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Carl L. Keen

D-Index & Metrics

Biology and Biochemistry

D-Index
118
Citations
48701
World Ranking
702
National Ranking
446

Medicine

D-Index
116
Citations
47195
World Ranking
4370
National Ranking
2386

Carl L. Keen 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 Carl L. Keen sits on this spectrum.

47–56 publications: 8 scientists 57–66 publications: 35 scientists 67–76 publications: 106 scientists 77–86 publications: 231 scientists 87–96 publications: 414 scientists 97–106 publications: 546 scientists 107–116 publications: 704 scientists 117–126 publications: 849 scientists 127–136 publications: 980 scientists 137–146 publications: 942 scientists 147–156 publications: 969 scientists 157–166 publications: 950 scientists 167–176 publications: 951 scientists 177–186 publications: 915 scientists 187–196 publications: 787 scientists 197–206 publications: 841 scientists 207–216 publications: 735 scientists 217–226 publications: 709 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: 418 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: 197 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: 60 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 scientists 997–1,006 publications: 5 scientists 1,007–1,016 publications: 2 scientists 1,017–1,026 publications: 2 scientists 1,027 publications: 1 scientists 1,028+ publications: 100 scientists
47 publications 1,028+

This scientist: 724 publications — 98th percentile

98% of scientists in this discipline score the same or lower.

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

Carl L. Keen 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 Carl L. Keen sits on this spectrum.

40–41 D-Index: 80 scientists 42–43 D-Index: 183 scientists 44–45 D-Index: 317 scientists 46–47 D-Index: 504 scientists 48–49 D-Index: 718 scientists 50–51 D-Index: 900 scientists 52–53 D-Index: 1,026 scientists 54–55 D-Index: 1,150 scientists 56–57 D-Index: 1,236 scientists 58–59 D-Index: 1,253 scientists 60–61 D-Index: 1,163 scientists 62–63 D-Index: 1,131 scientists 64–65 D-Index: 1,032 scientists 66–67 D-Index: 897 scientists 68–69 D-Index: 814 scientists 70–71 D-Index: 715 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: 72 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 D-Index 167+

This scientist: 118 D-Index — 97th percentile

97% of scientists in this discipline score the same or lower.

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

Overview

Carl L. Keen is affiliated with the University of California, Davis in the United States. They have a scholarly focus primarily situated in the field of Medicine, with a particular emphasis on Nutrition and Dietetics, Plant Science, Biochemistry, Pharmacology, and Public Health, Environmental and Occupational Health.

The researcher's work spans several main topics, including:

  • Antioxidant Activity and Oxidative Stress
  • Nutritional Studies and Diet
  • Agriculture Sustainability and Environmental Impact
  • Nutrition, Genetics, and Disease
  • Diet and Metabolism Studies
  • Child Nutrition and Water Access
  • Skin Protection and Aging

Notable recent papers authored or coauthored by Carl L. Keen include:

  • Date Palm Fruit (Phoenix dactylifera): Effects on Vascular Health and Future Research Directions, 2021, International Journal of Molecular Sciences
  • Amino Acid Digestibility of Extruded Chickpea and Yellow Pea Protein is High and Comparable in Moderately Stunted South Indian Children with Use of a Dual Stable Isotope Tracer Method, 2020, Journal of Nutrition
  • Plant-Based Foods for Skin Health: A Narrative Review, 2021, Journal of the Academy of Nutrition and Dietetics
  • Potential roles of dietary zeaxanthin and lutein in macular health and function, 2022, Nutrition Reviews
  • Mycelium: A Nutrient-Dense Food To Help Address World Hunger, Promote Health, and Support a Regenerative Food System, 2023, Journal of Agricultural and Food Chemistry

The researcher frequently publishes in scientific venues such as:

  • Current Developments in Nutrition
  • Journal of Agricultural and Food Chemistry
  • Nutrients
  • Advances in Nutrition
  • International Journal of Molecular Sciences

Carl L. Keen's collaborative network includes frequent coauthors such as Roberta R. Holt, Robert M. Hackman, Prae Charoenwoodhipong, Vivien W. Fam, and Xiang Li. These collaborations reflect shared research interests across nutrition, dietetics, and related biomedical sciences.

Best Publications

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

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

  • Copper, oxidative stress, and human health.

    Janet Y. Uriu-Adams;Carl L. Keen

  • Mushrooms, tumors, and immunity.

    A T Borchers;J S Stern;R M Hackman;C L Keen

  • Probiotics and immunity

    Andrea T. Borchers;Carlo Selmi;Carlo Selmi;Frederick J. Meyers;Carl L. Keen

  • Procyanidin dimer B2 [epicatechin-(4β-8)-epicatechin] in human plasma after the consumption of a flavanol-rich cocoa

    Roberta R Holt;Sheryl A Lazarus;M Cameron Sullards;Qin Yan Zhu

  • Mushrooms, tumors, and immunity: an update.

