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Most Common Elements Present in the Human Body

Name the most common elements present in the human body by percentage, all of which are necessary for life!
https://en.wikipedia.org/wiki/Composition_of_the_human_body according to this source
There is another 0.1% of all other elements
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ZIZI
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Last updated: September 20, 2022
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First submittedSeptember 20, 2022
Times taken472
Average score72.7%
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Element
Percentage mass
Oxygen
65%
Carbon
18.5%
Hydrogen
10%
Nitrogen
3.2%
Calcium
1.5%
Phosphorus
1%
Element
Percentage mass
Potassium
0.4%
Sulfur
0.3%
Sodium
0.2%
Chlorine
0.2%
Magnesium
0.1%
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2 Comments
+1
Level 69
Jan 5, 2026
Iron? The amount of iron in an adult can make up a nail, so this 0.1% weight enough to be listed here?
+1
Level 71
Jan 5, 2026
Love this quiz! Nominated!

Too bad there's already a featured version... 😥