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Biology and Biochemistry
Germany
2026

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Best Scientists 167 963 883 45 45 809 128363
Biology and Biochemistry 168 95 83 6 6 766 133137

Helmut Sies publications per year

The chart shows the history of publications by Helmut Sies between 1969 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Helmut Sies published across 57 years, from 1969 to 2025, averaging 14.6 papers a year. Output peaked at 32 publications in 1996. 8 of the 830 publications appeared in the last two years.

No. of publications
10 20 30
Bar chart. Horizontal axis: year, 1969 to 2025. Vertical axis: number of publications, 0 to 32. Peak 32 publications in 1996. 1969: 6 publications 1970: 3 publications 1971: 1 publication 1972: 5 publications 1973: 5 publications 1974: 3 publications 1975: 4 publications 1976: 1 publication 1977: 8 publications 1978: 16 publications 1979: 9 publications 1980: 10 publications 1981: 9 publications 1982: 11 publications 1983: 22 publications 1984: 30 publications 1985: 13 publications 1986: 12 publications 1987: 18 publications 1988: 15 publications 1989: 30 publications 1990: 25 publications 1991: 18 publications 1992: 29 publications 1993: 21 publications 1994: 22 publications 1995: 21 publications 1996: 32 publications 1997: 23 publications 1998: 31 publications 1999: 27 publications 2000: 27 publications 2001: 27 publications 2002: 29 publications 2003: 27 publications 2004: 21 publications 2005: 31 publications 2006: 26 publications 2007: 19 publications 2008: 16 publications 2009: 13 publications 2010: 7 publications 2011: 9 publications 2012: 10 publications 2013: 6 publications 2014: 9 publications 2015: 13 publications 2016: 3 publications 2017: 5 publications 2018: 5 publications 2019: 4 publications 2020: 8 publications 2021: 7 publications 2022: 10 publications 2023: 10 publications 2024: 6 publications 2025: 2 publications
1969 2025

830 publications in total across all disciplines

View publications per year as a table
Helmut Sies: publications per year, 1969 to 2025
Year Publications
1969 6
1970 3
1971 1
1972 5
1973 5
1974 3
1975 4
1976 1
1977 8
1978 16
1979 9
1980 10
1981 9
1982 11
1983 22
1984 30
1985 13
1986 12
1987 18
1988 15
1989 30
1990 25
1991 18
1992 29
1993 21
1994 22
1995 21
1996 32
1997 23
1998 31
1999 27
2000 27
2001 27
2002 29
2003 27
2004 21
2005 31
2006 26
2007 19
2008 16
2009 13
2010 7
2011 9
2012 10
2013 6
2014 9
2015 13
2016 3
2017 5
2018 5
2019 4
2020 8
2021 7
2022 10
2023 10
2024 6
2025 2
Total 830
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Helmut Sies publication distribution in Biology and Biochemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Biology and Biochemistry in 2026. The highlighted bar marks where Helmut Sies sits on this spectrum.

