 elements in the human body, by weight:
| Oxygen | 65% |
| Carbon | 18% |
| Hydrogen | 10% |
| Nitrogen | 3% |
| Calcium | 2% |
| Phosphorous | 1.1% |
At less than 0.35% are potassium, sulphur, sodium, chlorine.
Traces of elements: magnesium, iron, manganese, copper,iodine, cobalt, zinc.
From: The Chemistry of Life ~ Steven Rose
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