World's Best Scientists 2026 revealed!
Dirk H. Hellhammer

Dirk H. Hellhammer

D-Index & Metrics

Medicine

D-Index
105
Citations
63937
World Ranking
6654
National Ranking
379

Dirk H. Hellhammer publication distribution in Medicine in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Medicine in 2026. The highlighted bar marks where Dirk H. Hellhammer sits on this spectrum.

101–120 publications: 5 scientists 121–140 publications: 26 scientists 141–160 publications: 73 scientists 161–180 publications: 155 scientists 181–200 publications: 230 scientists 201–220 publications: 363 scientists 221–240 publications: 487 scientists 241–260 publications: 545 scientists 261–280 publications: 722 scientists 281–300 publications: 768 scientists 301–320 publications: 834 scientists 321–340 publications: 895 scientists 341–360 publications: 922 scientists 361–380 publications: 838 scientists 381–400 publications: 861 scientists 401–420 publications: 918 scientists 421–440 publications: 806 scientists 441–460 publications: 771 scientists 461–480 publications: 751 scientists 481–500 publications: 713 scientists 501–520 publications: 617 scientists 521–540 publications: 611 scientists 541–560 publications: 537 scientists 561–580 publications: 504 scientists 581–600 publications: 509 scientists 601–620 publications: 396 scientists 621–640 publications: 386 scientists 641–660 publications: 371 scientists 661–680 publications: 340 scientists 681–700 publications: 336 scientists 701–720 publications: 307 scientists 721–740 publications: 259 scientists 741–760 publications: 230 scientists 761–780 publications: 228 scientists 781–800 publications: 217 scientists 801–820 publications: 204 scientists 821–840 publications: 186 scientists 841–860 publications: 177 scientists 861–880 publications: 155 scientists 881–900 publications: 139 scientists 901–920 publications: 145 scientists 921–940 publications: 116 scientists 941–960 publications: 133 scientists 961–980 publications: 91 scientists 981–1,000 publications: 96 scientists 1,001–1,020 publications: 77 scientists 1,021–1,040 publications: 70 scientists 1,041–1,060 publications: 63 scientists 1,061–1,080 publications: 77 scientists 1,081–1,100 publications: 49 scientists 1,101–1,120 publications: 54 scientists 1,121–1,140 publications: 49 scientists 1,141–1,160 publications: 51 scientists 1,161–1,180 publications: 35 scientists 1,181–1,200 publications: 39 scientists 1,201–1,220 publications: 26 scientists 1,221–1,240 publications: 37 scientists 1,241–1,260 publications: 36 scientists 1,261–1,280 publications: 27 scientists 1,281–1,300 publications: 32 scientists 1,301–1,320 publications: 28 scientists 1,321–1,340 publications: 17 scientists 1,341–1,360 publications: 30 scientists 1,361–1,380 publications: 28 scientists 1,381–1,400 publications: 17 scientists 1,401–1,420 publications: 21 scientists 1,421–1,440 publications: 15 scientists 1,441–1,460 publications: 12 scientists 1,461–1,480 publications: 12 scientists 1,481–1,500 publications: 18 scientists 1,501–1,520 publications: 14 scientists 1,521–1,540 publications: 17 scientists 1,541–1,560 publications: 15 scientists 1,561–1,580 publications: 6 scientists 1,581–1,600 publications: 2 scientists 1,601–1,620 publications: 12 scientists 1,621–1,640 publications: 11 scientists 1,641–1,660 publications: 8 scientists 1,661–1,680 publications: 5 scientists 1,681–1,700 publications: 5 scientists 1,701–1,720 publications: 10 scientists 1,721–1,740 publications: 12 scientists 1,741–1,760 publications: 14 scientists 1,761–1,780 publications: 6 scientists 1,781–1,795 publications: 5 scientists 1,796+ publications: 100 scientists
101 publications 1,796+

This scientist: 267 publications — 11th percentile

11% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,796 publications or more.

Dirk H. Hellhammer D-index placement in Medicine in 2026

The chart shows the D-index (discipline H-index) distribution of Medicine scientists ranked by Research.com in 2026. The highlighted bar marks where Dirk H. Hellhammer sits on this spectrum.

