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J

Jan Frystyk

University of Southern Denmark

73H-index
510Paper Count
2.1WCitation Count
Published Papers 245
Publication Date
Cardiometabolic Protein Profile Changes During Gender‐Affirming Hormone Therapy: A Prospective Clinical Study
err2026-10-08
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PREAI
errEmilie Bukh Madsen; Louise Lehmann Christensen; Sara Ravn Bach; Louise Skøttrup Christiansen; Mathilde Kamp Nørlund; Tine Taulbjerg Kristensen; Guy T'Sjoen; Anne Pernille Hermann; Camilla Viola Buskbjerg Palm; Jan Frystyk; Marianne Skovsager Andersen; Martin Overgaard; Dorte Glintborg
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OC5.5 - ECE_2183 - Soluble alpha klotho in acquired adult-onset, and congenital growth hormone deficiency
err2026-08-10
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errOAAI
errViviane Almeida; Martin Bidlingmaier; Manuel H Aguiar Oliveira; Katharina Schilbach; Carla R P Oliveira; Angela Leal; Enaldo Melo; Keila R Villar-Gouy; Roberto Salvatori; Jan Frystyk; Kevin C J Yuen; Michael Haenelt; Isabel Stüfchen; Friederike Völter; Elisabeth Nowak; Martin Reincke; Júnia R O L Schweizer
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Bioactive IGF-I Concentrations in Children on GH Therapy
err2025-11-01
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errOAAI
errVilmann, Lea; Albrethsen, Jakob; Petersen, Jorgen Holm; Holmboe, Stine Agergaard; Christiansen, Peter; Main, Katharina Maria; Cleemann, Line; Hansen, Kristian Horsman; Frystyk, Jan; Hagen, Casper P.; Juul, Anders
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Efficacy, safety, and insulin-like growth factor I of weekly somapacitan in children with growth hormone deficiency: 3-year results from REAL4
err2025-05-22
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errOAAI
errMiller, Bradley S.; Blair, Joanne C.; Rasmussen, Michael Hojby; Frystyk, Jan; Lemminger, Anders Krogh; Maniatis, Aristides; Mori, Jun; Boettcher, Volker; Kim, Ho-Seong; Polak, Michel; Horikawa, Reiko
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HbA1c levels and breast cancer prognosis in women without diabetes
err2025-04-28
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errOAAI
errHolm, Jonas Busk; Bruun, Jens Meldgaard; Christiansen, Peer; Thomsen, Reimar Wernich; Frystyk, Jan; Cronin-Fenton, Deirdre; Borgquist, Signe
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Characterization of Leydig Cell Dysfunction in Previous Illicit Androgen Users
err2025-03-01
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errOAAI
errBulut, Yeliz; Brandt-Jacobsen, Niels; Madsen, Rasmus; Thevis, Mario; Frystyk, Jan; Albrethsen, Jakob; Jorgensen, Niels; Juul, Anders; Kistorp, Caroline; Rasmussen, Jon Jarlov
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Acute hepatic porphyria in Denmark; a retrospective study
err2025-02-28
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errOAAI
errWagner, Magnus Emil Ulrich; Frost, Morten; Frystyk, Jan
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Replacing dietary carbohydrate with protein and fat improves lipoprotein subclass profile and liver fat in type 2 diabetes independent of body weight: evidence from 2 randomized controlled trials
err2025-02-01
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errOAAI
errThomsen, Mads N.; Skytte, Mads J.; Samkani, Amirsalar; Weber, Philip; Fenger, Mogens; Frystyk, Jan; Hansen, Elizaveta; Holst, Jens J.; Madsbad, Sten; Magkos, Faidon; Thomsen, Henrik S.; Walzem, Rosemary L.; Haugaard, Steen B.; Krarup, Thure
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Obese Hypertensive Men Have Fasting Serum Concentrations of Leptin Similar to Those of Obese Normotensive Men
err2025-01-10
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PREAI
errAsferg, Camilla L.; Andersen, Ulrik B.; Frystyk, Jan; Linneberg, Allan; Hedley, Paula L.; Christiansen, Michael; Jeppesen, Jorgen L.
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Effects of letrozole therapy in former users of anabolic steroids: A randomized clinical trial
err2024-11-23
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PREAI
errRasmussen, Jon Jarlov; Bulut, Yeliz; Brandt-Jacobsen, Niels; Frystyk, Jan; Albrethsen, Jakob; Thevis, Mario; Jorgensen, Niels; Schou, Morten; Juul, Anders; Kistorp, Caroline
