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I am a postdoctoral researcher in the team wellbeing. I have a background in Human Nutrition and Health, in which I specialized in metabolomics and nutritional physiology.
My research focuses on studying the biological basis of individual differences in wellbeing using (multi-)omics and to what extend this is influenced by genetic and environmental factors, while considering health and lifestyle factors. Furthermore, I am highly interested in the gut-brain connection and wellbeing.
Academic qualification
Nutrition and Health, Master, Nutritional Physiology and Public Health, Wageningen University & Research
1 Sept 2013 → 1 Jul 2015
Nutrition and Health, Bachelor, Wageningen University & Research
1 Sept 2008 → 1 Jul 2012
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Collaborations and top research areas from the last five years
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The multidimensional structure of wellbeing: genetic evidence from a multivariate twin study including the Mental Health Continuum
Azcona Granada, N., Geijsen, A., de Vries, L. P., Pelt, D. & Bartels, M., 30 Mar 2026, (Submitted).Research output: Working paper / Preprint › Preprint › Academic
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Adolescent wellbeing is associated with positive outcomes in early adulthood in a sibling comparison study
Geijsen, A. J. M. R. & Bartels, M., 2026, In: Nature Communications. 17, p. 1-15 15 p., 4109.Research output: Contribution to Journal › Article › Academic › peer-review
Open Access -
The association between metabolite concentrations and wellbeing in adults
Azcona-Granada, N., Geijsen, A. J. M. R., Pool, R., Pelt, D. H. M. & Bartels, M., Dec 2025, In: Scientific Reports. 15, 1, 6997.Research output: Contribution to Journal › Article › Academic › peer-review
Open Access -
The Hidden Biology of Wellbeing: A Multi-Omics Analysis Across Genomic, Epigenomic, and Transcriptomic Layers
Azcona-Granada, N., Geijsen, A., van Dongen, J., Pool, R., Huider, F., Badia-I-Mompel, P., Pelt, D. & Bartels, M., 10 Oct 2025, (Submitted).Research output: Working paper / Preprint › Preprint › Academic
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Cohort profile: Biomarkers related to folate-dependent one-carbon metabolism in colorectal cancer recurrence and survival - The FOCUS Consortium
Gigic, B., Van Roekel, E., Holowatyj, A. N., Brezina, S., Geijsen, A. J. M. R., Ulvik, A., Ose, J., Koole, J. L., Damerell, V., Kiblawi, R., Gumpenberger, T., Lin, T., Kvalheim, G., Koelsch, T., Kok, D. E., Van Duijnhoven, F. J., Bours, M. J., Baierl, A., Li, C. I. & Grady, W. & 9 others, , 22 Dec 2022, In: BMJ Open. 12, 12, e062930.Research output: Contribution to Journal › Article › Academic › peer-review
Open Access
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The Power of Wellbeing; A multi-omics approach to build an integrative wellbeing framework
Bartels, M. (Principal Investigator), Azcona Granada, N. (Project Researcher), Ligthart, L. (Project Researcher), Geijsen, A. (Project Researcher), de Vries, L. (Project Researcher) & Fey, I. (Project Researcher)
1/09/23 → 31/08/29
Project: Research
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Gut feeling: Studying the relationship between gut microbiota and wellbeing
Geijsen, A. (Principal Investigator)
1/03/24 → 23/05/26
Project: Research