70–71 D-Index: 226 scientists 72–73 D-Index: 391 scientists 74–75 D-Index: 574 scientists 76–77 D-Index: 730 scientists 78–79 D-Index: 891 scientists 80–81 D-Index: 972 scientists 82–83 D-Index: 1,027 scientists 84–85 D-Index: 1,003 scientists 86–87 D-Index: 960 scientists 88–89 D-Index: 970 scientists 90–91 D-Index: 922 scientists 92–93 D-Index: 839 scientists 94–95 D-Index: 808 scientists 96–97 D-Index: 779 scientists 98–99 D-Index: 668 scientists 100–101 D-Index: 611 scientists 102–103 D-Index: 630 scientists 104–105 D-Index: 513 scientists 106–107 D-Index: 541 scientists 108–109 D-Index: 445 scientists 110–111 D-Index: 429 scientists 112–113 D-Index: 400 scientists 114–115 D-Index: 393 scientists 116–117 D-Index: 318 scientists 118–119 D-Index: 302 scientists 120–121 D-Index: 287 scientists 122–123 D-Index: 255 scientists 124–125 D-Index: 256 scientists 126–127 D-Index: 252 scientists 128–129 D-Index: 230 scientists 130–131 D-Index: 179 scientists 132–133 D-Index: 168 scientists 134–135 D-Index: 163 scientists 136–137 D-Index: 159 scientists 138–139 D-Index: 134 scientists 140–141 D-Index: 134 scientists 142–143 D-Index: 118 scientists 144–145 D-Index: 109 scientists 146–147 D-Index: 106 scientists 148–149 D-Index: 74 scientists 150–151 D-Index: 79 scientists 152–153 D-Index: 80 scientists 154–155 D-Index: 87 scientists 156–157 D-Index: 57 scientists 158–159 D-Index: 74 scientists 160–161 D-Index: 69 scientists 162–163 D-Index: 60 scientists 164–165 D-Index: 53 scientists 166–167 D-Index: 39 scientists 168–169 D-Index: 42 scientists 170–171 D-Index: 32 scientists 172–173 D-Index: 39 scientists 174–175 D-Index: 40 scientists 176–177 D-Index: 28 scientists 178–179 D-Index: 19 scientists 180–181 D-Index: 23 scientists 182–183 D-Index: 31 scientists 184–185 D-Index: 18 scientists 186–187 D-Index: 20 scientists 188–189 D-Index: 22 scientists 190–191 D-Index: 13 scientists 192–193 D-Index: 21 scientists 194–195 D-Index: 12 scientists 196–197 D-Index: 12 scientists 198–199 D-Index: 14 scientists 200–201 D-Index: 15 scientists 202–203 D-Index: 13 scientists 204–205 D-Index: 10 scientists 206–207 D-Index: 8 scientists 208–209 D-Index: 4 scientists 210–211 D-Index: 12 scientists 212–213 D-Index: 11 scientists 214–215 D-Index: 10 scientists 216 D-Index: 4 scientists 217+ D-Index: 98 scientists
70 D-Index 217+

This scientist: 105 D-Index — 67th percentile

67% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 217 D-Index or more.

Overview

Dirk H. Hellhammer was a researcher affiliated with the University of Trier in Germany. Their work spanned multiple fields within medicine and neuroscience, focusing particularly on the intersections of stress, sleep, and complementary medicine.

The main fields of study in their research included:

  • Medicine
  • Neuroscience

The subfields Hellhammer contributed to were:

  • Complementary and alternative medicine
  • Experimental and Cognitive Psychology
  • Psychiatry and Mental health
  • Social Psychology
  • Neurology

Their research topics covered a range of areas including:

  • Sleep and related disorders
  • Medicinal Plant Extracts Effects
  • Stress Responses and Cortisol
  • Gut microbiota and health
  • Tryptophan and brain disorders
  • Probiotics and Fermented Foods
  • Obesity, Physical Activity, Diet

Hellhammer authored and coauthored several scientific papers published between 2020 and 2024. Notable recent papers included:

  • "Lacticaseibacillus paracasei Lpc-37® improves psychological and physiological markers of stress and anxiety in healthy adults: a randomized, double-blind, placebo-controlled and parallel clinical trial (the Sisu study)" (2020) in Neurobiology of Stress
  • "Assessment of the Effects of a Sage (Salvia officinalis) Extract on Cognitive Performance in Adolescents and Young Adults" (2021) in bioRxiv (Cold Spring Harbor Laboratory)
  • "Efficacy of a fish hydrolysate supplement on sleep quality: A randomized, double-blind, placebo-controlled, crossover clinical trial" (2024) in Clinical Nutrition ESPEN
  • "Kalium phosphoricum comp. in patients with neurasthenia: a randomized, double-blind, placebo-controlled clinical trial" (2023) in Current Medical Research and Opinion
  • "Neurodoron® for Stress Impairments: A Prospective, Multicenter Non-Interventional Trial" (2022) in Evidence-based Complementary and Alternative Medicine

The frequent coauthors who collaborated with Hellhammer included:

  • Nadin Meyer
  • Franziska Eckert
  • Rebecca Hufnagel
  • Luitgard Spitznagel-Schminke
  • Cristina Semaca

Their work was often published in the following venues:

  • bioRxiv (Cold Spring Harbor Laboratory)
  • Neurobiology of Stress
  • Clinical Nutrition ESPEN
  • Current Medical Research and Opinion
  • Evidence-based Complementary and Alternative Medicine

Dirk H. Hellhammer focused much of their research on the physiological and psychological aspects of stress, the effects of medicinal plants, and the role of sleep quality in health. Their investigations employed randomized controlled trial methodologies frequently, reflecting an emphasis on clinical and experimental approaches within their fields of expertise.