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Growth hormone/insulin-like growth factor I axis in health and disease states: an update on the role of intra-portal insulin
err2024-11-21
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errOAAI
errYuen, Kevin C. J.; Hjortebjerg, Rikke; Ganeshalingam, Ashok Ainkaran; Clemmons, David R.; Frystyk, Jan
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Somapacitan in Children Born SGA: 52-Week Efficacy, Safety, and IGF-I Response Results From the Phase 2 REAL5 Study
err2024-09-13
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errOAAI
errJuul, Anders; Backeljauw, Philippe; Hojby, Michael; Frystyk, Jan; Kawai, Masanobu; Kildemoes, Rasmus Juul; Lemminger, Anders Krogh; Linglart, Agnes; Zuckerman-Levin, Nehama; Horikawa, Reiko
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Similar insulin regulation of splanchnic FFA and VLDL-TG in men with nonalcoholic hepatic steatosis and steatohepatitis
err2024-07-01
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errOAAI
errRisikesan, Jeyanthini; Heeboll, Sara; Kumarathas, Indumathi; Sondergaard, Esben; Johansen, Rakel F.; Ringgaard, Steffen; Aagaard, Niels K.; Sandahl, Thomas D.; Villadsen, Gerda E.; Gormsen, Lars C.; Frystyk, Jan; Jensen, Michael D.; Gronbaek, Henning; Nielsen, Soren
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Circulating C-reactive protein levels as a prognostic biomarker in breast cancer across body mass index groups
err2024-06-24
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errOAAI
errHolm, J. B.; Baggesen, E.; Cronin-Fenton, D.; Frystyk, J.; Bruun, J. M.; Christiansen, P.; Borgquist, S.
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Effect of a 6-Week Carbohydrate-Reduced High-Protein Diet on Levels of FGF21 and GDF15 in People With Type 2 Diabetes
err2024-01-24
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errOAAI
errRichter, Michael M.; Thomsen, Mads N.; Skytte, Mads J.; Kjeldsen, Sasha A. S.; Samkani, Amirsalar; Frystyk, Jan; Magkos, Faidon; Holst, Jens J.; Madsbad, Sten; Krarup, Thure; Haugaard, Steen B.; Albrechtsen, Nicolai J. Wewer
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Associations between insulin-like growth factor binding protein-2 and insulin sensitivity, metformin, and mortality in persons with T2D
err2023-11-01
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errOAAI
errHjortebjerg, Rikke; Kristiansen, Maja R.; Brandslund, Ivan; Olsen, Dorte Aa.; V. Stidsen, Jacob; Nielsen, Jens S.; Frystyk, Jan
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Markers of Glucagon Resistance Improve With Reductions in Hepatic Steatosis and Body Weight in Type 2 Diabetes
err2023-09-21
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errOAAI
errKjeldsen, Sasha A. S.; Thomsen, Mads N.; Skytte, Mads J.; Samkani, Amirsalar; Richter, Michael M.; Frystyk, Jan; Magkos, Faidon; Hansen, Elizaveta; Thomsen, Henrik S.; Holst, Jens J.; Madsbad, Sten; Haugaard, Steen B.; Krarup, Thure; Albrechtsen, Nicolai J. Wewer
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Persistently Decreased Quality of Life and its Determinants in Previous Illicit Androgen Users
err2023-09-14
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PREAI
errBulut, Yeliz; Brandt-Jacobsen, Niels; Buhl, Laust; Schou, Morten; Frystyk, Jan; Kistorp, Caroline; Rasmussen, Jon Jarlov
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Heritability and circulating concentrations of pregnancy-associated plasma protein-A and stanniocalcin-2 in elderly monozygotic and dizygotic twins
err2023-06-02
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errOAAI
errHjortebjerg, Rikke; Pedersen, Dorthe Almind; Mengel-From, Jonas; Jorgensen, Louise Helskov; Christensen, Kaare; Frystyk, Jan
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Exercise increases myocardial free fatty acid oxidation in subjects with metabolic dysfunction-associated fatty liver disease
err2023-05-01
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errOAAI
errRisikesan, Jeyanthini; Heeboll, Sara; Kumarathas, Indumathi; Funck, Kristian L.; Sondergaard, Esben; Johansen, Rakel F.; Ringgaard, Steffen; Tolbod, Lars P.; Johannsen, Mogens; Kanstrup, Helle L.; Gronbaek, Henning; Frystyk, Jan; Gormsen, Lars C.; Nielsen, Soren
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