Publications by authors named "Jan Frystyk"

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Effects of a Self-Prepared Carbohydrate-Reduced High-Protein Diet on Cardiovascular Disease Risk Markers in Patients with Type 2 Diabetes.
Ahmad H Alzahrani, Mads J Skytte, Amirsalar Samkani, Mads N Thomsen, Arne Astrup, Christian Ritz, Jan Frystyk, Jens J Holst, Sten Madsbad, Steen B Haugaard

Nutrients· May 2021

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Muscle strength changes and physical activity during gender-affirming hormone therapy: A systematic review.
Mathilde Kamp Nørlund, Louise Lehmann Christensen, Marianne Skovsager Andersen, Tine Taulbjerg Kristensen, Jan Frystyk

Andrology· January 2026

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Cardiac function and coronary plaque development following masculinizing gender-affirming hormone therapy: A prospective cohort study.
Laust Frisenberg Buhl, Marianne S Andersen, Jan Frystyk, Axel Diederichsen, Selma Hasific

Andrology· November 2025

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Semaglutide Treatment of Antipsychotic-Treated Patients With Schizophrenia, Prediabetes, and Obesity: The HISTORI Randomized Clinical Trial.
Ashok A Ganeshalingam, Nicolai Uhrenholt, Sidse Arnfred, Peter Gæde, Signe Düring, Jan Frystyk

JAMA Psychiatry· November 2025

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Characterization of Leydig Cell Dysfunction in Previous Illicit Androgen Users.
Yeliz Bulut, Niels Brandt-Jacobsen, Rasmus Madsen, Mario Thevis, Jan Frystyk

J Clin Endocrinol Metab· October 2025

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Muscle Strength and Power Changes With Gender-Affirming Hormone Therapy.
Mathilde Kamp Nørlund, Jakob Lindberg Nielsen, Marianne Skovsager Andersen, Rikke Hjortebjerg, Laust Frisenberg Buhl, Jan Frystyk

Andrology· October 2025

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Bioactive Insulin-like Growth Factor (IGF)-I Concentrations in Children on Growth Hormone Therapy.
Lea Vilmann, Jakob Albrethsen, Jørgen Holm Petersen, Stine Agergaard Holmboe, Peter Christiansen, Jan Frystyk

J Clin Endocrinol Metab· October 2025

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Illicit Anabolic Steroid Use and Cardiovascular Status in Men and Women.
Laust Frisenberg Buhl, Louise Lehmann Christensen, Rikke Hjortebjerg, Selma Hasific, Clara Hjerrild, Jan Frystyk

JAMA Netw Open· August 2025

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HbA levels and breast cancer prognosis in women without diabetes.
Jonas Busk Holm, Jens Meldgaard Bruun, Peer Christiansen, Reimar Wernich Thomsen, Jan Frystyk

BMC Cancer· April 2025

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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.
Bradley S Miller, Joanne C Blair, Michael Højby Rasmussen, Jan Frystyk, Anders Krogh Lemminger

Eur J Endocrinol· April 2025

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Somapacitan in Children Born SGA: 52-Week Efficacy, Safety, and IGF-I Response Results From the Phase 2 REAL5 Study.
Anders Juul, Philippe Backeljauw, Michael Højby, Jan Frystyk, Masanobu Kawai

J Clin Endocrinol Metab· March 2025

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Obese Hypertensive Men Have Fasting Serum Concentrations of Leptin Similar to Those of Obese Normotensive Men.
Camilla L Asferg, Ulrik B Andersen, Jan Frystyk, Allan Linneberg, Paula L Hedley

Am J Hypertens· March 2025

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Prepubertal Children With Obesity Have High Free IGF-1 Levels and Accelerated Growth Despite Reduced Pappalysin Levels.
Álvaro Martín-Rivada, Gabriel Á Martos-Moreno, Santiago Guerra-Cantera, Ana Campillo-Calatayud, Claus Oxvig, Jan Frystyk

