Spyridon Ν. Karras

4.8k total citations
126 papers, 2.9k citations indexed

About

Spyridon Ν. Karras is a scholar working on Pathology and Forensic Medicine, Physiology and Endocrinology, Diabetes and Metabolism. According to data from OpenAlex, Spyridon Ν. Karras has authored 126 papers receiving a total of 2.9k indexed citations (citations by other indexed papers that have themselves been cited), including 59 papers in Pathology and Forensic Medicine, 32 papers in Physiology and 26 papers in Endocrinology, Diabetes and Metabolism. Recurrent topics in Spyridon Ν. Karras's work include Vitamin D Research Studies (57 papers), Dietary Effects on Health (21 papers) and Diet and metabolism studies (20 papers). Spyridon Ν. Karras is often cited by papers focused on Vitamin D Research Studies (57 papers), Dietary Effects on Health (21 papers) and Diet and metabolism studies (20 papers). Spyridon Ν. Karras collaborates with scholars based in Greece, United Kingdom and France. Spyridon Ν. Karras's co-authors include Kalliopi Kotsa, Dimitrios G. Goulis, Panagiotis Anagnostis, Cédric Annweiler, Gerasimos E Krassas, William B. Grant, Hana Fakhoury, Theocharis Koufakis, Carol L. Wagner and Pantelis Zebekakis and has published in prestigious journals such as SHILAP Revista de lepidopterología, The Journal of Clinical Endocrinology & Metabolism and Nutrients.

In The Last Decade

Spyridon Ν. Karras

115 papers receiving 2.8k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Spyridon Ν. Karras Greece	29	1.4k	611	580	454	361	126	2.9k
Audrey Y. Chu United States	18	1.2k 0.9×	726 1.2×	708 1.2×	630 1.4×	397 1.1×	29	2.7k
Elisabeth Lerchbaum Austria	29	1.6k 1.1×	285 0.5×	803 1.4×	558 1.2×	584 1.6×	70	3.1k
Jessica A. Alvarez United States	28	1.2k 0.9×	596 1.0×	429 0.7×	582 1.3×	186 0.5×	115	2.8k
Betina H. Thuesen Denmark	32	1.0k 0.7×	786 1.3×	510 0.9×	476 1.0×	525 1.5×	109	3.1k
Paweł Płudowski Poland	25	2.0k 1.5×	490 0.8×	552 1.0×	918 2.0×	260 0.7×	80	3.2k
Claudia Gagnon Canada	25	918 0.7×	759 1.2×	451 0.8×	386 0.9×	339 0.9×	78	2.3k
Haidong Zhu United States	33	739 0.5×	927 1.5×	644 1.1×	578 1.3×	460 1.3×	113	3.4k
Nandita Gupta India	30	1.2k 0.9×	272 0.4×	401 0.7×	677 1.5×	920 2.5×	108	3.2k
Lise Lotte N. Husemoen Denmark	30	895 0.6×	738 1.2×	428 0.7×	295 0.6×	332 0.9×	92	2.5k
Inez Schoenmakers United Kingdom	23	1.1k 0.8×	284 0.5×	376 0.6×	449 1.0×	122 0.3×	48	1.8k

Countries citing papers authored by Spyridon Ν. Karras

Since Specialization

Citations

This map shows the geographic impact of Spyridon Ν. Karras's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Spyridon Ν. Karras with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Spyridon Ν. Karras more than expected).

Fields of papers citing papers by Spyridon Ν. Karras

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Spyridon Ν. Karras. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Spyridon Ν. Karras. The network helps show where Spyridon Ν. Karras may publish in the future.

Co-authorship network of co-authors of Spyridon Ν. Karras

This figure shows the co-authorship network connecting the top 25 collaborators of Spyridon Ν. Karras. A scholar is included among the top collaborators of Spyridon Ν. Karras based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Spyridon Ν. Karras. Spyridon Ν. Karras is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Karras, Spyridon Ν., Konstantinos Michalakis, George Koukoulis, et al.. (2025). Predictors of Vitamin D Status in Religious and Intermittent Fasting: A Comparative Study in Orthodox Nuns and Women from the General Population. Nutrients. 17(10). 1656–1656.

Płudowski, Paweł, William B. Grant, Spyridon Ν. Karras, Armin Zittermann, & Stefan Pilz. (2024). Vitamin D Supplementation: A Review of the Evidence Arguing for a Daily Dose of 2000 International Units (50 µg) of Vitamin D for Adults in the General Population. Nutrients. 16(3). 391–391. 27 indexed citations

Karras, Spyridon Ν., Konstantinos Michalakis, Fotios Tekos, et al.. (2024). Effects of Religious Fasting on Markers of Oxidative Status in Vitamin D-Deficient and Overweight Orthodox Nuns versus Implementation of Time-Restricted Eating in Lay Women from Central and Northern Greece. Nutrients. 16(19). 3300–3300.

