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This work was partially supported by the International Nut and Dried Fruit Council (INC) via Grant No. 2015 INC Research Grant (PV15110S). INC is a non-profit entity registered at the Register of Foundations of Catalonia, Spain. Nuts were supplied by Crisolar, Spain. The industrial partners were not involved in the design, implementation, analysis, interpretation of the data, writing or review process of the study. LGT. received a pre-doctoral fellowship from the Generalitat de Catalunya's Department of Health, Barcelona, Spain (grant number SLT01720000047); CP is a recipient of the Instituto de Salud Carlos III Miguel Servet fellowship, Madrid, Spain (grant number CP 19/00189); MR received a fellowship from the Generalitat de Catalunya's Agency for management of Universities and Research Grants, Barcelona, Spain (grant number 2022 FI_B1 00160); and MB received the ICREA Academy 2023 Distinction from the Autonomous Government of Catalonia. The authors are grateful for the support of the Departament de Recerca i Universitats de la Generalitat de Catalunya to the Nutrition and Metabolic Health Research Group (2021 SGR 00213).

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Dietary Glycemic Index and Load and Semen Quality: ACross-Sectional and Prospective Analysis within the FERTINUTS Trial

Publicado en:World Journal Of Mens Health. 42 (4): 881-889 - 2024-10-01 42(4), DOI: 10.5534/wjmh.230328

Autores: Mateu-Fabregat, Javier; Papandreou, Christopher; Gutierrez-Tordera, Laia; Rojas, Melina; Novau-Ferre, Nil; Mostafa, Hamza; Bullo, Monica

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Purpose: Infertility is a global health issue and nutrition plays a significant role in fertility outcomes. We aimed to investigate the cross-sectional and prospective associations of glycemic index (GI) and glycemic load (GL) with semen quality parameters in a cohort of healthy young men. Materials and Methods: The study included 106 men aged 18-35 years from the FERTINUTS trial. Dietary intake was estimated through 3-day dietary records and several semen parameters were assessed. Multivariable linear regression analysis with the Least Absolute Shrinkage and Selection Operator (LASSO) approach was employed. Results: The cross-sectional analysis revealed positive associations between GI and GL and total sperm count, sperm concentration, and total motility. In the prospective analysis, baseline GI was associated with increases in pH, vitality, immotile sperm or abnormal midpiece and decreases in total sperm count and motility. Conversely, GL was positively associated with changes in vitality and total sperm count. Conclusions: While these findings suggest that GI may have adverse effects on several sperm quality parameters, the results were not consistently observed in the cross-sectional analysis. However, GL was consistently associated with better sperm quality in both analyses. The impact of carbohydrate quality and quantity on fertility remains uncertain and larger prospective studies are needed.

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