J Clin Endocrinol Metab· February 2025

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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.
Mads N Thomsen, Mads J Skytte, Amirsalar Samkani, Philip Weber, Mogens Fenger, Jan Frystyk

Am J Clin Nutr· February 2025

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Acute hepatic porphyria in Denmark; a retrospective study.
Magnus Emil Ulrich Wagner, Morten Frost, Jan Frystyk

Orphanet J Rare Dis· February 2025

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Effects of letrozole therapy in former users of anabolic steroids: A randomized clinical trial.
Jon Jarløv Rasmussen, Yeliz Bulut, Niels Brandt-Jacobsen, Jan Frystyk, Jakob Albrethsen

J Intern Med· January 2025

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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.
Kevin C J Yuen, Rikke Hjortebjerg, Ashok Ainkaran Ganeshalingam, David R Clemmons, Jan Frystyk

Front Endocrinol (Lausanne)· December 2024

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Coronary Microvascular Dysfunction Years After Cessation of Anabolic Androgenic Steroid Use.
Yeliz Bulut, Jon Jarløv Rasmussen, Niels Brandt-Jacobsen, Jan Frystyk, Mario Thevis

JAMA Netw Open· December 2024

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The pro-atherogenic enzyme PAPP-A is active in eluates from human carotid and femoral atherosclerotic plaques.
Mette Faurholdt Gude, Rikke Hjortebjerg, Mette Bjerre, Anne Kathrine Nissen Pedersen, Claus Oxvig, Jan Frystyk

Atheroscler Plus· September 2024

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Similar insulin regulation of splanchnic FFA and VLDL-TG in men with nonalcoholic hepatic steatosis and steatohepatitis.
Jeyanthini Risikesan, Sara Heebøll, Indumathi Kumarathas, Esben Søndergaard, Rakel F Johansen, Jan Frystyk

J Lipid Res· July 2024

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Impact of androgenic anabolic steroid use on cardiovascular and mental health in Danish recreational athletes: protocol for a nationwide cross-sectional cohort study as a part of the Fitness Doping in Denmark (FIDO-DK) study.
Laust Frisenberg Buhl, Louise Lehmann Christensen, Axel Diederichsen, Jes Sanddal Lindholt, Caroline Michaela Kistorp, Jan Frystyk

BMJ Open· May 2024

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Exergaming Improves Cardiac Risk Factors in Prostate Cancer Patients: A Single-Blinded Randomized Controlled Trial.
Brigitta R Villumsen, Jan Frystyk, Martin Grønbech Jørgensen, Britta Hørdam, Michael Borre

Games Health J· April 2024

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Home-based Intervention with Semaglutide Treatment of Neuroleptic-Related Prediabetes (HISTORI): protocol describing a prospective, randomised, placebo controlled and double-blinded multicentre trial.
Ashok Ainkaran Ganeshalingam, Nicolai Gundtoft Uhrenholt, Sidse Arnfred, Peter Haulund Gæde, Niels Bilenberg, Jan Frystyk

BMJ Open· March 2024

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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.
Michael M Richter, Mads N Thomsen, Mads J Skytte, Sasha A S Kjeldsen, Amirsalar Samkani, Jan Frystyk

J Endocr Soc· February 2024

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The IGF-PAPP-A-Stanniocalcin Axis in Serum and Ascites Associates with Prognosis in Patients with Ovarian Cancer.
Rikke Hjortebjerg, Claus Høgdall, Kristian Horsman Hansen, Estrid Høgdall, Jan Frystyk

Int J Mol Sci· February 2024

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Associations between insulin-like growth factor binding protein-2 and insulin sensitivity, metformin, and mortality in persons with T2D.
Rikke Hjortebjerg, Maja R Kristiansen, Ivan Brandslund, Dorte Aa Olsen, Jacob V Stidsen, Jan Frystyk

Diabetes Res Clin Pract· November 2023

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