Composition of the human body

Table columns:
Atomic number
Element
Fraction of mass[8][9][10][11][12][13]
Mass (kg)[14]
Atomic percent
Essential in humans[15]
Negative effects of excess
Group

Table rows:
cells: 8
Oxygen
0.65
43
24
Yes (e.g. water, electron acceptor)[16]
Reactive oxygen species
16
cells: 6
Carbon
0.18
16
12
Yes[16] (organic compounds)
14
cells: 1
Hydrogen
0.10
7
62
Yes[16] (e.g. water)
1
cells: 7
Nitrogen
0.03
1.8
1.1
Yes[16] (e.g. DNA and amino acids)
15
cells: 20
Calcium
0.014
1.0
0.22
Yes[16][17][18] (e.g. Calmodulin and Hydroxylapatite in bones)
2
cells: 15
Phosphorus
0.011
0.78
0.22
Yes[16][17][18] (e.g. DNA and phosphorylation)
white allotrope highly toxic
15
cells: 19
Potassium
2.0×10−3
0.14
0.033
Yes[16][17] (e.g. Na+/K+-ATPase)
1
cells: 16
Sulfur
2.5×10−3
0.14
0.038
Yes[16] (e.g. Cysteine, Methionine, Biotin, Thiamine)
16
cells: 11
Sodium
1.5×10−3
0.10
0.037
Yes[17] (e.g. Na+/K+-ATPase)
1
cells: 17
Chlorine
1.5×10−3
0.095
0.024
Yes[17][18] (e.g. Cl-transporting ATPase)
17
cells: 12
Magnesium
500×10−6
0.019
0.0070
Yes[17][18] (e.g. binding to ATP and other nucleotides)
2
cells: 26
Iron*
60×10−6
0.0042
0.00067
Yes[17][18] (e.g. Hemoglobin, Cytochromes)
8
cells: 9
Fluorine
37×10−6
0.0026
0.0012
Yes (AUS, NZ),[19] No (US, EU),[20][21] Maybe (WHO)[22]
toxic in high amounts
17
cells: 30
Zinc
32×10−6
0.0023
0.00031
Yes[17][18] (e.g. Zinc finger proteins)
12
cells: 14
Silicon
20×10−6
0.0010
0.0058
Possibly[7]
14
cells: 37
Rubidium
4.6×10−6
0.00068
0.000033
No
1
cells: 38
Strontium
4.6×10−6
0.00032
0.000033
——
2
cells: 35
Bromine
2.9×10−6
0.00026
0.000030
——
17
cells: 82
Lead
1.7×10−6
0.00012
0.0000045
No
toxic
14
cells: 29
Copper
1×10−6
0.000072
0.0000104
Yes[17][18] (e.g. copper proteins)
11
cells: 13
Aluminium
870×10−9
0.000060
0.000015
No
13
cells: 48
Cadmium
720×10−9
0.000050
0.0000045
No
toxic
12
cells: 58
Cerium
570×10−9
0.000040
No
cells: 56
Barium
310×10−9
0.000022
0.0000012
No
toxic in higher amounts
2
cells: 50
Tin
240×10−9
0.000020
6.0×10−7
No
14
cells: 53
Iodine
160×10−9
0.000020
7.5×10−7
Yes[17][18] (e.g. thyroxine, triiodothyronine)
17
cells: 22
Titanium
130×10−9
0.000020
No
4
cells: 5
Boron
690×10−9
0.000018
0.0000030
Probably[7][23]
13
cells: 34
Selenium
190×10−9
0.000015
4.5×10−8
Yes[17][18]
toxic in higher amounts
16
cells: 28
Nickel
140×10−9
0.000015
0.0000015
Probably[7][23]
toxic in higher amounts
10
cells: 24
Chromium
24×10−9
0.000014
8.9×10−8
Yes[17][18]
6
cells: 25
Manganese
170×10−9
0.000012
0.0000015
Yes[17][18] (e.g. Mn-SOD)
7
cells: 33
Arsenic
260×10−9
0.000007
8.9×10−8
Possibly[1][7]
toxic in higher amounts
15
cells: 3
Lithium
31×10−9
0.000007
0.0000015
Yes (intercorrelated with the functions of several enzymes, hormones and vitamins)
toxic in higher amounts
1
cells: 80
Mercury
190×10−9
0.000006
8.9×10−8
No
toxic
12
cells: 55
Caesium
21×10−9
0.000006
1.0×10−7
No
1
cells: 42
Molybdenum
130×10−9
0.000005
4.5×10−8
Yes[17][18] (e.g. the molybdenum oxotransferases, Xanthine oxidase and Sulfite oxidase)
6
cells: 32
Germanium
5×10−6
No
14
cells: 27
Cobalt
21×10−9
0.000003
3.0×10−7
Yes (cobalamin, B12)[24][25]
9
cells: 51
Antimony
110×10−9
0.000002
No
toxic
15
cells: 47
Silver
10×10−9
0.000002
No
11
cells: 41
Niobium
1600×10−9
0.0000015
No
5
cells: 40
Zirconium
6×10−6
0.000001
3.0×10−7
No
4
cells: 57
Lanthanum
1370×10−9
8×10−7
No
cells: 52
Tellurium
120×10−9
7×10−7
No
16
cells: 31
Gallium
7×10−7
No
13
cells: 39
Yttrium
6×10−7
No
3
cells: 83
Bismuth
5×10−7
No
15
cells: 81
Thallium
5×10−7
No
highly toxic
13
cells: 49
Indium
4×10−7
No
13
cells: 79
Gold
3×10−9
2×10−7
3.0×10−7
No
uncoated nanoparticles possibly genotoxic[26][27][28]
11
cells: 21
Scandium
2×10−7
No
3
cells: 73
Tantalum
2×10−7
No
5
cells: 23
Vanadium
260×10−9
1.1×10−7
1.2×10−8
Possibly[7] (suggested osteo-metabolism (bone) growth factor)
5
cells: 90
Thorium
1×10−7
No
toxic, radioactive
cells: 92
Uranium
1×10−7
3.0×10−9
No
toxic, radioactive
cells: 62
Samarium
5.0×10−8
No
cells: 74
Tungsten
2.0×10−8
No
6
cells: 4
Beryllium
3.6×10−8
4.5×10−8
No
toxic in higher amounts
2
cells: 88
Radium
3×10−14
1×10−17
No
toxic, radioactive
2

Questions about this table:
originalText: the element which is the most abundant in the human body is
answer: answerTexts: Oxygen