Citation Rankings
Highly Cited Researchers
Highly Cited Researchers 1.118 Scientists Citation Rankings - 2025
Discover the world’s highly cited researchers through the AD Scientific Index 2025 Citation Rankings.
These rankings evaluate scientists based on their total and recent citation counts, capturing the breadth and real-time currency of academic recognition. Citation data reveals how widely a scholar’s work is referenced, applied, and extended across diverse disciplines. The rankings are routinely updated to reflect ongoing citation growth, while eliminating distortions from excessive co-authorship and institutional inflation. Premium tools provide access to detailed citation dynamics, unethical citation behavior detection, and field-normalized benchmarking.
* Total Citation Counts Rankings
Ranking Based On Selection: 1
Neuropharmacology
stress
neurogastroenterology
microbiome
psychopharmacolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
129,489
77,551
0.599
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* Total Citation Counts Rankings
Ranking Based On Selection: 2
gut microbiota
psychiatry
nutrition
psychopharmacolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
129,175
75,093
0.581
* Total Citation Counts Rankings
Ranking Based On Selection: 3
Microbiome
Antimicrobials
Gut health
Bacteriophage
Pathogen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
110,166
52,992
0.481
* Total Citation Counts Rankings
Ranking Based On Selection: 4
Microbiology
microbiome
bacteriophage
bacteriocins
infectio
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
103,254
48,571
0.470
* Total Citation Counts Rankings
Ranking Based On Selection: 5
microbiome
IBD
mucosal immunology
microbiota
medical humanitie
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
87,491
30,886
0.353
* Total Citation Counts Rankings
Ranking Based On Selection: 6
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
62,212
20,071
0.323
* Total Citation Counts Rankings
Ranking Based On Selection: 7
Bacteriophage
lactic acid bacteria
bifidobacteria
gut microbiot
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
61,639
30,644
0.497
* Total Citation Counts Rankings
Ranking Based On Selection: 8
Microbiome
lactobacillus
IBS
colorectal cancer
agein
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
57,387
33,469
0.583
* Total Citation Counts Rankings
Ranking Based On Selection: 9
Cheese
Milk Proteins
Heat Stability of Milk
Enzymolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
51,299
12,519
0.244
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* Total Citation Counts Rankings
Ranking Based On Selection: 10
Neurogastroenterology
Microbiome
Tryptophan
Kynurenine
Stres
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
47,972
33,675
0.702
* Total Citation Counts Rankings
Ranking Based On Selection: 11
Cereal and beverage scienc
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
45,360
23,231
0.512
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Gut microbiome
Nutrition
Evolutionary Ecolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
40,346
26,518
0.657
* Total Citation Counts Rankings
Ranking Based On Selection: 13
food allergy paediatrics anaphylaxis eczema immunotherap
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
37,398
12,486
0.334
* Total Citation Counts Rankings
Ranking Based On Selection: 14
Food Packaging
Food Science
Meat
Poultry and Seafood Processing and Technolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
37,041
16,170
0.437
* Total Citation Counts Rankings
Ranking Based On Selection: 15
Cardiovascualr disease epidemiology
diet and health
epidemiology of self harm and suicide..
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
33,016
9,551
0.289
* Total Citation Counts Rankings
Ranking Based On Selection: 16
Biostatistic
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
32,302
8,736
0.270
* Total Citation Counts Rankings
Ranking Based On Selection: 17
Cheese
dairy chemistry
food scienc
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
32,098
10,641
0.332
* Total Citation Counts Rankings
Ranking Based On Selection: 18
nanotechnology
biosensor technology
immunoassays
bionanomaterials
antimicrobial
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
31,864
9,416
0.296
* Total Citation Counts Rankings
Ranking Based On Selection: 19
Neuroscience
vascular biology
strok
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
30,825
8,335
0.270
* Total Citation Counts Rankings
Ranking Based On Selection: 20
Geriatric Medicine
Pharmacology
Prescribing
Stroke
Dementi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,086
12,080
0.502
* Total Citation Counts Rankings
Ranking Based On Selection: 21
Molecular Microbiology
Microbiome-Host Interactions
Biodiscovery & Biocatalysis
Next Generation Therapeutics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,689
7,000
0.295
* Total Citation Counts Rankings
Ranking Based On Selection: 22
Vitamin D and health
Vitamin K
Nutrition and bone healt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,878
10,040
0.439
* Total Citation Counts Rankings
Ranking Based On Selection: 23
Epidemiolog
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,272
11,184
0.502
* Total Citation Counts Rankings
Ranking Based On Selection: 24
Food
Pharmaceutica
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,201
6,277
0.283
* Total Citation Counts Rankings
Ranking Based On Selection: 25
gut microbiota
microbiome
bile
Listeria
vaccin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
21,809
8,736
0.401
* Total Citation Counts Rankings
Rankings
2,060
5
1
Ranking Based On Selection: 1
John Cryan