No. of scientists
200 400 600 800
Bar chart with 100 bars. Horizontal axis: publications, 47–56 to 1,028+. Vertical axis: number of scientists, 0 to 980. Most scientists, 980, have 127–136 publications. The last bar groups every scientist with 1,028 publications or more. The highlighted bar, 757–766 publications, is where this scientist sits. 47–56 publications: 8 scientists 57–66 publications: 35 scientists 67–76 publications: 106 scientists 77–86 publications: 231 scientists 87–96 publications: 413 scientists 97–106 publications: 546 scientists 107–116 publications: 704 scientists 117–126 publications: 848 scientists 127–136 publications: 980 scientists 137–146 publications: 942 scientists 147–156 publications: 969 scientists 157–166 publications: 949 scientists 167–176 publications: 951 scientists 177–186 publications: 915 scientists 187–196 publications: 787 scientists 197–206 publications: 840 scientists 207–216 publications: 733 scientists 217–226 publications: 708 scientists 227–236 publications: 651 scientists 237–246 publications: 605 scientists 247–256 publications: 510 scientists 257–266 publications: 524 scientists 267–276 publications: 434 scientists 277–286 publications: 417 scientists 287–296 publications: 350 scientists 297–306 publications: 363 scientists 307–316 publications: 315 scientists 317–326 publications: 296 scientists 327–336 publications: 261 scientists 337–346 publications: 240 scientists 347–356 publications: 219 scientists 357–366 publications: 196 scientists 367–376 publications: 154 scientists 377–386 publications: 161 scientists 387–396 publications: 155 scientists 397–406 publications: 145 scientists 407–416 publications: 124 scientists 417–426 publications: 112 scientists 427–436 publications: 132 scientists 437–446 publications: 116 scientists 447–456 publications: 99 scientists 457–466 publications: 81 scientists 467–476 publications: 91 scientists 477–486 publications: 80 scientists 487–496 publications: 80 scientists 497–506 publications: 59 scientists 507–516 publications: 36 scientists 517–526 publications: 46 scientists 527–536 publications: 54 scientists 537–546 publications: 44 scientists 547–556 publications: 43 scientists 557–566 publications: 43 scientists 567–576 publications: 42 scientists 577–586 publications: 25 scientists 587–596 publications: 34 scientists 597–606 publications: 23 scientists 607–616 publications: 33 scientists 617–626 publications: 31 scientists 627–636 publications: 27 scientists 637–646 publications: 25 scientists 647–656 publications: 28 scientists 657–666 publications: 34 scientists 667–676 publications: 18 scientists 677–686 publications: 16 scientists 687–696 publications: 10 scientists 697–706 publications: 12 scientists 707–716 publications: 21 scientists 717–726 publications: 12 scientists 727–736 publications: 12 scientists 737–746 publications: 10 scientists 747–756 publications: 7 scientists 757–766 publications: 13 scientists 767–776 publications: 15 scientists 777–786 publications: 13 scientists 787–796 publications: 9 scientists 797–806 publications: 9 scientists 807–816 publications: 7 scientists 817–826 publications: 4 scientists 827–836 publications: 9 scientists 837–846 publications: 7 scientists 847–856 publications: 3 scientists 857–866 publications: 5 scientists 867–876 publications: 5 scientists 877–886 publications: 11 scientists 887–896 publications: 3 scientists 897–906 publications: 4 scientists 907–916 publications: 7 scientists 917–926 publications: 5 scientists 927–936 publications: 6 scientists 937–946 publications: 6 scientists 947–956 publications: 3 scientists 957–966 publications: 7 scientists 967–976 publications: 2 scientists 977–986 publications: 2 scientists 987–996 publications: 1 scientist 997–1,006 publications: 5 scientists 1,007–1,016 publications: 2 scientists 1,017–1,026 publications: 2 scientists 1,027 publications: 1 scientist 1,028+ publications: 100 scientists
47–56 publications 1,028+

This scientist: 766 publications — 99th percentile

99% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,028 publications or more.

View publications distribution as a table
Number of Biology and Biochemistry scientists by publication count, Research.com 2026 ranking edition. Based on 19,587 ranked scientists.
Publications Scientists This scientist
47–56 8
57–66 35
67–76 106
77–86 231
87–96 413
97–106 546
107–116 704
117–126 848
127–136 980
137–146 942
147–156 969
157–166 949
167–176 951
177–186 915
187–196 787
197–206 840
207–216 733
217–226 708
227–236 651
237–246 605
247–256 510
257–266 524
267–276 434
277–286 417
287–296 350
297–306 363
307–316 315
317–326 296
327–336 261
337–346 240
347–356 219
357–366 196
367–376 154
377–386 161
387–396 155
397–406 145
407–416 124
417–426 112
427–436 132
437–446 116
447–456 99
457–466 81
467–476 91
477–486 80
487–496 80
497–506 59
507–516 36
517–526 46
527–536 54
537–546 44
547–556 43
557–566 43
567–576 42
577–586 25
587–596 34
597–606 23
607–616 33
617–626 31
627–636 27
637–646 25
647–656 28
657–666 34
667–676 18
677–686 16
687–696 10
697–706 12
707–716 21
717–726 12
727–736 12
737–746 10
747–756 7
757–766 13 766
767–776 15
777–786 13
787–796 9
797–806 9
807–816 7
817–826 4
827–836 9
837–846 7
847–856 3
857–866 5
867–876 5
877–886 11
887–896 3
897–906 4
907–916 7
917–926 5
927–936 6
937–946 6
947–956 3
957–966 7
967–976 2
977–986 2
987–996 1
997–1,006 5
1,007–1,016 2
1,017–1,026 2
1,027 1
1,028+ 100
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Helmut Sies D-index placement in Biology and Biochemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Biology and Biochemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Helmut Sies sits on this spectrum.