Karras, Spyridon Ν., et al.. (2024). The Mediterranean diet, but not time-restricted eating, mediates the effects of nesfatin on beta cell function among overweight, metabolically healthy individuals. International Journal of Food Sciences and Nutrition. 75(4). 445–448. 1 indexed citations

Karras, Spyridon Ν., Theocharis Koufakis, Eirini Manthou, et al.. (2023). Down regulation of the inverse relationship between parathyroid hormone and irisin in male vitamin D-sufficient HIV patients. Journal of Endocrinological Investigation. 46(12). 2563–2571.

Fakhoury, Hana, Hani Tamim, Rene F. Chun, et al.. (2023). Associations of free, bioavailable and total 25-hydroxyvitamin D with neonatal birth anthropometry and calcium homoeostasis in mother–child pairs in a sunny Mediterranean region. British Journal Of Nutrition. 131(5). 801–808. 1 indexed citations

Anouti, Fatme Al, Mira Mousa, Spyridon Ν. Karras, et al.. (2021). Associations between Genetic Variants in the Vitamin D Metabolism Pathway and Severity of COVID-19 among UAE Residents. Nutrients. 13(11). 3680–3680. 19 indexed citations

Karras, Spyridon Ν., et al.. (2021). Effects of Christian Orthodox Fasting Versus Time-Restricted Eating on Plasma Irisin Concentrations Among Overweight Metabolically Healthy Individuals. Nutrients. 13(4). 1071–1071. 18 indexed citations

Karras, Spyridon Ν., Erdinç Dursun, Merve Alaylıoğlu, et al.. (2021). Upregulation of Irisin and Vitamin D-Binding Protein Concentrations by Increasing Maternal 25-Hydrovitamin D Concentrations in Combination with Specific Genotypes of Vitamin D-Binding Protein Polymorphisms. Nutrients. 14(1). 90–90. 2 indexed citations

10.

Karras, Spyridon Ν., et al.. (2021). Implementation of Christian Orthodox fasting improves plasma adiponectin concentrations compared with time-restricted eating in overweight premenopausal women. International Journal of Food Sciences and Nutrition. 73(2). 210–220. 18 indexed citations

11.

Karras, Spyridon Ν., Theocharis Koufakis, Alkiviadis Bais, et al.. (2021). Vitamin D equilibrium affects sex-specific changes in lipid concentrations during Christian Orthodox fasting. The Journal of Steroid Biochemistry and Molecular Biology. 211. 105903–105903. 3 indexed citations

12.

Karras, Spyridon Ν., Theocharis Koufakis, Stergios A. Pοlyzos, et al.. (2020). Similar late effects of a 7-week orthodox religious fasting and a time restricted eating pattern on anthropometric and metabolic profiles of overweight adults. International Journal of Food Sciences and Nutrition. 72(2). 248–258. 24 indexed citations

13.

Karras, Spyridon Ν., Theocharis Koufakis, Dimitrios G. Goulis, et al.. (2019). Characterizing neonatal vitamin D deficiency in the modern era: A maternal-neonatal birth cohort from Southern Europe. The Journal of Steroid Biochemistry and Molecular Biology. 198. 105555–105555. 10 indexed citations

14.

Koufakis, Theocharis, Amalia Sertedaki, Elizabeth‐Barbara Tatsi, et al.. (2019). First Report of Diabetes Phenotype due to a Loss‐of‐Function ABCC8 Mutation Previously Known to Cause Congenital Hyperinsulinism. SHILAP Revista de lepidopterología. 2019(1). 3654618–3654618. 14 indexed citations

15.

Karras, Spyridon Ν., et al.. (2018). The optimal blood pressure target in diabetes mellitus: a quest coming to an end?. Journal of Human Hypertension. 32(10). 641–650. 11 indexed citations

16.

Koufakis, Theocharis, Spyridon Ν. Karras, Омар Мустафа, Pantelis Zebekakis, & Kalliopi Kotsa. (2018). The Effects of High Altitude on Glucose Homeostasis, Metabolic Control, and Other Diabetes-Related Parameters: From Animal Studies to Real Life. High Altitude Medicine & Biology. 20(1). 1–11. 28 indexed citations

17.

Karras, Spyridon Ν., Theocharis Koufakis, Andrea Petróczi, et al.. (2018). Christian Orthodox fasting in practice: A comparative evaluation between Greek Orthodox general population fasters and Athonian monks. Nutrition. 59. 69–76. 23 indexed citations

18.

Koufakis, Theocharis, Spyridon Ν. Karras, Pantelis Zebekakis, & Kalliopi Kotsa. (2018). Orthodox religious fasting as a medical nutrition therapy for dyslipidemia: where do we stand and how far can we go?. European Journal of Clinical Nutrition. 72(4). 474–479. 19 indexed citations

19.

Grammatiki, Maria, Eleni Rapti, Spyridon Ν. Karras, R. A. Ajjan, & Kalliopi Kotsa. (2017). Vitamin D and diabetes mellitus: Causal or casual association?. Reviews in Endocrine and Metabolic Disorders. 18(2). 227–241. 78 indexed citations

20.

Karras, Spyridon Ν., et al.. (2012). Pathogenesis of propylthiouracil-related hepatotoxicity in children: present concepts. Journal of Pediatric Endocrinology and Metabolism. 25(7-8). 623–30. 10 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

Explore authors with similar magnitude of impact