Richie Kirwan

School of Biological and Environmental Sciences

I am very interested in all aspects of how the food we consume can affect our health and performance.

In particular I have focused much of my studies on protein metabolism and how it leads to the preservation and augmentation of muscle mass along with the role of obesity in the development of other disease states.

My current research focuses on the effects of high-protein, Mediterranean-style diets along with resistance training in cardiac-rehabilitation patients in order to see how an increase in muscle mass (and decrease in the the level of sarcopenic obesity) will affect future risk of cardiovascular disease.


Spanish; Castilian


2015, Univesity of Barcelona, Spain, MSc Nutrition and Metabolism
2006, University College Cork, Ireland, BSc Biological Sciences (Microbiology)

Academic appointments

Associate Researcher, Nutrition, Food Science and Gastronomy, University of Barcelona, 2015 - 2017

Journal article

Kirwan R, Mallett GS, Ellis L, Flanagan A. 2022. Limitations of Self-reported Health Status and Metabolic Markers among Adults Consuming a "Carnivore Diet". Current developments in nutrition, 6 :nzac037 DOI Author Url

Kirwan R, Pérez de Heredia F, McCullough D, Butler T, Davies IG. 2022. Impact of COVID-19 lockdown restrictions on cardiac rehabilitation participation and behaviours in the United Kingdom BMC Sports Science, Medicine and Rehabilitation, 14 DOI Author Url Publisher Url Public Url

Mazidi M, Kengne AP, Siervo M, Kirwan R. 2022. Association of Dietary Intakes and Genetically Determined Serum Concentrations of Mono and Poly Unsaturated Fatty Acids on Chronic Kidney Disease: Insights from Dietary Analysis and Mendelian Randomization. Nutrients, 14 DOI Author Url Publisher Url Public Url

Kirwan R, Isanejad M, Davies IG, Mazidi M. 2021. Genetically Determined Serum 25-Hydroxyvitamin D Is Associated with Total, Trunk, and Arm Fat-Free Mass: A Mendelian Randomization Study Journal of Nutrition, Health and Aging, DOI Author Url Publisher Url Public Url

Kirwan RP, Mazidi M, García CR, Lane KE, Jafari A, Butler T, Pérez de Heredia F, Davies IG. 2021. Protein interventions augment the effect of resistance exercise on appendicular lean mass and handgrip strength in older adults: a systematic review and meta-analysis of randomized controlled trials. American Journal of Clinical Nutrition, DOI Author Url Publisher Url Public Url

Mazidi M, Kirwan R, Davies IG. 2021. Genetically determined blood lead is associated with reduced renal function amongst individuals with type 2 diabetes mellitus: insight from Mendelian Randomisation Journal of Molecular Medicine, DOI Author Url Publisher Url Public Url

McCullough D, Kirwan R, Butler T, Pérez de Heredia F, Thijssen DHJ, Lip GYH, Mills J, Davies IG. 2021. Feasibility of a high-PRotein Mediterranean-style diet and resistance Exercise in cardiac Rehabilitation patients with sarcopenic obesity (PRiMER): Study protocol for a randomised control trial Clinical Nutrition ESPEN, DOI Author Url Publisher Url Public Url

Romero-Cordero S, Kirwan R, Noguera-Julian A, Cardellach F, Fortuny C, Moren C. 2021. A Mitocentric View of the Main Bacterial and Parasitic Infectious Diseases in the Pediatric Population International Journal of Molecular Sciences, 22 DOI Author Url Publisher Url Public Url

Kirwan R, McCullough D, Butler T, Pérez de Heredia F, Davies IG, Stewart CE. 2020. Sarcopenia during COVID-19 lockdown restrictions: long-term health effects of short-term muscle loss. Geroscience, DOI Author Url Publisher Url Public Url

Medina-Remón A, Kirwan R, Lamuela-Raventós RM, Estruch R. 2018. Dietary patterns and the risk of obesity, type 2 diabetes mellitus, cardiovascular diseases, asthma, and neurodegenerative diseases Critical Reviews in Food Science and Nutrition, 58 :262-296 DOI Author Url Publisher Url Public Url

Ma L, Mazidi M, Li K, Li Y, Chen S, Kirwan R, Zhou H, Yan N, Rahman A, Wang W, Wang Y. Prevalence of mental health problems among children and adolescents during the COVID-19 pandemic: A systematic review and meta-analysis JOURNAL OF AFFECTIVE DISORDERS, 293 :78-89 DOI Author Url


Kirwan R, Lamuela-Raventos RM, Estruch R. 2019. Genetic Individuality and Alcohol Consumption De Caterina R, Martinez JA, Kohlmeier M. Principles of Nutrigenetics and Nutrigenomics Fundamentals of Individualized Nutrition Academic Press 9780128045725