Mapping the global research landscape on nutrition and the gut microbiota: Visualization and bibliometric analysis

Table 1 List of the top ten countries publishing research on nutrition and the gut microbiota from 2012 to 2021

Ranking	Country	Number of documents	%
1st	China	1634	30.38
2nd	United States	1307	24.30
3rd	Italy	346	6.43
4th	Spain	313	5.82
5th	United Kingdom	259	4.82
6th	Canada	246	4.57
7th	Germany	240	4.46
8th	Australia	227	4.22
9th	France	216	4.02
10th	South Korea	204	3.79

Table 2 The top 10 productive affiliations publishing research on nutrition and the gut microbiota from 2012 to 2021

Ranking	Institute	Country	n	%
1st	Chinese Academy of Sciences	China	138	2.57
2nd	China Agricultural University	China	111	2.06
3rd	Chinese Academy of Agricultural Sciences	China	95	1.77
4th	University College Cork	Ireland	81	1.51
5th	APC Microbiome Ireland	Ireland	80	1.49
6th	Nanjing Agricultural University	China	74	1.38
7th	Københavns Universitet	Denmark	73	1.36
8th	Wageningen University & Research	Netherlands	62	1.15
9th	Consejo Superior de Investigaciones Científicas	Spain	55	1.02
10th	Dankook University	South Korea	54	1.00

Table 3 The top ten funding agencies having the most publications on nutrition and the gut microbiota from 2012 to 2021

Ranking	Funding agencies	Country	No. of publication	%
1st	National Natural Science Foundation of China	China	711	13.22
2nd	National Institutes of Health	United States	327	6.08
3rd	National Institute of Diabetes and Digestive and Kidney Diseases	United States	190	3.53
4th	National Key Research and Development Program of China	China	184	3.42
5th	European Commission	European Union	102	1.90
6th	Ministry of Science and Technology of the People's Republic of China	China	86	1.60
6th	National Institute of General Medical Sciences	China	86	1.60
8th	European Regional Development Fund	European Union	80	1.49
9th	National Institute of Allergy and Infectious Diseases	United States	75	1.39
10th	Horizon 2020 Framework Programme	European Union	74	1.38

Table 4 The top 10 most active journals publishing research on nutrition and the gut microbiota from 2012 to 2021

Ranking	Journal	n	%	IF1
1st	Nutrients	271	5.04	5.717
2nd	Frontiers in Microbiology	167	3.11	5.64
3rd	Scientific Reports	136	2.53	4.379
4th	Plos One	124	2.31	3.24
5th	Food and Function	116	2.16	5.396
6th	Journal of Functional Foods	87	1.62	4.451
7th	Molecular Nutrition and Food Research	82	1.52	5.914
8th	Poultry Science	78	1.45	3.352
9th	Animals	70	1.30	2.752
10th	Journal of Agricultural and Food Chemistry	68	1.26	5.279

¹Impact factor (IF) was extracted from Journal Citation Reports (Source Clarivate, 2021).

Table 5 The top 10 high cited papers on research related to nutrition and the gut microbiota from 2012 to 2021

Ranking	Ref.	Year	Source title	IF1	Impact index per article2	Cited by
1st	David et al[56]	2014	Nature	49.962	506.2	4588
2nd	Koeth et al[57]	2013	Nature Medicine	53.44	242.8	2294
3rd	Den Besten et al[58]	2013	Journal of Lipid Research	5.922	202.2	1921
4th	Claesson et al[59]	2012	Nature	49.962	168.0	1793
5th	Trompette et al[60]	2014	Nature Medicine	53.44	165.6	1368
6th	Flint et al[61]	2012	Nature Reviews Gastroenterology and Hepatology	46.802	96.3	1011
7th	Desai et al[62]	2016	Cell	41.582	182.0	948
8th	Sonnenburg and Bäckhed[63]	2016	Nature	49.962	150.3	914
9th	Chassaing et al[64]	2015	Nature	49.962	122.1	889
10th	Dao et al[65]	2016	Gut	23.059	111.3	796
10th	Singh et al[10]	2017	Journal of Translational Medicine	5.531	148.0	796

¹Impact factor (IF) was extracted from Journal Citation Reports (Source Clarivate, 2021).

²The impact index per article is presented based on Reference Citation Analysis [Source: Baishideng Publishing Group Inc. (Pleasanton, CA 94566, United States)].