No. of scientists
250 500 750 1,000 1,250
Bar chart with 65 bars. Horizontal axis: D-Index, 40–41 to 167+. Vertical axis: number of scientists, 0 to 1,253. Most scientists, 1,253, have 58–59 D-Index. The last bar groups every scientist with 167 D-Index or more. The highlighted bar, 167+ D-Index, is where this scientist sits. 40–41 D-Index: 80 scientists 42–43 D-Index: 183 scientists 44–45 D-Index: 316 scientists 46–47 D-Index: 504 scientists 48–49 D-Index: 718 scientists 50–51 D-Index: 899 scientists 52–53 D-Index: 1,025 scientists 54–55 D-Index: 1,149 scientists 56–57 D-Index: 1,235 scientists 58–59 D-Index: 1,253 scientists 60–61 D-Index: 1,162 scientists 62–63 D-Index: 1,130 scientists 64–65 D-Index: 1,031 scientists 66–67 D-Index: 897 scientists 68–69 D-Index: 814 scientists 70–71 D-Index: 714 scientists 72–73 D-Index: 709 scientists 74–75 D-Index: 596 scientists 76–77 D-Index: 512 scientists 78–79 D-Index: 473 scientists 80–81 D-Index: 412 scientists 82–83 D-Index: 373 scientists 84–85 D-Index: 358 scientists 86–87 D-Index: 285 scientists 88–89 D-Index: 273 scientists 90–91 D-Index: 227 scientists 92–93 D-Index: 208 scientists 94–95 D-Index: 193 scientists 96–97 D-Index: 153 scientists 98–99 D-Index: 157 scientists 100–101 D-Index: 148 scientists 102–103 D-Index: 120 scientists 104–105 D-Index: 113 scientists 106–107 D-Index: 100 scientists 108–109 D-Index: 86 scientists 110–111 D-Index: 67 scientists 112–113 D-Index: 71 scientists 114–115 D-Index: 73 scientists 116–117 D-Index: 64 scientists 118–119 D-Index: 53 scientists 120–121 D-Index: 60 scientists 122–123 D-Index: 54 scientists 124–125 D-Index: 43 scientists 126–127 D-Index: 38 scientists 128–129 D-Index: 49 scientists 130–131 D-Index: 26 scientists 132–133 D-Index: 18 scientists 134–135 D-Index: 23 scientists 136–137 D-Index: 32 scientists 138–139 D-Index: 32 scientists 140–141 D-Index: 27 scientists 142–143 D-Index: 19 scientists 144–145 D-Index: 22 scientists 146–147 D-Index: 12 scientists 148–149 D-Index: 16 scientists 150–151 D-Index: 14 scientists 152–153 D-Index: 10 scientists 154–155 D-Index: 13 scientists 156–157 D-Index: 10 scientists 158–159 D-Index: 7 scientists 160–161 D-Index: 9 scientists 162–163 D-Index: 13 scientists 164–165 D-Index: 4 scientists 166 D-Index: 4 scientists 167+ D-Index: 98 scientists
40–41 D-Index 167+

This scientist: 168 D-Index — 100th percentile

100% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 167 D-Index or more.

View D-Index distribution as a table
Number of Biology and Biochemistry scientists by D-index, Research.com 2026 ranking edition. Based on 19,587 ranked scientists.
D-Index Scientists This scientist
40–41 80
42–43 183
44–45 316
46–47 504
48–49 718
50–51 899
52–53 1,025
54–55 1,149
56–57 1,235
58–59 1,253
60–61 1,162
62–63 1,130
64–65 1,031
66–67 897
68–69 814
70–71 714
72–73 709
74–75 596
76–77 512
78–79 473
80–81 412
82–83 373
84–85 358
86–87 285
88–89 273
90–91 227
92–93 208
94–95 193
96–97 153
98–99 157
100–101 148
102–103 120
104–105 113
106–107 100
108–109 86
110–111 67
112–113 71
114–115 73
116–117 64
118–119 53
120–121 60
122–123 54
124–125 43
126–127 38
128–129 49
130–131 26
132–133 18
134–135 23
136–137 32
138–139 32
140–141 27
142–143 19
144–145 22
146–147 12
148–149 16
150–151 14
152–153 10
154–155 13
156–157 10
158–159 7
160–161 9
162–163 13
164–165 4
166 4
167+ 98 168
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Research.com Recognitions

  • 2026 - Research.com Biology and Biochemistry in Germany Leader Award
  • 2025 - Research.com Best Scientists Award
  • 2025 - Research.com Biology and Biochemistry in Germany Leader Award
  • 2023 - Research.com Biology and Biochemistry in Germany Leader Award
  • 2022 - Research.com Biology and Biochemistry in Germany Leader Award
  • 2000 - German National Academy of Sciences Leopoldina - Deutsche Akademie der Naturforscher Leopoldina – Nationale Akademie der Wissenschaften Biochemistry and Biophysics

Overview

Helmut Sies is affiliated with Heinrich Heine University Düsseldorf in Germany and has made substantial contributions in the fields of biochemistry, genetics, and molecular biology. Their research primarily focuses on redox biology and oxidative stress, covering topics such as free radicals and antioxidants, vitamin C and antioxidants research, gout, hyperuricemia, uric acid, plant toxicity and pharmacological properties, glutathione transferases and polymorphisms, and genomics, phytochemicals, and oxidative stress.