Best Publications

  • The ‘Trier Social Stress Test’ – A Tool for Investigating Psychobiological Stress Responses in a Laboratory Setting

    Clemens Kirschbaum;Karl-Martin Pirke;Dirk H. Hellhammer

  • Two formulas for computation of the area under the curve represent measures of total hormone concentration versus time-dependent change

    Jens C. Pruessner;Clemens Kirschbaum;Gunther Meinlschmid;Dirk H Hellhammer

  • Salivary cortisol in psychoneuroendocrine research: Recent developments and applications

    Clemens Kirschbaum;Dirk H. Hellhammer

  • Impact of gender, menstrual cycle phase, and oral contraceptives on the activity of the hypothalamus-pituitary-adrenal axis.

    Clemens Kirschbaum;Brigitte M. Kudielka;Jens Gaab;Nicole C. Schommer

  • Salivary cortisol as a biomarker in stress research.

    Dirk H. Hellhammer;Stefan Wüst;Brigitte M. Kudielka;Brigitte M. Kudielka

  • The potential role of hypocortisolism in the pathophysiology of stress-related bodily disorders.

    Christine Heim;Ulrike Ehlert;Dirk H Hellhammer

  • Salivary cortisol in psychobiological research: an overview.

    Clemens Kirschbaum;Dirk H. Hellhammer

  • Free Cortisol Levels after Awakening: A Reliable Biological Marker for the Assessment of Adrenocortical Activity

    J.C. Pruessner;O.T. Wolf;D.H. Hellhammer;A. Buske-Kirschbaum

  • A new view on hypocortisolism.

    Eva Fries;Judith Hesse;Juliane Hellhammer;Dirk H. Hellhammer

  • Why do we respond so differently? Reviewing determinants of human salivary cortisol responses to challenge.

    Brigitte M. Kudielka;D.H. Hellhammer;Stefan Wüst

  • Burnout, perceived stress, and cortisol responses to awakening.

    Jens C. Pruessner;Dirk H. Hellhammer;Clemens Kirschbaum

  • Stress- and treatment-induced elevations of cortisol levels associated with impaired declarative memory in healthy adults.

    C Kirschbaum;O.T Wolf;M May;W Wippich

  • HPA axis responses to laboratory psychosocial stress in healthy elderly adults, younger adults, and children: impact of age and gender.

    B.M Kudielka;A Buske-Kirschbaum;D.H Hellhammer;C Kirschbaum

  • Assessment of the cortisol awakening response: Expert consensus guidelines.

    Tobias Stalder;Clemens Kirschbaum;Brigitte M. Kudielka;Emma K. Adam

  • Consistent sex differences in cortisol responses to psychological stress.

    Clemens Kirschbaum;Stefan Wust;Dirk Hellhammer

  • The cortisol awakening response - normal values and confounds.

    Stefan Wüst;Jutta Wolf;Dirk H. Hellhammer;Ilona Federenko

  • Persistent high cortisol responses to repeated psychological stress in a subpopulation of healthy men.

    Clemens Kirschbaum;Jens C. Prüssner;Arthur A. Stone;Ilona Federenko

  • Sex-specific effects of social support on cortisol and subjective responses to acute psychological stress.

    Clemens Kirschbaum;Thomas Klauer;Sigrun-Heide Filipp;Dirk Helmut Hellhammer

  • Attenuated free cortisol response to psychosocial stress in children with atopic dermatitis.

    Angelika Buske-Kirschbaum;Silke Jobst;Andrea Wustmans;Clemens Kirschbaum

  • Genetic factors, perceived chronic stress, and the free cortisol response to awakening.

    Stefan Wüst;Ilona Federenko;Dirk H Hellhammer;C Kirschbaum

Frequent Co-Authors

Stefan Wüst
Stefan Wüst University of Regensburg
Ulrike Ehlert
Ulrike Ehlert University of Zurich
Brigitte M. Kudielka
Brigitte M. Kudielka University of Regensburg
Gunther Meinlschmidt
Gunther Meinlschmidt University Hospital of Basel
Jens C. Pruessner
Jens C. Pruessner University of Konstanz
Robert Kumsta
Robert Kumsta Ruhr University Bochum
Markus Heinrichs
Markus Heinrichs University of Freiburg
Christine Heim
Christine Heim Charité - University Medicine Berlin
Oliver T. Wolf
Oliver T. Wolf Ruhr University Bochum

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