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
129,489
77,551
0.599
Neuropharmacology
stress
neurogastroenterology
microbiome
psychopharmacolog
* Total Citation Counts Rankings
Rankings
2,068
6
2
Ranking Based On Selection: 2
Timothy Dinan
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
129,175
75,093
0.581
gut microbiota
psychiatry
nutrition
psychopharmacolog
* Total Citation Counts Rankings
Rankings
2,816
8
3
Ranking Based On Selection: 3
Paul Ross
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
110,166
52,992
0.481
* Total Citation Counts Rankings
Rankings
3,191
9
4
Ranking Based On Selection: 4
Colin Hill
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
103,254
48,571
0.470
Microbiology
microbiome
bacteriophage
bacteriocins
infectio
* Total Citation Counts Rankings
Rankings
4,293
12
5
Ranking Based On Selection: 5
Fergus Shanahan
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
87,491
30,886
0.353
microbiome
IBD
mucosal immunology
microbiota
medical humanitie
* Total Citation Counts Rankings
Rankings
7,581
19
6
Ranking Based On Selection: 6
Gerald Fitzgerald
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
62,212
20,071
0.323
* Total Citation Counts Rankings
Rankings
7,706
21
7
Ranking Based On Selection: 7
Douwe Van Sinderen
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
61,639
30,644
0.497
Bacteriophage
lactic acid bacteria
bifidobacteria
gut microbiot
* Total Citation Counts Rankings
Rankings
8,637
23
8
Ranking Based On Selection: 8
Paul O Toole
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
57,387
33,469
0.583
Microbiome
lactobacillus
IBS
colorectal cancer
agein
* Total Citation Counts Rankings
Rankings
10,316
28
9
Ranking Based On Selection: 9
PF Fox
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
51,299
12,519
0.244
Cheese
Milk Proteins
Heat Stability of Milk
Enzymolog
* Total Citation Counts Rankings
Rankings
11,439
31
10
Ranking Based On Selection: 10
Gerard Clarke
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
47,972
33,675
0.702
Neurogastroenterology
Microbiome
Tryptophan
Kynurenine
Stres
Is Your University Ready for the Future?
Compare your institution’s global, national, and city-level ranking with its 20 closest competitors and set strategic goals.
Gain insights from detailed performance analyses of scientists across 13 major disciplines, identify your strengths, improve weaknesses, and gain a competitive edge.. Check Your Free Sample Performance Analysis
* Total Citation Counts Rankings
Rankings
12,524
35
11
Ranking Based On Selection: 11
Elke Arendt
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
45,360
23,231
0.512
* Total Citation Counts Rankings
Rankings
15,183
46
12
Ranking Based On Selection: 12
Jens Walter
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
40,346
26,518
0.657
Gut microbiome
Nutrition
Evolutionary Ecolog
* Total Citation Counts Rankings
Rankings
17,086
59
13
Ranking Based On Selection: 13
Jonathan Hourihane
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
37,398
12,486
0.334
food allergy paediatrics anaphylaxis eczema immunotherap
* Total Citation Counts Rankings
Rankings
17,340
62
14
Ranking Based On Selection: 14
Joe Kerry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
37,041
16,170
0.437
Food Packaging
Food Science
Meat
Poultry and Seafood Processing and Technolog
* Total Citation Counts Rankings
Rankings
20,711
72
15
Ranking Based On Selection: 15
Ivan J Perry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
33,016
9,551
0.289
Cardiovascualr disease epidemiology
diet and health
epidemiology of self harm and suicide..
* Total Citation Counts Rankings
Rankings
21,480
77
16
Ranking Based On Selection: 16
Tony Fitzgerald
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
32,302
8,736
0.270
* Total Citation Counts Rankings
Rankings
21,691
81
17
Ranking Based On Selection: 17
Paul Lh Mcsweeney
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
32,098
10,641
0.332
Cheese
dairy chemistry
food scienc
* Total Citation Counts Rankings
Rankings
21,923
84
18
Ranking Based On Selection: 18
John Ht Luong
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
31,864
9,416
0.296
nanotechnology
biosensor technology
immunoassays
bionanomaterials
antimicrobial
* Total Citation Counts Rankings
Rankings
23,068
86
19
Ranking Based On Selection: 19
Christian Waeber
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
30,825
8,335
0.270
Neuroscience
vascular biology
strok
* Total Citation Counts Rankings
Rankings
33,343
121
20
Ranking Based On Selection: 20
Paul Gallagher
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,086
12,080
0.502
Geriatric Medicine
Pharmacology
Prescribing
Stroke
Dementi
* Total Citation Counts Rankings
Rankings
34,133
123
21
Ranking Based On Selection: 21
Fergal O Gara
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,689
7,000
0.295
Molecular Microbiology
Microbiome-Host Interactions
Biodiscovery & Biocatalysis
Next Generation Therapeutics
* Total Citation Counts Rankings
Rankings
35,828
128
22
Ranking Based On Selection: 22
Kevin D Cashman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,878
10,040
0.439
* Total Citation Counts Rankings
Rankings
37,199
132
23
Ranking Based On Selection: 23
Emanuele Crocetti
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,272
11,184
0.502
* Total Citation Counts Rankings
Rankings
37,382
134
24
Ranking Based On Selection: 24
Yrjö H Roos
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,201
6,277
0.283
* Total Citation Counts Rankings
Rankings
38,344
137
25
Ranking Based On Selection: 25
Cormac G Gahan
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
21,809
8,736
0.401