The scientist has published extensively, with papers appearing frequently in journals like Free Radical Biology and Medicine, Nature Reviews Molecular Cell Biology, Redox Biology, BIOspektrum, and Nature Metabolism.

Recent significant publications include:

  • Fundamentals of redox regulation in biology, 2024, Nature Reviews Molecular Cell Biology
  • Defining roles of specific reactive oxygen species (ROS) in cell biology and physiology, 2022, Nature Reviews Molecular Cell Biology
  • Oxidative eustress: On constant alert for redox homeostasis, 2021, Redox Biology
  • Reactive oxygen species (ROS) as pleiotropic physiological signalling agents, 2020, Nature Reviews Molecular Cell Biology
  • Oxidative Stress: Concept and Some Practical Aspects, 2020, Antioxidants

Their work often involves collaboration with recurring coauthors including Michael J. Davies, Giovanni E. Mann, Willem H. Koppenol, Kelvin J.A. Davies, and Barry Halliwell.

Helmut Sies's main research areas span molecular biology, organic chemistry, nutrition and dietetics, biochemistry, and physiology. This multidisciplinary approach facilitates investigations into the biochemical pathways and physiological roles of oxidative stress and redox regulation.

In recognition of their scientific contributions, Helmut Sies was inducted into the German National Academy of Sciences Leopoldina in 2000.

Best Publications

  • Hydroperoxide metabolism in mammalian organs.

    B Chance;H Sies;A Boveris

  • Oxidative stress: oxidants and antioxidants

    H Sies

  • Lycopene as the most efficient biological carotenoid singlet oxygen quencher.

    P Di Mascio;S Kaiser;H Sies

  • Strategies of antioxidant defense

    Helmut Sies

  • Oxidative stress: a concept in redox biology and medicine.

    Helmut Sies

  • Glutathione and its role in cellular functions.

    Helmut Sies

  • Oxidative stress: from basic research to clinical application.

    Helmut Sies

  • Assay of glutathione, glutathione disulfide, and glutathione mixed disulfides in biological samples.

    Theodorus P.M. Akerboom;Helmut Sies

  • Chemistry of biologically important synthetic organoselenium compounds.

    Mugesh G;du Mont Ww;Sies H

  • Biochemistry of oxidative stress

    Helmut Sies

  • Hydrogen peroxide as a central redox signaling molecule in physiological oxidative stress: Oxidative eustress.

    Helmut Sies

  • Vitamins E and C, beta-carotene, and other carotenoids as antioxidants.

    H Sies;W Stahl

  • Antioxidant activity of carotenoids.

    Wilhelm Stahl;Helmut Sies

  • (–)-Epicatechin mediates beneficial effects of flavanol-rich cocoa on vascular function in humans

    Hagen Schroeter;Christian Heiss;Christian Heiss;Jan Balzer;Petra Kleinbongard

  • Antioxidant defense systems: the role of carotenoids, tocopherols, and thiols.

    P Di Mascio;M E Murphy;H Sies

  • Bioactivity and protective effects of natural carotenoids.

    Wilhelm Stahl;Helmut Sies

  • Antioxidant Functions of Vitamins

    Helmut Sies;Wilhelm Stahl;Alfred R. Sundquist

  • A novel biologically active seleno-organic compound--I. Glutathione peroxidase-like activity in vitro and antioxidant capacity of PZ 51 (Ebselen).

    Armin Müller;Enrique Cadenas;Peter Graf;Helmut Sies

  • Lycopene: A Biologically Important Carotenoid for Humans?

    Wilhelm Stahl;Helmut Sies

Frequent Co-Authors

Wilhelm Stahl
Wilhelm Stahl Heinrich Heine University Düsseldorf
Karlis Briviba
Karlis Briviba Heinrich Heine University Düsseldorf
Lars-Oliver Klotz
Lars-Oliver Klotz Friedrich Schiller University Jena
Enrique Cadenas
Enrique Cadenas University of Southern California
Wolfgang A. Schulz
Wolfgang A. Schulz Heinrich Heine University Düsseldorf
Dieter Häussinger
Dieter Häussinger Heinrich Heine University Düsseldorf
Albrecht Wendel
Albrecht Wendel University of Konstanz
Paolo Di Mascio
Paolo Di Mascio Universidade de São Paulo
Patrizia Mecocci
Patrizia Mecocci University of Perugia
Herbert de Groot
Herbert de Groot Heinrich Heine University Düsseldorf

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