    Andrea T. Borchers;Carl L. Keen;M. Eric Gershwin

  • Influence of ashing techniques on the analysis of trace elements in animal tissue : I. Wet ashing.

    Michael S. Clegg;Carl L. Keen;Bo Lönnerdal;Lucille S. Hurley

  • Flavonoids and Heart Health: Proceedings of the ILSI North America Flavonoids Workshop, May 31–June 1, 2005, Washington, DC

    John W. Erdman;Douglas Balentine;Lenore Arab;Gary Beecher

  • Evidence that the antioxidant flavonoids in tea and cocoa are beneficial for cardiovascular health.

    Penny M. Kris-Etherton;Carl L. Keen

  • Antioxidative Activities of Oolong Tea

    Qin Yan Zhu;Robert M Hackman;Jodi L Ensunsa;Roberta R Holt

  • Cocoa inhibits platelet activation and function

    Dietrich Rein;Teresa G Paglieroni;Ted Wun;Debra A Pearson

  • Epicatechin in Human Plasma: In Vivo Determination and Effect of Chocolate Consumption on Plasma Oxidation Status

    Dietrich Rein;Silvina Lotito;Roberta R. Holt;Carl L. Keen

  • Honey with high levels of antioxidants can provide protection to healthy human subjects.

    Derek D Schramm;Malina Karim;Heather R Schrader;Roberta R Holt

  • Zinc deficiency and immune function.

    C L Keen;M E Gershwin

  • Flavonoid-membrane interactions: a protective role of flavonoids at the membrane surface?

    Patricia I. Oteiza;Alejandra G. Erlejman;Sandra V. Verstraeten;Carl L. Keen

  • Cocoa and chocolate flavonoids: Implications for cardiovascular health

    Francene M Steinberg;Monica M Bearden;Carl L Keen

  • Copper, Zinc, Manganese, and Magnesium Status and Complications of Diabetes Mellitus

    Robert M. Walter;Janet Y. Uriu-Hare;Katherine Lewis Olin;Michelle H. Oster

  • Cocoa antioxidants and cardiovascular health

    Carl L Keen;Roberta R Holt;Patricia I Oteiza;César G Fraga

  • Copper, lysyl oxidase, and extracellular matrix protein cross-linking.

    Robert B. Rucker;Taru Kosonen;Michael S. Clegg;Alyson E. Mitchell

  • Zinc deficiency causes oxidative damage to proteins, lipids and DNA in rat testes.

    Patricia I. Oteiza;Katherine L. Olin;Cesar G. Fraga;Carl L. Keen;Carl L. Keen

Frequent Co-Authors

Bo Lönnerdal
Bo Lönnerdal University of California, Davis
M. Eric Gershwin
M. Eric Gershwin University of California, Davis
Lucille S. Hurley
Lucille S. Hurley University of California, Davis
Harold H. Schmitz
Harold H. Schmitz University of California, Davis
Patricia I. Oteiza
Patricia I. Oteiza University of California, Davis
Cesar G. Fraga
Cesar G. Fraga University of California, Davis
Jeffrey M. Peters
Jeffrey M. Peters Pennsylvania State University
Carlo Selmi
Carlo Selmi Humanitas University
José L. Domingo
José L. Domingo Rovira i Virgili University
Mark C. Thurmond
Mark C. Thurmond University of California, Davis

External Links

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Best Scientists Citing Carl L. Keen

Bo Lönnerdal

Bo Lönnerdal

University of California, Davis

Publications: 135

Patricia I. Oteiza

Patricia I. Oteiza

University of California, Davis

Publications: 85

Michael Aschner

Michael Aschner

Albert Einstein College of Medicine

Publications: 69

Cesar G. Fraga

Cesar G. Fraga

University of California, Davis

Publications: 66

Yehuda Shoenfeld

Yehuda Shoenfeld

Sheba Medical Center

Publications: 61

Jeremy P. E. Spencer

Jeremy P. E. Spencer

University of Reading

Publications: 59

M. Eric Gershwin

M. Eric Gershwin

University of California, Davis

Publications: 59

José L. Domingo

José L. Domingo

Rovira i Virgili University

Publications: 48

Alan Crozier

Alan Crozier

University of Glasgow

Publications: 43

Gary Williamson

Gary Williamson

Monash University

Publications: 40

Malte Kelm

Malte Kelm

Heinrich Heine University Düsseldorf

Publications: 37

Carlo Selmi

Carlo Selmi

Humanitas University

Publications: 33

John L. Beard

John L. Beard

Pennsylvania State University

Publications: 33

Helmut Sies

Helmut Sies

Heinrich Heine University Düsseldorf

Publications: 31

Michael K. Georgieff

Michael K. Georgieff

University of Minnesota

Publications: 31

Joseph R. Prohaska

Joseph R. Prohaska

University of Minnesota

Publications: 30

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